Monthly Archives: February 2017

Rose – Queen of the Garden

We all love roses. It may be the luxurious fragrances, rich colors or the elegant flower forms that attract us. It may be the memories that roses evoke. Whatever the reason, roses are one of the world’s most popular flowers. With so many different types of roses available, ranging from the diminutive miniatures to the towering climbers, there is no excuse to exclude this “Queen of Flowers” from your garden.

Rose Types

There are many types of roses to cultivate, and it can be difficult to choose. If you’re just getting started with roses, consider some of these popular favorites…

  • Hybrid Tea Roses: These blooms are a favorite of rose gardeners who enjoy long-stemmed, large flowers. Hybrid tea flowers have many petals and plants grow upright and tall, about 3-7 feet. These roses are appropriate in either a formal garden or informal planting.
  • Floribunda Roses: These roses have smaller flowers than hybrid teas with the flowers arranged in clusters. This rose bush is useful as a hedge for a border or privacy screen, and is equally stunning in mass plantings.
  • Grandiflora Roses: These beauties were developed by crossing hybrid teas with floribundas. This rose grows to around 10 feet tall so it should be used in the back of the border where its beauty won’t shroud other plants. The flowers of the Grandiflora are hybrid tea form and can be single stemmed or borne in clusters depending on the cultivar.
  • Climbing Roses: These roses make an outstanding vertical display when trained on arbors, walls, fences, trellises and pergolas and can grow from 8-15 feet tall. Flowers may be borne large and single or small and arranged in clusters.
  • Miniature Roses: These delicate nymphs are dwarf in every way – flowers, leaves and height. This rose may be mass planted as a ground cover, used as border or grown in containers on decks, patios and porches.
  • Shrub Roses: These flowers are renowned for their bushy habit and superior disease resistance making them an excellent choice for mass planting. The shrub rose flower may be either single or double. Some types have very showy rose hips.
  • Old Roses: These luscious heirlooms are making a come-back! Although bloom times and color choices are limited, old roses are much more fragrant, vigorous and disease resistant than modern roses. To obtain all the qualities of an old rose combined with a long bloom time of a modern rose, look for the David Austin varieties.

Not sure which rose is just right for your landscape or garden? Our rose experts will be glad to help you choose the perfect rose no matter what thoughts or emotions you want your garden to evoke. Stop in today to see the latest types of roses and the most popular cultivars for this year’s gardening.

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Caution in the Garden… Chlorosis

Yellow means caution, even for plants. While leaf yellowing, known as chlorosis, may be a signal that there is a problem that requires attention, it may also be normal. Understanding when this coloration is to be expected and when it indicates a problem is essential to be sure you’re giving your plants the proper care.

The Good and the Bad About Chlorosis

Chlorosis is the scientific word used to indicate the full or partial yellowing of plant leaves or stems and simply means that chlorophyll is breaking down. There are times when this is normal, expected coloration, and there are times when it indicates deeper problems that need attention.

  • Normal Chlorosis – Yellowing leaves at the base of an otherwise healthy plant is normal; the plant is simply utilizing the nitrogen and magnesium for exposed leaves near its top rather than older, lower leaves. These yellowed, older leaves will eventually shrivel and fall off as newer growth emerges at the top of the plant.
  • Chlorotic Response to Light – Moving a plant from full sun to shade, or visa-versa, can cause yellowing leaves as the plant reacts to the change and stress. Make sure that you grow and maintain your plant in the proper light. Also bear in mind seasonal changes that may affect how much light a plant is exposed to, even if it hasn’t been moved.
  • Chlorotic Response to Moisture – Sudden changes in soil moisture may damage or kill plant roots which can lead to yellowed leaves as the roots are unable to take up sufficient moisture. Most otherwise healthy plants, however, are able to grow new roots as they readjust. Maintain correct soil moisture or move the plants to a more favorable environment.
  • Mineral Deficiency – A shortage of some key mineral nutrients will cause chlorosis in plants. Often, a yellow leaf indicates a lack of nitrogen, however, magnesium, iron, sulfur or manganese deficiencies are indicated by yellowing leaves with prominent green veins. A magnesium deficiency will manifest itself in the yellowing of older leaves. On the other hand, an iron deficiency presents itself in the yellowing of new or young leaves. A simple soil analysis will let you know what minerals or trace elements your soil is deficient in.
  • Soil Factors – Although essential and trace elements may be present in the soil, many other factors affect how the plant uses and absorbs them. If the soil pH is too high/low or there is too much salt in the soil, the plant will not be able to utilize the available nutrients. Test your soil pH and adjust as necessary to be sure the plant can absorb nutrients appropriately to maintain proper foliage colors.
  • Toxins – Although this doesn’t happen frequently, pollutants like paint, oil, chemical solvents, airborne herbicides or pesticides or other pollutants may cause leaves to turn yellow and dark brown before dying. In this case, remove and dispose of the plant and its surrounding soil, and mark the area to be sure it can be treated appropriately and no other plants are inadvertently exposed to the toxins.

