Author Archives: GCS Dev

Woolly Adelgid

Woolly Adelgid is an aphid-like insect that is a serious pest of the Eastern Hemlock, Tsuga canadensis, and its cultivars. Adelgids need to be controlled as this insect spreads easily and rapidly and, if left untreated, can kill a mature hemlock in 4-10 years.

Recognizing Adelgids

Adelgids, formally called Hemlock Woolly Adelgids (Adelges tsugae) or HWA, present as a fuzzy, cottony white substance on the underside of hemlock needles. This is actually a waxy filament produced by the tiny, 1/16-inch insect as a covering and protection for itself and its eggs. These insects are native to Asia, and damage trees by sucking on the sap. As damage occurs, the needles of the tree become grayish rather than robustly dark green. When infected, trees may lose their needles and will not produce new growth on the damaged branches. Because infected trees are significantly weakened, they are subject to many other infections from diseases and pests, and ultimately die.

Controlling Adelgids

Exercising good horticultural practices is the best way to prevent Hemlock Woolly Adelgid infestations. Site your hemlock appropriately, in proper sunlight and a location where it can grow well without being cramped or crowded. Water and feed as required for optimum health, including adding extra fertilization or nutrition as required. A healthy tree will always withstand disease and insect problems better that one that is already stressed.

When Adelgids are present, apply insecticidal soap or horticultural oil in early April and again in June. Be certain to follow manufacturer instructions carefully and reach the underside of the needles where the Adelgids are located. When spraying in June, do so on a cooler, overcast day so as not to burn the Hemlock needles. If your Hemlock is too large to handle on your own, contact a trusted and licensed tree-care professional for treatment. Even after you have controlled an outbreak, annual spraying is recommended to be sure the pests do not reappear.

Other types of chemical treatments that can be used against these invasive pests include…

Foliage Sprays: These insecticides are sprayed over the entire tree to coat the foliage. They are stronger than soaps or oils and may be effective for 2-4 years. Higher toxicity can lead to other problems and contamination concerns, however, and applications should only be done by experienced professionals.
Soil Drenches: These are insecticides that are specially formulated to be absorbed by the tree’s roots and then will be consumed by the Adelgids as they sip on the tree’s sap. This can take longer to be effective, however, but it has long-lasting impact to control these insects. They should not be used where water sources may be inadvertently contaminated.

In some areas, predator beetles have been released to consume Adelgids, and while this is not yet effective on a widespread scale, there have been positive reports and limited success.

Hemlock Woolly Adelgids are a vicious, invasive pest, but with proper control techniques, their invasion can be stopped and the majestic hemlock forests renewed and restored.

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Vegetable Garden Weed Control

You may want to grow many different things in your vegetable garden, but weeds probably aren’t on your favorite edibles list. Weeding can be an enormous time-drain and is one of the the least liked gardening chores. What’s wonderful is that we have so many weed control methods to choose from; there’s a solution for every type of gardener and their schedule.

Safe Control Methods in Edible Gardens

When it comes to vegetable gardening, many gardeners are very particular about what goes into their soil and onto their plants, as it will eventually end up on their plates and in their bodies. Here are some indisputable safe and effective ways to control weeds, without chemicals, in your veggie or any other garden for that matter.

Apply corn gluten meal to prevent weed seeds from germinating (don’t use if direct seeding your garden as all seeds will be affected).
Plan your garden to crowd edible plants together, effectively crowding out weeds because there isn’t space left for them to grow.
Manually pull weeds when the soil is wet and roots are looser. This can be done after a natural rainfall or after supplemental watering.
Hoe when the soil is dry to break apart weeds and damage their roots. Pick up larger weeds after hoeing so they cannot reestablish themselves.
Mulch with salt hay which contains no weed seeds. The hay will shield weed seeds from the sunlight and moisture they need for germinating.
Lay biodegradable and compostable mulch film down to create a firm barrier to keep weeds out or to prevent existing weed seeds from germinating.
Attract seed-loving birds such as finches and sparrows, which will happily eat hundreds of weed seeds each day for natural control.
Consider raised beds or container gardening to more effectively control weeds and make any remaining weeding easier.
Use fire (with all appropriate safety precautions) to burn out unwanted weeds, especially in pathway areas or along garden borders.
Treat exposed weeds with boiling water – the hotter the better – to cook and kill them. Several treatments may be needed for the best effects.

