Groundcovers can replace lawns… and mowing

Is there a groundcover that doesn’t need mowing, is kid-friendly but uninhabited by critters and insects? That’s a tall order as this reader finds out…

QUESTION: “We recently moved and purchased 5 acres but we only plan on a small garden for now. I really don’t want to spend time mowing right now. Is there a short ground cover which the kids could play in?

”I am reading things about snakes, chiggers and ticks. I want my kids to be safe, yet I would like to keep the mowing to a minimum. Any suggestions?” – Linda

ANSWER: Most groundcovers will attract those unwanted elements, although they can be present even without the habitat that groundcover provides. Outside dogs and cats will help to keep the snakes at bay, but chiggers, ticks and other such critters are all around.

Any groundcover will take several years at best to fill in a large area such as you describe. There are chemicals that can be sprayed on the ground to help reduce the tick and flea population, but with children in and about the yard, you probably wouldn’t want to use it.

Here’s a compromise suggestion. Mark out a reasonably small area close to the house and seed or sod it to provide a “kid friendly” lawn. You could then put down some groundcover over much of the remaining area, so you only have to keep the kids’ play area mowed.

If you’re looking for a low-growing groundcover, you could try Wooly Thyme. It’s a fast spreading thyme with no scent or flavor, but it makes a very attractive soft carpet of hairy grayish foliage topped by bright pink flowers in summer. Wooly Thyme thrives in dry well-drained locations that receive full sun. It is a hardy evergreen that grows 2 – 5 inches high.

You could also look at Wooly’s cousin, Creeping Red Thyme, valued for its fragrant foliage and a profusion of beautiful red flowers all summer long.

Another possibility: Pennsylvania Sedge Grass, a good groundcover that could be a good choice if you have any damp shady areas under tree canopies.

But again, most groundcovers aren’t particularly suitable play areas for small children. In addition to harboring critters and insects, groundcovers can conceal rocks, stones and sharp twigs that can injure little bare feet and legs.

QUESTION: “When is the best time to plant weeping willows? I have approximately 80′ span of yard that is extremely wet and hope the willows will assist in absorbing some or most of the moisture.

“How far apart should I plant the trees? I do not have any pipes or drains nearby to worry about the roots of the trees interfering with. Also, can you suggest any other trees that would do well in very moist soil? I have a fairly good sized yard 80′ wide x 150′ deep.” – Brenda Anderson

ANSWER: You should be able to begin planting around the latter part of March. It is important to remember that the willows won’t actually absorb the moisture in the ground. It is simply that they will tolerate the damp soil. If the ground is soggy wet, it may be trial and error to get them established. Should there be a period where the soil is drier, you might try scheduling to plant at that time.

I recommend the Weeping Willow Babylonica, the best and most beautiful of the green weeping willows, in my opinion. They grow to a mature height in the 30 to 50 foot range with a spread just as wide, so they need to be spaced about 30 to 50 feet apart, and are suitable for zones 4 – 9.

There aren’t many trees that grow happily in consistently wet ground. However, true weeping willows, bald cypress, red maple, river birch, green ash, swamp oak and willow oak are known to be tolerant of moist soil. But, as I mentioned, with soggy ground, it may take several tries to get them established.

The Plant Man is here to help. Send your questions about trees, shrubs and landscaping to steve@landsteward.org and for resources and additional information, including archived columns, visit www.landsteward.org

Greenwood Nursery
www.greenwoodnursery.com

Call 811 before you dig this Spring

So you’ve decided to plant a couple of trees in your landscape this weekend. What’s the worst thing that could happen? An aching back? Blistered hands? Not even close!

How about swinging a pickaxe, hearing a clang and getting drenched with a geyser gushing from the water main you hit? Or maybe pulling back the lever on your rented Bobcat and realizing you’ve just ruptured a gas line or torn up a buried electrical cable?

It’s safe to say that any of those could pretty much ruin your weekend. You would also earn the wrath of your neighbors whose utilities were cut off until crews could repair your damage, and it’s likely you’d be responsible for the cost of repairs and possibly even open to legal consequences.

You might think that the hole you are digging for that new tree isn’t deep enough to cause a problem, but that can be a dangerous assumption. For one thing, some utilities might be closer to the surface than you imagine.

Additionally, you have to remember that tree roots can go deep and wide as the tree matures, and planting over or close to underground utilities is like burying a green time bomb that can dislodge and break lines many years in the future.

Fortunately, this is a problem that has a very simple (and free) solution.