It can be alarming to see healthy plants suddenly yellowing, but by understanding chlorosis and how it happens, you can take steps to determine the cause of the color change and what to do to help your plants recover.

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Sweet Peas, the “Queen of Annuals”

For many of us, it’s the sweet pea that declares, “spring is here!” The colors and sweet fragrance announce the coming of warmer days like no other.

The hardest part of growing sweet peas is choosing from the riot of colors. From the palest of pastels to the most vivid of hues (including stripes), reds, pinks, white, blues, purples, yellows…the list seems endless. Many gardeners buy mixed packages of seeds to avoid the decision.

Look at your choices. Do some of the packets confuse you? Wondering about the difference between “tendril” and “non-tendril?” If the seed package says “tendril” this means the plants have small green growths to attach to a surface or netting to help the vine grow upright. This is how the taller sweet pea vines support themselves as they grow to 6′ (or more!). The varieties with no tendrils remain more compact, making them great in containers. Some of these will trail downward. Other dwarf non-vining varieties act as annual fillers in the mixed garden bed or as borders. What fun!

They’re super easy to grow…just sow the seeds 2″ deep in rich well-draining soil in a full to partial sun location. If the soil is heavy, add compost to improve the texture. Keep the soil moist. Germination should occur within 10-28 days. Continue even and consistent watering. When seedlings are 4-5″ tall, thin to create 5-6″ spacing between plants. To encourage bushy and compact plants, pinch the tips when three sets of leaves form. Generally, do not provide additional fertilizer, otherwise the plants may be lush but the flowers will be sparse.

Sweet Pea Secret! Improve the germination rate, especially of the darker colors, by using nail clippers to nick the seed coat and soak overnight before planting.

If you’re impatient, consider buying seedlings from your garden center. This way you’ll have fragrant sweet pea bouquets a month earlier. Here’s another secret, remove any flowers when transplanting. Yes, this is difficult, but it encourages stronger root growth to produce larger flowers later. You’ll be glad you did it.

Those long-lasting, colorful and fragrant flowers are so sweet in large loose arrangements. They’ll easily last a week if you change the water daily and snip off a bit of the stem. Remember, the best way to extend the sweet pea blooming season is by daily picking early in the day. Definitely, not too difficult.

Seeds for perennial sweet peas are also available. Unlike annual sweet peas, the perennial plant will continue to bloom throughout our warm, humid summers. Annual sweet peas tend to have a gloriously heady scent. This is a feature sorely lacking in the perennial form.

By the way…if you just can’t get enough of your annual sweet peas, grow them again in the autumn. Yes, you can! Why do most of us only grow sweet peas in the spring? Probably because we just don’t think about them in the fall. However, they grow just as well in the cool autumn as the spring. Just remember to provide enough time for flowering before the first frost hits.

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Heath or Heather

Often mistaken for one another, heath (Erica) and heather (Calluna) look amazingly similar. To confuse things further, heath is frequently referred to as “spring heather” and some landscapers, garden centers and nurseries may use the names interchangeably. Both types of plants belong to the Ericaceae family, and they share many similarities.

Which is Which?

The key difference between these two popular landscaping plants is that heath blooms from winter to early spring while heather blooms from mid-summer to early fall. Heath features slim, needle-like foliage, while heather’s foliage is flatter and more scale-like. Heath generally only grows to 12 inches tall, while different heather cultivars can range from 8-20 inches tall. With their many similarities for location, soil type and sunlight, however, it is easy to grow these two shrubs together for a much longer and more brilliant flowering season.