Weeds can be some of our worst enemies in the garden, and it is impossible to eliminate every single weed all the time. By using multiple methods and keeping on top of the task, however, it is possible to minimize weeds and make this chore less onerous, without resorting to harsh chemicals.

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Viburnums

Viburnums are one of the most outstanding groups of shrubs for use in landscape planting. Varying in height from 2-30 feet, viburnums can be found to suit most any planting location. Their varied growth habits, excellent foliage, striking and fragrant flowers, showy fruit and interesting winter appearance make them an excellent choice for most gardeners.

Which Viburnum to Choose

Effective in many situations, the smaller shrub forms, such as Viburnum carlesi ‘Compacta’ and V. opulus ‘Compactum’, are excellent for planting close to houses or in tighter spaces, such as narrow flowerbeds or in side yards. The larger forms, such as V. lantana and V. prunifolium, make good specimen and screen plantings to be a centerpiece in the garden or provide privacy. Which one will work best in your landscape will also depend on the available space you have, your soil type and the sunlight needs of individual plants.

Flowers and Foliage

Viburnum flowers, primarily white in color, are borne in clusters, ranging from a rounded snowball shape to a flat form. Large, white snowball clusters of florets are found on V. carlcephalum and V. macrocephalum. Half-round flower forms are borne on such types as V. carlesi and V. burkwoodi. Most of the others have a flat cluster of florets such as V. plicatum ‘Tomentosum,’ V. dilatatum and others.

Viburnum foliage can be extraordinary with types that include a velvety smooth leaf surface, bold rough-veined textures and glossy leathery character, all of which add more textural interest to the landscape. In addition, some forms have attractive fall leaf color such as the purplish red of V. dentatum and V. dilatatum, as well as the brilliant red of V. opulus.

Brilliant Berries

In the fall and winter there is also ornamental value with berries. Many viburnums produce lovely fruits in shades of red, pink, yellow and blue-black which not only add to fall and winter interest, but can also be attractive to birds and other backyard wildlife.

Viburnum Care

With so many many pleasing aesthetic features of these plants, how easy are they to care for? Easier than you may think! Viburnums are very hardy, resistant to serious pests, thrive in a variety of soil and environmental conditions and require little pruning. They will grow in either sun or shade; however, flowering and fruiting will be more profuse in a sunny location.

With so much to choose from and so many advantages to these shrubs, there’s sure to be one to suit all your landscaping needs. Stop in to consult with our landscaping experts today, and we can help you choose the perfect viburnum to complement your landscape.

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Clematis

Beautiful, showy clematis are not as difficult to grow as you might think. Learning when to prune your clematis and giving a little attention to their few requirements will reward you with a magnificent show of colorful blooms.

Planting Clematis

A beautiful clematis starts with proper planting. Clematis prefer to have their roots in the shade and their tops in the sun. Keep the roots cool with a well-drained rich soil with added compost, peat moss or composted manure and a good layer of mulch. Planting ground cover or other low growing perennials around the base of your clematis will also help to keep the soil cool and minimize weed growth. Organic amendments will help to retain moisture when added to the soil. Feed monthly with a liquid fertilizer or use a slow release fertilizer which can last for up to six months.

A Note About Bloom Rates

For the first few years, clematis may be slow to grow. Just keep in mind that it is establishing its root system, which is essential to a healthy, vibrant plant. In its first year, your clematis may produce very few flowers or even none at all. By the second year there will be more growth and a few flowers. By the third year you should see substantial growth and many lovely blooms.

Planting Clematis

For the best chance of success if you are new to gardening with clematis, buy plants in larger containers. While smaller starts will be less expensive to buy, they will take a little more work to establish and can be more delicate and prone to failure. If you purchase a pot of any size and are not planting it in the ground immediately, be sure not to allow the soil in the container to dry out or the plant may be overly stressed and vulnerable.