All you have to do – BEFORE you dig – is call a single 3-digit phone number: 811. When you call 811 from anywhere in the country, your call will be routed to your local One Call Center. Local One Call Center operators will ask you for the location of your digging job and route your call to affected utility companies. Your utility companies will then send a professional locator to your location to mark your lines within a few days.

Utility companies have offered this service for many years, but with so many companies with so many phone numbers spread across the country, there was a lot of confusion and misunderstanding. Hence the start of a national one-call service and a unique phone number, 811.

Some homeowners believe the 811 service is solely for contractors but that is incorrect. Utility companies are just as happy to mark their lines for your DIY projects as for professional excavation jobs.

I should add that, even if you hire professional contractors to build that new deck or fence on your property, don’t assume they will call 811 before they begin work. I recommend that you ask the contractor if they have already done so, or you can simply call 811 yourself and tell your contractor that you’ve made the call.

Within a few days, you’ll see some little colored flags or lines of colored paint criss-crossing your land, indicating what lies beneath. Here’s what the colors indicate:

  • Red – Electric
  • Orange – Communications, Telephone/CATV
  • Blue – Potable Water
  • Green – Sewer/Drainage
  • Yellow – Gas/Petroleum Pipe Line
  • Purple – Reclaimed Water
  • White – Premark site of intended excavation

As you can see, white paint or flags are used to indicate where you or your contractors are planning to dig. It’s a very good idea to mark the dig location before the utility locator teams come out. But be sure you use only WHITE markers to avoid any confusion!

While the marker teams are looking down, you should take a few moments to look up. Overhead power and telephone lines are so much part of our lives that they almost become invisible to us.

But a tree planted under or close to an overhead power line can be a major problem. Before you plant a tree anywhere near overhead lines, double-check the possible mature height and canopy spread, and if necessary err on the side of caution and plant it a little further away.

Special thanks to Alecia White, representing The Common Ground Alliance, for reminding us that more than 256,000 underground utility lines are struck each year in the U.S. If you’d rather not be part of that statistic, simply call 811 so you’ll know what’s below before you dig.

The Plant Man is here to help. Send your questions about trees, shrubs and landscaping to steve@landsteward.org and for resources and additional information, including archived columns, visit www.landsteward.org

Greenwood Nursery
www.greenwoodnursery.com

Dramatic, colorful grasses perk up any landscape

Ornamental grasses are an easy-care way to add interest and texture to any landscape. Here are some tips about two of our favorites.

QUESTION: “A couple of years ago, I bought about 25 Karley Rose grasses to plant along the edge of a path. The plants were (and are) vigorous and healthy. During the past spring and summer, we had a lot of rain and the Karley Rose grasses got SO big they flopped over into the path.

“If we should have another wet spring and summer this year, will pruning back the grasses prevent them from getting so tall and floppy?” – Clare Oliva

ANSWER: It’s important to understand that pruning during the late spring or summer would limit the plant’s growth. Normally, the Karley Rose stands up nicely on its own. Maybe the force of the rain pressed the grass blades closer to the ground.

If you see this beginning to happen in the spring, you might try staking them or if you do decide to prune the lower areas nearer the path, cut the blades at angles to blend. Otherwise you will end up at the end of the season with lovely grass mounds with flat ended blades. Yes, I have done that before and it’s not a pretty sight. The best strategy is to cut off the foliage to 6 inches from the top of the ground in early spring before it begins its seasonal growth cycle. It will then grow into its natural shape.

Remember though, they do have a slight natural weep on some of the lower outer blades. The plumes grow straight, but can also be weighted down when there is a lot of rainfall. I have noticed this happening with the Karley Roses in my garden after a weekend of rain showers. As they dry out, they will usually pop back up.

QUESTION: “I have a question about wild grasses. I enjoy and have started a collection of different grasses. This year I added to my collection a Karl Foerster grass from my local nursery.

In years past, I would cut down my other grass in early spring and I have great success with them each year. I am not sure what to do with this newer variety. Do I cut back the flowering stems and grass, or just the stems producing the flower of the Karl Foerster grass? – Wayne

ANSWER: There’s no need for any special treatment, Wayne. The Karl Foerster grass (sometimes called Karl Forester) should be cared for just like other ornamental grasses by cutting it back close to the ground in early spring before it begins to sprout.

The two plants mentioned in the readers’ questions are among the favorite ornamental grasses for Cheryl and me.

Karl Foerster Grass (Calamagrostis x acutiflora) is a cool season ornamental grass, named to honor the German botanist and plant breeder who, in the 1920s and 1930s, turned his hometown Bornim into a Mecca for gardening enthusiasts and later bravely resisted both the Nazis and the Soviet occupiers in East Germany.