Heath and Heather in the Landscape

Both heath and heather are low maintenance, low growing, perennial shrubs that love well-drained, acidic soil, but do not plant them too deeply or their shallow root systems may rot or smother. Heath, or spring heather, has tiny, urn shaped flowers in white, rose or fuchsia and is readily available in early spring. Heather will be more popular later in the season and into early summer, and its bell-like mauve, rose or lavender flowers provide lovely color to the landscape later in the season. Depending on the cultivar, heather’s foliage can range from bright green to golden yellow, reddish or even silvery-gray.

Both plants should be watered well, and mulching around the shrubs will help inhibit weeds and conserve moisture without overwatering. Pruning should be done just after blooming is finished to maintain and shape the plant mounds and discourage overgrowth and legginess.

Heath and heather look terrific planted en masse on a sunny hillside or in the shrub border with other acid-loving plants like azaleas and rhododendrons. They are a welcome addition to the rock garden and can brighten up a dwarf conifer grouping or container garden. Their mounding habit makes the plants easily spill over edges for a naturalized, graceful organic look ideal for cottage gardens and flowing landscape design.

It is important to note, however, that deer can be very attracted to both heath and heather. If these backyard visitors are a problem in your garden or pester your landscape, you may want to take a variety of steps to keep them away from your beautiful shrubs.

Planted together, heath and heather will provide you with a succession of dainty blooms to take you through the entire growing season.

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Growing Under Black Walnut

If you have a black walnut tree on your property, you know how difficult it can be to find anything that will grow anywhere near this plant.

Black walnuts release a substance called juglone into the soil, which is toxic to many ornamental and edible plants and can stunt their growth significantly – in fact, juglone is used as a herbicide in some areas! A mature black walnut tree can have a toxic zone with up to an 80-foot radius, depending on the tree’s size and age. Every part of the walnut tree contains juglone and this substance remains in the soil long after the tree is cut down, continuing to inhibit anything that may be planted in its place.

Fortunately, there is a wide variety of plants that are less affected by juglone and can still thrive in contaminated soil. When choosing to plant in an area where a black walnut is located or where one once stood, it is safe to make your selection from the lists below.

Vegetables

  • Beans
  • Corn
  • Carrots
  • Melons
  • Squash

Fruit

  • Black Raspberry
  • Cherry
  • Nectarine
  • Peach
  • Pear
  • Plum

Annuals

  • Pot-marigold, Calendula officinalis
  • Begonia, fibrous cultivars
  • Morning Glory, Ipomoea
  • Pansy, Viola
  • Zinnia species

Perennials

  • Bugleweed, Ajuga reptans
  • Hollyhock, Alcea rosea
  • European Wild Ginger, Asarum europaeum
  • Astilbe species
  • Bellflower, Campanula latifolia
  • Leopard’s-Bane, Doronicum species
  • Sweet Woodruff, Galium odoratum
  • Cranesbill, Geranium sanguineum
  • Common Daylily, Hemerocallis
  • Coral Bells, Heuchera
  • Plantain-lily, Hosta
  • Siberian Iris, Iris sibirica
  • Balm, Monarda didyma
  • Sundrops, Oenothera fruticosa
  • Summer Phlox, Phlox paniculata
  • Polyanthus Primrose, Primula x polyantha
  • Lungwort, Pulmonaria species
  • Showy Sedum, Sedum spectabile
  • Lamb’s-Ear, Stachys byzantina
  • Spiderwort, Tradescantia virginiana
  • Horned Violet, Viola cornuta

Ferns

  • Crested Wood Fern, Dryopteris cristata
  • Senstitive Fern, Onoclea sensibilis
  • Cinnamon Fern, Osmunda cinnamomea

Bulbs

  • Glory-of-the-Snow, Chionodoxa luciliae
  • Crocus species
  • Winter Aconite, Eranthis hyemalis
  • Snowdrop, Galanthus nivalis
  • Spanish Bluebell, Hyacinthoides hispanica
  • Grape Hyacinth, Muscari botryoides
  • Siberian Squill, Scilla sibirica

Trees

  • Japanese Maples, Acer palmatum
  • Eastern Redbud, Cercis canadensis
  • Canadian Hemlock, Tsuga canadensis

Vines and Shrubs

  • Euonymus species
  • Rose of Sharon, Hibiscus syriacus
  • Honeysuckle, Lonicera species
  • Virginia Creeper, Parthenocissus quinquefolia
  • Arborvitaes, Thuja species

Black walnut can be a challenging plant to have in your landscape, but if you understand the unique characteristics of this tree you can easily pair it with other plants that don’t mind its toxic effects.