Keep the climbing habit of clematis in mind when selecting your planting site. Allow your plants to grow up into large shrubs and trees, or on a trellis against a sunny wall. Select varieties with growth that will not exceed your shrub or trellis; a 20-foot vine may overwhelm a smaller shrub or a weak trellis and will look overgrown and out of place.

Proper Pruning

Clematis are divided into three distinctive groups. Knowing what group your clematis falls under will guide you on when and how to prune.

These pruning suggestions are for established vines that have been in the ground for at least three years. Young vines should all be pruned to 12 inches the second spring and to 18 inches the third spring. This helps to develop more shoots, a fuller vine and a better root system.

Group 1
This group includes certain species clematis and their cultivars which bloom early in the year. Some of the more familiar representatives of this group include the Montanas, varieties of C. alpina and C. macropetala. All of the Group 1 clematis bloom on growth made the previous year. They can be pruned to keep them within their allotted space or to remove dead and unsightly foliage. If they are pruned late in the season or before they flower, however, the cuts may remove potential flower buds and reduce that year’s flowering. To prevent this, prune Group 1 clematis right after flowering.
Group 2
These are the large flowered hybrids. They are often divided again into two subgroups – 2a and 2b. All of the clematis in Group 2 bloom on ‘old wood’ (actually on short shoots from old wood) and should not be pruned except for deadwood pruning in early spring after the leaf buds open slightly.
Group 3
These are the summer-blooming varieties such as the viticellas and Jackmanii types that bloom on new wood and the late bloomers such as Sweet Autumn Clematis (C. terniflora) and orientalis types. Clematis in Group 3 mainly flower on new wood produced in the current year and should be pruned back severely every year in late winter, when they are completely dormant, to about 12-14 inches. Leave at least two pairs of buds on each stem of the plant. Most clematis in this group are very fast growing and will reach their full height before blooming every summer.

Once you know how to properly care for clematis, you will find it to be a welcome addition to your landscape. If you aren’t sure just what your clematis needs to thrive, our expert staff will be glad to help be sure you and your plants have a great relationship!

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Amsonia hubrichtii

Amsonia hubrichtii, commonly known as Arkansas blue star, Arkansas amsonia or threadleaf bluestar, grows 36 inches tall and 36 inches wide in a mounded form. This hardy perennial grows in hardiness zones 4-9 and is a versatile North American native ideal for many landscaping uses in all types of yards and gardens.

Amazing Seasonal Interest

Unlike many plants that truly shine only for one season, Amsonia hubrichtii offers a variety of features throughout the seasons. From late spring to early summer, 2-3-inch wide clusters of small, light blue, star-shaped flowers are borne above the delicately soft, ferny or lacey foliage. The alternate-arranged, narrow leaves are a marvelous bright green in spring and summer, but turn a bright yellow-golden color which is second to none among herbaceous perennials in fall. In winter, the foliage can hold its shape and support snowfall, creating a beautiful mounding effect in the winter landscape.

Caring for Amsonia hubrichtii

These plants thrive in full sun to partial shade and perform best in average, moist, well-drained soil with a neutral (7.0) pH. Full sun will promote the best autumn color, but spring and summer blooms will be more prominent in a part-shade location. In a full shade location or when planted in too-rich soil, however, the plant may tend to open up and flop over, losing its full mounding traits. Though initially slow to grow and less lush and attractive when young, once established, it can tolerate drier conditions. Having no known severe insect or disease problems, other than minor occurrences of Mycosphaerella leaf spot and rust, this is a very easy to care for perennial.

After the flowers have faded, cutting back the foliage to 6-8 inches will help keep the mounds full and compact. Late season growth will fill in the plant in plenty of time for its showstopping autumn color. When the plants are large, they can be divided for transplanting to add even more specimens to the landscape.

In the Landscape

Amsonia is a real asset in borders, native gardens, cottage gardens or open woodland areas. Because of this plant’s versatility, it is also ideal in rock gardens or even rain gardens in well-drained soil. It is best when planted in masses and very attractive when mixed with ornamental grasses and other plants that have attractive seed heads. It tolerates deer and attracts butterflies, making it wildlife-friendly as well.

The outstanding ornamental qualities, ease of maintenance and many uses make Amsonia an invaluable perennial selection for any gardener.