Karl Foerster is a very strong grass in that it maintains its upright position without being too rigid in appearance. Flowers appear in and at first they are loose, feathery and pinkish in color, then, through the summer, they become very narrow, gradually turning a wheaten color that lasts through the fall. Recommended for zones 4 – 9.

Karley Rose Grass (Pennisetum orientale) is a warm season grass for zones 5 – 9. The green foliage is topped with long-blooming (June till frost) rose lavender plumes. I planted two Karley Rose Grass’ on a berm we have in the garden, on either side of a green lace leaf Japanese maple. The texture and pink plumes really offset the green lace foliage of the maple.

Cool season grasses generally begin to grow earlier in the season and do well in cooler temperatures. When rainfall is scarce or temperatures are high, cool season grasses need more frequent watering. Warm season grasses handle hot weather and limited moisture quite well and can retain an attractive appearance without a lot of watering on your part.

The Plant Man is here to help. Send your questions about trees, shrubs and landscaping to steve@landsteward.org and for resources and additional information, including archived columns, visit www.landsteward.org

Greenwood Nursery
www.greenwoodnursery.com

Lavender brings fragrant history to your garden

Today we’ll take a look at a very old plant with a long and storied history, but one that deserves a fragrant place in your garden.

Lavender was definitely familiar to early Pilgrims arriving in America in the 1600s, and no doubt it helped to mask some of the less pleasant odors during their long sea voyages. But growing and using lavender goes back much further than that.

The word lavender has its origin in the Latin word “lavare” meaning to wash and has many connections with the concept of cleansing. The ancient Phoenicians used lavender in their bath water and as an air freshener. Greeks were said to anoint their feet with lavender oil, no doubt as an early odor eater!

Egyptians were big fans of lavender and evidence has been found in excavated tombs to show that they used it as part of the mummification process. Wealthy Egyptians would wear a compress on their heads, made of lavender that would create a pleasant perfume as it warmed with their body heat.

Lavender has also been used for many hundreds of years as a healing and calming herb. Roman texts describe its use in treating everything from insect bites to stomach and kidney ailments. Queen Elizabeth I is said to have drank lavender tea to treat migraine headaches and that popularized the rapid growth of lavender farms in England.

Growing lavender in the USA is not difficult and will reward you with the delightful sight and smell of this revered plant, even if you don’t plan to anoint your feet with its oil. However, note that lavender will NOT grow in highly humid areas such as south Florida. If you live in USDA zone 5 or further north, you probably won’t get a lush thick lavender hedge as you would in more temperate areas, but lavender is a hardy perennial and will bloom anew in the spring.

If you’d like to see a brief video that Cheryl made with tips for growing lavender, you can find it on YouTube at http://www.youtube.com/user/GreenwoodNursery

Ready to enjoy your own lavender? Try these…

Lavender du Provence

A beautiful addition to any garden path, container, or border plant, it has a strong fragrance and is long blooming. The Provence Lavender is a Lavandin variety which refers to the hybrid lavenders commonly grown in France and cultivated for the oil and dry buds. A wonderful attraction for bees, butterflies and hummingbirds,.the du Provence Lavender has pale blue to purple blooms, growing to two foot with a two foot spread. Zones 6 to 9.

Lavender Grosso

The most fragrant of all the lavenders, Grosso Lavender is a hybrid variety commonly grown in France and used in scenting perfumes and making sachets. An abundance of long spikes of deep violet flowers standing well above the grey/green compact foliage makes the Grosso a remarkable addition to any garden. Additionally, the Grosso is the most cold-hardy of the French hybrid lavenders. Zones 6 to 9.

Lavender Hidcote Blue

If you’re looking for a lower-growing lavender variety, try this one. Hidcote Blue, a.k.a. lavender angustifolia, is a free flowering dwarf variety that produces deep purple flower spikes in late spring and summer. Lavender Hidcote Blue is great for a dwarf hedge, edging or for massing. As a famous English Lavender, the Hidcote’s blooms are distilled to provide one of the purest lavender scents. Zones 5 to 10.

Lavender Munstead

Munstead is a many-branched, somewhat woody, perennial that grows much like a small shrub. The narrow leaves of the Lavender Munstead are about 2 inches long and have a pleasing grey-green color. Munstead Lavender has small, heavily fragrant lavender flowers on long-stemmed, slender spikes. As a favorite English Lavender, the Munstead is a top choice for the edible buds. Zones 5 to 9.

Lavender grows best in rocky, dry, sunny places with an abundant amount of lime in the soil. The scent is strongest in dry, sunny locations. You can cut faded whole flower spikes when the first flowers begin to open, and then dry them for use in sachets in the home.