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Biokovo Geranium

“So many Geraniums, so little time.” If this is your motto, we completely understand. There are so many fantastic varieties to choose from, but Geranium ‘Biokovo’ is extraordinary. Allow us to tell you why.

First, a little clarification regarding geraniums. Unlike our tender summer annual, commonly called “geranium” (genus: Pelargonium), true Geraniums are hardy, low growing, groundcover perennials commonly known as Cranesbill. I know, this is confusing, but when you see these two “geraniums”, they look nothing alike and they certainly do not behave similarly.

G. ‘Biokovo’, originally found growing in the mountains of Croatia, is cold hardy and semi-evergreen in hardiness zones 5 – 8. Growing up to a foot tall, this Cranesbill blooms in late spring, May to June, with five-petaled, ¾ inch, white flowers tinged pink. The leaves are slightly hairy, lobed, medium green turning orange-red in the fall and are highly aromatic with a pungent, orange-like scent when bruised.

Produced on spreading rhizomes, G. ‘Biokovo’ is easily grown in well-drained soil with average fertility. It is relatively drought tolerant once established and will thrive planted in either full sun or part shade. Fertilize in early spring. Plant divisions may be done in either spring or fall.

Use ‘Biokova’ in the front of the perennial border and in rock gardens. It will steal the show as a long blooming ground cover or edging plant. There are no serious pest or disease problems associate with this or any of the many other hardy Geraniums. It attracts butterflies and resists deer and rabbits.

No wonder Geranium x cantabrigiense ‘Biokovo’ was the 2015 choice for Perennial Plant of the Year!

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Putting on Airs: Tillandsias

Looking for something easy to grow? The air plant, Tillandsia, should be on the top of your list. Tillandsia is the largest genus in the Bromeliad family with over 550 species that vary in color, size, texture and shape. In its native habitat, it will attach itself to trees and rocks using its roots. The air plant derives the nutrients and water they need from the air, hence its common name. And guess what? No soil is necessary! This versatile houseplant is not fussy, and when given minimal care, will adapt to most home and office environments.

Light

Place your Tillandsia where it will receive plenty of light but not direct sunlight. Direct sun will dry out the leaves very quickly. Home or office fluorescent lighting works just fine.

Temperature

50 – 90 degrees Fahrenheit

Water

Once a month, soak your air plant in water for about 20 minutes. If the plant is flowering, a delicate rinse would be more appropriate so that the bloom is not damaged. When through soaking, shake off the excess water from the plant and place in an area with good air circulation. In between soaks, spritz it once a week with clean water from a spray bottle. Indoor heat and air conditioning rob moisture from the air. If the leaves of your air plant start to wrinkle or roll, this is a sign of dehydration. If this happens, give the plant a good soak and spritz it more than once a week.

General Maintenance

It is not unusual for the outer leaves of the air plant to dry out and turn brown, simply remove them. If leaf tips dry a bit and turns brown, cut the tip off and continue with regular care. The plant will grow and look just fine.

One final note, Tillandsias have beautiful brilliant blooms but only bloom once in their lifetime. Depending on the species, the bloom may last several days to several months.

Easy, right?

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Trackable Tools

It’s the beginning of a new gardening season. Hopefully you took out last year’s journal in January or February and reviewed your notes on what you wanted to change, improve, experiment with or eliminate from your garden and landscape. Now is the time to begin implementing some of those great ideas, and it starts with having the right tools.

Where Do Your Tools Go?

One common problem in the garden is misplaced tools. We’ve all found hand tools in the spring that were inadvertently thrown in the compost pile or left under a shrub during fall cleanup. Many of us have spent time we didn’t have to spare walking in circles, looking for the shovel that we just had in our hand. It was laid down for a moment and seemed to disappear. Tools can easily disappear on a crowded workbench or in a cluttered shed, or they may even end up in a brush pile or other unlikely location.