Kids and Nature: Uncovering Surprises Everywhere

Wherever you live, nature is always near, with entire worlds to discover around the trees in your yard, in the carpet of grass or beneath that pile of rocks. With school vacations rapidly approaching, you may already be thinking of ways to keep your children or grandchildren busy during the long summer months. Well, how about setting up your own Nature Camp! An appreciation of nature will stay with children forever and teach them the importance of caring for the environment and all living things, including themselves.

Top Nature Activities for Kids

Spring and summer nature activities with your child could be as simple as a daily walk around the block or backyard, or as complex as starting your own backyard wildlife preserve. Popular options include…

A stroll through the woods or a nearby meadow, observing or gathering things of interest along the way. Spend some time watching ants or earthworms, caterpillars or butterflies. Take an evening walk to look for fireflies and bats or to listen to crickets and frogs. Note different species of birds, or look for other wildlife such as squirrels, rabbits or deer.
Very young children love collecting things – rocks, feathers, flowers, shells and leaves are a few easy examples. See how many different types, colors, shapes or sizes they can find. Older children might want to start a pressed leaf or flower collection, or capture some insects for identification and observation.
Raising butterflies or moths from caterpillars, noting how they grow and change in a nature journal or through a series of photographs to create a scrapbook of the experience. When they’re ready to be released, let the child have the wonder of connecting with nature as their fluttering friends fly free.
A more extensive nature activity could be to help your child plan and plant a whole garden devoted to attracting wildlife. By planting trees, shrubs, perennials and annuals that attract birds (including hummingbirds) and butterflies, and by installing bird feeders, bird houses and bird baths, you can create a miniature wildlife refuge that you and your child can enjoy for many years to come.

We’ll be delighted to help you and your future naturalist select plants suitable for a wildlife garden, plan a backyard refuge or to identify flowers or leaves that have been collected on your nature walks.

So, what are you waiting for? Make the most of this spring with a child and go back to nature!

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Choosing the Right Flowering Tree

Choosing the right flowering tree for your landscape is an investment. It can raise the property value of your home and bring you pleasure, beauty, and shade for many years to come. Selecting the proper flowering tree for your enjoyment is easy! Just follow these simple guidelines and remember, we are here to help you with any of your gardening questions.

Care
Familiarize yourself with the sun patterns where you plan to plant the tree. Will your tree be in full sun, part sun, or shade? What about soil type? Is it heavy clay or well-drained loam? Some trees will survive in poor soil, some will not. Is there a water source nearby? Having a clear understanding of your tree’s cultural requirements and the characteristics of the site you have chosen will help you make a good match so the tree will thrive.
Size & Form
Consider the space. Know the ultimate height and width of the plant that you choose to make certain that it will not outgrow the room you have allotted for it. At the same time, note the growth habits and sizes of nearby trees and shrubs to be sure they don’t crowd one another out in the years to come.
Flowers
When you would like your tree to flower? For instance, you don’t want flowers in August if that is when you are traditionally away on vacation. Many flowering trees are available in more than one flower color, depending on the cultivar. Choose the one that works best for you and your taste and looks good with whatever else you will have flowering at the same time.
Other Ornamental Characteristics
Choose a tree with multiple seasons of interest. Look for a flowering tree that may also have interesting winter bark, persistent fruit, or unique leaf coloration so you can enjoy its beauty in every season.
Availability
Frequently, folks will read about a unique new plant introduction and are disappointed when it is not yet available on the market or does not grow well in their area. To avoid disappointment, choose from our large selection of flowering trees in inventory. We pride ourselves on carrying plants that thrive in our area. We can suggest an appropriate substitute for your desired tree.

With just a bit of careful consideration, you can easily choose a flowering tree that you will enjoy for many years to come.

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Summer Sizzles With Crocosmia

There is an excellent assortment of bulbs available for planting this time of year that promise a bounty of summer blooms. The thing is, many of these bulbs are not winter hardy. This can create a predicament for gardeners anxious for easy summer flowers but short on time and space to dig and store tender bulbs. Crocosmia can be the answer.

