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HortusScope for March 2014

Here’s HortusScope for March 2014, a checklist of garden and nature related events compiled as a public service by Wendy Ford of Landscape Fancies. Please click on the link below to download your copy.

HortusScope March 2014

Snow-smothered and light-deprived perennials

Cinnamon Snow hellebore. (C) Jo Ellen Meyers Sharp

Granted, snow is nature’s best insulator, but some gardeners are wondering about the perennials that retain their leaves through winter.

Coral bells (Heuchera), hellebores (Helleborus), thyme (Thymus) and some of the ground cover sedums, such as ‘Angelina’ (S. rupestre), have spent weeks under several inches of snow, deprived of light.

Gardeners are nothing if not optimistic. Once the snow melts and spring rains subside, snip off any brown or damaged leaves, or in the case of sedums, the stems.

Hellebore flowers are a lot showier when winter-damaged leaves are cut off. Coral bells tend to be heaved from the ground in winter, so gently push the plants back into the soil. Avoid walking on wet soil, though. Doing so compacts the soil, making it harder for roots to thrive.

Don’t be alarmed if the tips of some of the emerged leaves of tulips, daffodils and other spring bulbs are a bit yellow after the snow melts. They will likely green up once exposed to light.

Finding Plants

L.F. of Indianapolis emailed me in search of a tall, blue, late-blooming campanula named ‘Border Blues’ (C. lactiflora). She was looking for the perennial plant or seeds and wanted a local source, but we could not find any. Even online, this plant, a Darwin Perennials introduction from Ball Horticulture, could not be found from a retailer who would ship to Indiana.

“I know it seems silly to try to get a specific plant when so many others are available, but, well, you know gardeners!” she wrote.

So, what’s a gardener to do? First, check with your independent garden center, where staffers will try and locate a plant. If it can’t be found this year, ask the garden center to find it for next year or to order it specifically grown.

Many garden center employees attend a couple of trade shows each summer: OFA in Columbus, Ohio, in July, and Independent Garden Center Show in Chicago in August. These huge shows have dozens of new plant introductions amid thousands of products and services on display. Try to reach out to garden centers about the plant(s) you can’t find before the shows, so employees can be on the lookout.

Sometimes, the plants will not be available locally, so look online. There are many reputable online plant retailers. Usually you can search a site or peruse a catalog online for specific plants or seeds.

 

Design tips to create inviting spaces in the landscape

Mature trees are the ceiling, hydrangeas and small shrubs form the walls and ferns, hostas and other shade-loving perennials carpet the floor of an intimate seating area under a pergola in a woodland garden along the White River. A yellow-blooming trumpet vine colors the ceiling and provides shade. The pergola sits on a gravel bed that connects to a gravel path. © Photo Debbie Clark

If you struggle with getting good design in your landscape, develop a relationship with the space, the plants and the natural rhythm of the seasons.

That’s the advice from noted author and garden designer C. Colston Burrell, who spoke recently at the Emily N. Daniels Horticulture Symposium at the Indianapolis Museum of Art.

The goal is to create inviting, intimate spaces, whether your landscape is large or small. Here are some of his suggestions.

Integrate indoor and outdoor spaces. For instance, consider the view from your windows. What you see looking out the window is probably more important than what a passersby sees from the street.

Allow easy access from the house to the garden, where you’ll find several comfortable places to sit or dine, said Burrell, who received the Award of Distinction from the Association of Professional Landscape Designers in 2008 for his work promoting sustainable gardening practices.

Match hardscape with the materials of the house. Mid-century modern homes could use concrete or pea gravel while other periods might call for brick, stone or wood hardscape.

Select plants with multiple seasons of interest. Think about the architecture of plants, their foliage, flowers, seasonal interests, berries and bark. Place plants where you can enjoy their seasonal characteristics. Consider what you see out your windows in winter.

Use design elements of the house as a guide. Say you have a nicely arched front door or entryway. Echo that form in a similar shaped piece of furniture or plant placed in the area.

Let the structure of nature be a model. Nature has multiple layers, so emulate them in the landscape for a natural look and feel. The canopy of trees forms the ceiling, shrubs the wall and low-growing plants, the floor.