When tools are lost, not only are our gardening chores impacted, but the tools can be damaged by exposure or accidental damage if they’re dropped, run over with a mower or otherwise subjected to inadvertent abuse. This can mean we no longer have the tool we need when we need it most, and we have to make a trip to the garden center to replace a tool – using time and money our gardening budget may not have.

Finding Your Tools

Let’s do things differently this year. Let’s save time, money and our precious tools. Resolve to only buy new hand tools with bright colored handles that are easily seen from afar and stand out to be picked up after a long day in the garden. If you already have a good selection of tools that you love and wish to keep track of, simply cover the handle with a bright colored spray paint on a sunny spring day, or wrap the handles with brightly colored tape or other coverings to make them more visible.

Similarly, take the time to clean out and declutter your garden shed, tool boxes and workbenches, making sure there is a safe, appropriate place to store every tool. If each tool has a place, you’ll be able to see at a glance when a tool may be missing and you can find it quickly before you’ve forgotten where you saw or used it last.

You and your garden will be glad you did!

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Dealing With Winter Damage

It’s early spring – time to survey the damage that winter has produced. In some areas, shrubs may still be hiding under piles of frozen snow, and could be crushed or compacted. Severed tree limbs may lie scattered across the landscape, and bark may be torn and stripped from trunks. It’s difficult to know what to tackle first, but fortunately, much of the damage is easily correctible.

Repairing Winter-Damaged Trees

When surveying and repairing winter damage, start with your trees – they are generally the most valuable additions to your property. As you survey the damage – broken limbs, torn bark, a tilting trunk – ask yourself “Is this tree salvageable or should it be removed?” If the damage is extensive, or you are unsure about how the damage may affect the tree’s overall health or future growth, hire a professional for a consultation. Replacing a severely damaged tree with a younger one, perhaps a type you like even better, may be the best solution.

If a limb is broken somewhere along its length, or damaged beyond repair, employ good pruning practices and saw off the remaining piece at the branch collar, being careful not to cut into the trunk or leave a stub. Sometimes a fallen limb may strip bark off the tree trunk. To repair this damage, cut the ragged edges of the loose bark away from the stripped area to firmly affixed healthy bark. Nature will take care of the rest. Even if the trunk of the tree is split, the tree may still be saved. For large trees, repairing this type of damage usually requires cabling and bracing done by a professional. If the tree is still young, the crotch may be pulled tightly together and tied or taped until the wound eventually heals.

Repairing Winter-Damaged Shrubs

Shrubs can suffer the same damage as trees, including broken limbs and stripped bark. Heavy snowfall can crush smaller shrubs, and larger varieties may have their trunks or centers split from heavy snow or ice accumulation. Most shrubs are resilient, however, and slowly regain their shape as the weather warms. If branches are bent but not broken, you may tie them together to help them along and prevent further damage from late-season storms. Do not tie tightly and remove twine after about a year. Completely broken branches may be pruned away, but take care to maintain the shrub’s form and balance, keeping in mind its growth pattern so it will not look lopsided or ungainly. Again, if the damage is severe, you may need to replace the plant.

The harder the winter is, the more of a beating trees and shrubs will take. With prompt attention in early spring, however, you can easily undo much of the damage and help your landscape recover with ease.

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Trees For Small Spaces

There’s something about putting a tree in the ground that just feels right. In many cases, you start with just a bare trunk with a few branches and then, rather quickly, it begins sprouting new growth. You nurture your new acquisition and each year it increases in height and girth. Finally, one day, you look out the window and a magnificent mature tree is there to greet you!

Trees are a permanent addition to the landscape and therefore require more thought and planning in their selection. When choosing, you will need to consider how much space you have, both above and below the ground, and how large your tree will be at maturity. Large trees should be given the space that they need to grow and thrive.  Some have far reaching roots that, when planted in the wrong location, can damage plumbing and underground utilities as well as buckle nearby pavement. Poor planning may also lead to unwanted heavy branches towering dangerously over the roof of your home. To avoid these problems there is a plethora of small to medium trees available that look great and cause no damage when planted close to your house, sidewalk or driveway.