Introducing Crocosmia

Native to South Africa, Crocosmia – also known as montbretia, coppertips or falling stars – sizzles all summer long in colors of yellow, orange and red. The numerous small florets are tubular in shape and borne along a long, gracefully arching stem rising above sword-like foliage. Together, this formidable combination creates exotic elegance sure to be a showstopper in the garden or landscape. Hummingbirds and butterflies also find it irresistible when in bloom, and the fall seedpods are delectable for many seed-loving finches and sparrows.

Planting Crocosmia

Plant Crocosmia corms now, while they are available. Plant them in well-drained soil in full sun, 2-3 inches deep and 8-10 inches apart. A south-facing location is best, or in colder regions, add Crocosmia next to a wall that will help warm the soil. The pointy side of the bulb should be facing up. Place a handful of bone meal in the planting hole and water the soil well when done planting. These are drought-tolerant flowers, but supplemental water will still be welcome in extremely dry conditions.

Crocosmia look best when planted en masse. A grouping on either side of a sunny entrance way can be stunning, and they look equally fetching when tucked into the perennial border. This plant performs well in containers and makes an excellent cut flower – in fact, cutting the flowers will encourage even more beautiful blooms to form.

Blooms will first appear in May or June and will continue blooming throughout the summer. Flower spikes can stretch 2-3 feet tall, adding a bold burst of color to the landscape. Even without the flowers, the blade-like foliage is attractive, and some cultivars show pleats or rippling for more textural interest.

After flowers have finished blooming, simply snip off the faded flower stalks. Leave the foliage to fade naturally as you would with any other bulb. These leaves continue to produce food to provide nourishment for next year’s flowers. Leaves may be cut back to the ground once they are completely yellow, and a thick layer of mulch should be added for winter protection. Once established, these bulbs are winter-hardy and will return year after year to heat up the spring and summer with their gorgeous colors and forms.

Edible Flowers

Flowers aren’t just for beautiful dining table centerpieces anymore! For all you “foodies” out there, who also love flowers, are you aware that there are numerous blooms that are not only edible but also delicious? Flowers make a striking, colorful, textural and flavorful addition to soups, salads, baked goods and more.

Safety First

There are just a couple of things to keep in mind when experimenting with unfamiliar flowers. Not all flowers are edible and some can be poisonous, even in small tastes. Be certain to clearly identify your flowers and accept no imposters, as some blooms can look very similar. Also, it is best to use flowers that have not been sprayed with chemicals – either fertilizers or pesticides. The best way to avoid both of these issues is to grow your own edible flowers from seed, keeping them conveniently in a kitchen container garden or safely on a deck or patio where there’s no risk of contamination or misidentification.

Favorite Edible Flowers

There are surprising blooms that can be tasty accents to your favorite dishes. For the best flavor and freshness, harvest blooms at their peak early in the day. Younger and older blooms or blooms of different sizes often have subtly different flavors, so be sure to experiment to find your favorites.

Bee Balm (Monarda didyma) – Tea-like flavor, flowers in white, pink, red and lavender
Borage (Borago officinalis) – Cucumber-like taste, flowers in lavender, purple and blue
Calendula (Calendula officianalis) – Peppery taste, flowers in yellow, orange and gold
Chive (Allium schoenoprasum) – Onion flavor, flowers in white, pink and lavender
Nasturtium (Tropaloum majus) – Peppery flavor, flowers in white, yellow, orange and red
Pineapple Sage (Salvia eleagans) – Sage flavor with pineapple undertones, flowers in scarlet
Pinks (Dianthus spp.) – Clove-like flavor, flowers in white, pink and red
Red Clover (Trifolium pretense) – Sweet tasting, flowers in pink and red
Signet Marigold (Tagetes tenufolia) – Citrus taste, flowers in white, yellow, gold and red
Viola or Pansy (Viola spp.) – Sweet flavor, flowers in a multitude of colors

Not sure which recipes to try? Flowers make surprising accents to salads or garnishes for cakes, cookies and ice creams. Add flower petals to a favorite drink, or freeze blooms in ice cubes for colorful cooling. There are even recipes available for sauces, salsas, marinades and more, all with more taste and color thanks to edible flowers. Bon appétit!

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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