Cheryl and I love the calming aroma of lavender that surrounds us as we work in our garden. We think you will, too.

The Plant Man is here to help. Send your questions about trees, shrubs and landscaping to steve@landsteward.org and for resources and additional information, including archived columns, visit www.landsteward.org

Greenwood Nursery
www.greenwoodnursery.com

Bring “four season” color to your garden

What element is the first to strike you when you look at a garden, yours or someone else’s? Quite probably the answer is “color.”

On the other hand, a landscape devoid of color seems dull and lifeless. For months on end, some gardens are little more than a sea of green, or in winter, brown sticks.

It doesn’t have to be that way. With some forethought, you can create a landscape where colors abound and transition from season to season, even winter.

Today, let’s take a look at plants (some of which might be new to you) that can surround you with colors from serene to eye-popping, whatever the calendar says.

Spring

Heuchera Peach Flambe

The peachiest way to enter into spring! You will brighten the neighborhood when its bright peachy yellow leaves unfurl in early spring to turn into redder shades of peach as the summer progresses. They display white flowers on 16 inch spikes and the leaves are almost burgundy by fall. Zones 4 – 9.

Magnolia Butterflies

An upright, pyramidal tree, reaching 30 feet at maturity, it produces beautiful yellow, fragrant flowers (3 to 4 inches) during early to mid spring. The bright yellow blooms on this magnolia give the appearance of yellow butterflies welcoming spring. Zones 5 – 9.

Forsythia Show Off

Forsythia Show Off is a standout with large, bright yellow flowers that adorn the plant from head to foot. Show Off has attractive dark green foliage, unlike any other Forsythia, that adds season-long interest. Zones 5 – 7.

Transitioning from spring into summer, you can’t go wrong with:

Dianthus Firewitch

A compact species, perfect for a rock garden but used in mass creates a stunning effect. The Firewitch is an intense, spicy-scented plant with a mat of hot-pink to magenta colored flowers with small white centers. The fragrance comes from the flowers that bloom from mid-spring through early summer. Zones 3 – 8.

Summer

Crape Myrtle Dynamite

Cheryl and I think Dynamite is the most amazing Crape Myrtle we’ve ever seen. The bright red blooms on the Dynamite are in giant clusters all over this tree. It displays smooth tan bark, dark green foliage and a beautiful fiery orange fall color. Zones 6 – 9.

Monarda Fire Ball

When it comes to summer color, this should be on your list! A mid-summer heavy bloomer with showy, aromatic, bright red-scarlet flowers, it is fast growing from 15 to 36 inches tall and packs a visual wallop in the garden planted in full sun or part shade.

Does well in average garden soil and attracts droves of butterflies and hummingbirds. Zones 4 – 9.

Hydrangea Incrediball

This really is an eye-popper! It produces huge 12 inch blossoms forming a massive ball. The Incrediball’s enormous blossoms vary in shades of green and cream fading to white and then to a paler green as blossoms mature. Once the Incrediball Hydrangea begins blooming in early summer, it continues into early fall. Zones 4 – 9.

Fall

Black Eyed Susan

Yes, not exactly a rarity but you can’t go wrong with Black Eyed Susans as they’re great for mass plantings and provide wonderful contrasting colors when paired with ornamental grasses, Shasta daisies, Russian sage or dianthus. They are deer and rabbit resistant yet attract butterflies. Their gold to orange petals provide striking color through mid fall. Zones 4 – 9.

Sedum Autumn Fire

Cheryl and I have several varieties of sedum in our garden and we just love them in the fall. Sedum Autumn Fire has tighter growth habit, thicker foliage, and more brightly colored, rosy, early fall flowers than other varieties. Zones 3 – 9.

Winter

Tiarella Crow Feather

This new Tiarella has bright green leaves and is deeply marked with a black “feather”. Tiarella Crow Feather displays the best winter color of all in a brocade of pinks, reds, purples, and blacks. Tiarella Crow Feather sports pink flower stalks and is a strong grower. Zones 4 – 9.

Nandina Dwarf Firepower

A bright compact evergreen with lime green leaves and superior fire red color in the fall and winter. Plant Nandina Dwarf Firepower as a single specimen in smaller gardens and courtyards, where its color provides a focal point or accent. It is an ideal plant for spas in small urban backyard gardens and may also be planted in pots. Zones 6 – 10.

Yes, you CAN have color all year!

The Plant Man is here to help. Send your questions about trees, shrubs and landscaping to steve@landsteward.org and for resources and additional information, including archived columns, visit www.landsteward.org

Greenwood Nursery
www.greenwoodnursery.com