Employing the design of nature allows us to create rooms or intimate spaces where we can escape the stresses of the day, enjoy a dinner or a glass of wine.

Lastly, he said, remember nature’s food web:

• Integrate landscape structure with the environment.

• Layer plantings.

• Plant lot line to lot line.

• Establish a matrix with regionally native plants.

• Establish a fauna feeding hierarchy through native plant diversity.

• Reduce or eliminate pesticide use.

Spring Garden Clinic

The Marion County Master Gardener Spring Garden Clinic will be 9 a.m. to 3 p.m., March 1 at St. Luke Methodist Church, 100 W. 86th Street, Indianapolis. Download the registration form. Or, call  (317) 275-9286 or email dschelsk@purdue.edu.

 

Be a citizen scientist and participate in the Great Back Yard Bird Count

Indiana’s state bird, the northern cardinal, was the most reported in the 2013 Great Backyard Bird Count. © Steve Byland/iStockphoto.com

Celebrate Valentine’s Day by showing your love of birds.

The 17th annual Great Backyard Bird Count will be Feb. 14 through 17. Last year was the first for worldwide reporting and nearly 135,000 lists were submitted, including 2,040 from Hoosiers.

Once a year, citizen scientists join the Cornell Lab of Ornithology, National Audubon Society and Bird Studies Canada to tally the birds they see and enter the results on line. Among North American birds, the northern cardinal registered the most sightings at 46,991 in 2013.

You don’t have to be an expert to participate. Regular everyday people play a vital role in these ongoing initiatives to learn more about birds, said Jim Carpenter, founder, president and chief executive officer of the Indianapolis-based Wild Birds Unlimited with 280 stores, and a sponsor of the four-day event.

Bird populations are dynamic, making it impossible for scientists on their own to observe and document avian activity. This is why individuals are key, he said.

Here are some tips:

  • Download the bird list for your area at birdsource.org by plugging in your ZIP Code. There’s also a video that walks explains the process and a downloadable step-by-step guide.
  • For 15 minutes at least once during the four-day event, count the type and number of birds you see in one location, such as a bird feeder, tree or shrub. You can count as many times a day, for as many days as you like, for longer than 15 minutes and in different locations, such as a park. Just use a fresh checklist for each location, time and count, said Don Gorney, former president of Amos Butler Audubon.
  • Record the most of any species that you see at one time. For instance, during 15 minutes of watching a bird feeder, you see a male and female cardinal and four chickadees. Then you see two male cardinals and three chickadees. So, you would report: two male cardinals, one female cardinal and four chickadees for that period, Gorney said.

Just in case you need some help, in January, Cornell released Merlin, a free iPhone app that identifies 285 North American birds. An Android version should be out this spring.

 

You Can Grow That! February 2014: Sketch your plant desires

 

Make a sketch of the garden before ordering plants. © Jo Ellen Meyers Sharp

This time of year is one of the most tempting for gardeners.

Most of the mail order catalogs have arrived and daily, we get e-mails offering seeds for delectable vegetables, plants for the cutting garden, the latest tool and attractive garden accessories. If you’re like me, you want everything in sight.

But before we place an order, sketch out a few things.

  • Determine the dimensions of the area you want to plant and make a sketch. It doesn’t have to be fancy or drawn to scale. It will serve as a planting guide before digging in the garden. This information helps you determine how many plants to grow there and their size.
  • Is the area in full sun, shade or somewhere in between? In summer, does the soil tend to stay wet, seem excessively dry or average? This knowledge will help you select plants that will tolerate the particular conditions of your site.
  • Decide how much work you want to put in the garden. Some plants, such as tea roses, can be a lot more work than other plants.

When you order from mail order or Internet garden retailers, the plants will come in pots, cell packs or bare-rooted, wrapped in paper, peat moss or plastic. Plants will be shipped at a time appropriate for planting. For the best results, read and follow the planting instructions that come with the plants. Get the plants in the ground as soon as possible after arrival. If you can’t, you can hold them longer by potting up plants in quart or gallon size nursery pots filled with a high quality potting mix. Transplant from the pots to the ground when you are ready.