TREES FOR SMALL SPACES

Acer ginnala (Amur Maple)– multi-stemmed, rounded habit, bright red fall color, 15 – 20’h x 15 – 20’w

Acer griseum (Paperbark Maple) – upright, irregular habit, exfoliating bark, excellent red fall color, 20 – 30’h x 15 – 25’w

Acer palmatum (Japanese Maple) – numerous varieties, textures, colors and forms and sizes for every taste and situation

Aesculus pavia (Red Buckeye) – native, red upright flowers in May to early June, flowers attract hummingbirds, 10 – 20’h x 10 – 20’w

Amelanchier canadensis (Shadblow Serviceberry) – native, shrubby, multi-stemmed trunk tree, white flowers in early spring, edible purplish-black fruit, reddish-orange fall color, 6 – 15’h x 15 – 20’w

Betula pendula ‘Youngii’ (Young’s Weeping Birch) – strong weeping tendency, attractive white bark, yellow fall color, 8 – 12’h x 10’w

Carpinus caroliniana (American Hornbeam) – native, multi-stemmed, smooth muscular gray bark, yellow/red/orange fall color, 20 – 30’h x 20 – 30’w

Cercis Canadensis (Eastern Redbud) – native, often multi-stemmed, purple-pink flowers in early spring, 20 – 30’h x 20 – 30’w

Chionanthus viriginicus (Fringe Tree) – native, multi-stemmed, rounded habit, fringe-like white flowers in May to early June, golden-yellow fall color, 12 – 20’h x 12 – 20’w

Cornus alternifolia (Pagoda Dogwood) – native, tiered horizontal branching, white flowers late May – early June, blue-black fruit, persistent coral colored fruit stalks, yellow/reddish/purple fall color, 25’h x 25’w

Cornus florida (Flowering Dogwood) – native, rounded habit, white or pink flowers in mid-May, reddish-purple fall color, 30’h x 30’w

Cornus kousa (Korean Dogwood) – rounded habit, vase shaped branching habit, flowers white aging to pink in early summer, red to purple fall color, 30’h x 30’w

Cornus mas (Cornelian Cherry Dogwood) – native, multi-stemmed, rounded habit, small yellow flowers in early spring, bright red berries in the summer eaten quickly by birds, 20’h x 20’w

Crataegus viridis ‘Winter King’ (Winter King Hawthorn) – native, broad horizontal crown, white flowers in spring, yellow fall color, abundance of small red berries in winter, 15’h x 20’w

Halesia tetraptera (Carolina Silverbell) – native, irregular to rounded and broad shaped, pendulous white bell-shaped flowers in May, Smooth muscle-like bark, 30 – 40’h x 25 – 35’w

Magnolia stellata (Star Magnolia) – Multi-stemmed tree with oval habit, lightly fragrant showy white blooms in early spring, ornamental smooth silver-gray bark, 15 – 20’h x 10 – 15’w

Malus sargentii (Sargent crabapple) – Mounded habit, blooms April through early May, fragrant flowers, pink-red in bud opening to white, very showy deep red fruit held in clusters, 6 – 8’h x 9 – 12’w

Prunus cerasifera ‘Thundercloud’ (Thundercloud Plum) – Rounded habit, deep purple foliage all year around, slightly fragrant pink flowers in the spring, 20’h x 20’w

Stewartia koreana (Korean Stewartia) – pyramidal or oval in shape, white flowers in June and July, long bloom time, excellent fall color orange/yellow/red/purple, 25’h x 12’w

Stewartia ovate (Mountain Stewartia) – slow grower, dense with spreading branches, white flowers in July, orange to red fall color, 10 – 15’h x 10 – 15’w

Stewartia pseudocamellia (Japanese Stewartia) – slow grower, pyramidal, solitary white camellia-like flowers June – August, excellent fall color yellow/red/purple, beautiful exfoliating camouflage bark exposed in the winter, 40’h x 20’w

Styrax japonica (Japanese Snowbell) – horizontal branching, broad flat topped at maturity, hanging white flowers from late May into June, good fall color of yellow with a reddish cast, 20 – 30’h x 20 – 30’w

Syringa reticulate (Japanese Tree Lilac) – stiff spreading branches, fragrant showy white flowers borne in early summer on panicles up to 1′ long and up to 10” wide, 20 – 20’h x 15 – 15’w