Mail order or online garden retailers have a wide selection of seeds and plants. However, there are risks. Weather that is too hot or too cold during shipping can damage plants. You are buying sight unseen and can’t always tell the size of the plant you will receive. What looks large in a photo may arrive in a 2-inch pot. Keep a detailed copy of your order and any plant guarantees.

Before ordering, ask neighbors, friends, family, coworkers and other gardeners if they’ve had experience with an online or mailorder catalog retailer. Also, check out Dave’s Garden for its vast repository of consumer comments and ratings on hundreds of garden catalogs and online retailers.

 

Smaller Garden — Bigger Impact at 2014 Emily N. Daniels Horticulture Symposium Feb. 6, 2014

February 6, 2014
8:00 AMto4:00 PM

A pot of herbs is one way to make the most out of small-space gardens. Learn more about Smaller Garden — Bigger Impact at the 2nd annual Emily N. Daniels Horticulture Symposium at the Indianapolis Museum of Art. © Jo Ellen Meyers Sharp

In today’s gardening world, less can definitely be more. The Indianapolis Museum of Art’s daylong horticulture symposium, Smaller Garden — Bigger Impact, will bring together regional and national experts to discuss the challenges and joys of gardening in smaller spaces.

Suitable for the novice gardener as well as the professional designer, topics will include: plant selection ranging from moderately sized woodies to abundantly prolific fruits and vegetables, intriguing perennials to liven up any garden or patio, and special design considerations for these new spaces.

Speakers will be: C. Colston Burrell, Lee Reich, Jo Ellen Meyers Sharp and Vincent Simeone. A wide selection of relevant gardening books will be available for purchase, as well as ample opportunity for one-on-one conversation with the speakers and IMA Horticulture staff.

Sponsored in part by the IMA Horticultural Society, the 2nd annual Emily N. Daniels Horticulture Symposium will be 8 a.m. to 4:30 p.m., Thursday, Feb. 6, 2014 at The Toby. Register today!

 

 

 

February garden checklist

Indoors

  • Keep houseplants close to bright windows. Check soil for dryness before watering.
  • Examine produce, tender flower bulbs and roots stored for the winter for rot, shriveling or excess moisture. Remove and discard damaged material.
  • Sketch garden plans, including what to grow, spacing, arrangement and number of plants needed.
  • Order seeds and plants as early as possible for best selection.
  • Renees Garden SeedTest left over garden seed for germination. Place 10 seeds between moist paper toweling, or cover with a thin layer of soil. Keep seeds warm and moist. If fewer than six seeds germinate, buy fresh seed.
  • Wash pots and trays that will be used for seed sowing and transplants.
  • Start seeds for cool-season vegetables, such as broccoli, Brussels sprouts, cauliflower and cabbage, five to seven weeks before transplanting outdoors.
  • Start seeds for impatiens, begonia, geranium and other slow growing annuals.

General Landscape

  • Prune landscape plants except early spring bloomers, which should be pruned within a month after the have finished blooming. Birches, maples, dogwoods and other heavy sap bleeders can be pruned in early summer.
  • Repair or build trellis for roses, grapes and other vining plants as needed.
  • Fertilize spring-flowering bulbs as they break ground.
  • Prepare lawn and garden equipment for the upcoming growing season. Sharpen blades and have equipment serviced before the spring rush.

Vegetables and Fruits

Groundhog Day prognostications for gardeners

Versatile window boxes can be planted for the season. © iStockphoto.com/Jorge Antonio

In honor of Groundhog Day, this might be a good time to review what some of the green prognostications for 2014.

Window boxes. What better way to get a little flower and color when you have a small garden, apartment or condo? If you can have only one, mount it at a window you look out often, such as at the kitchen sink.

Cable ties can be used to affix a window box to a railing on a balcony or around a deck or porch. If you can’t attach it outside, consider using the box at a sunny, indoor window.

If you can't put a window outside, put it indoors. Photo courtesy of Anthony Tesselaar.

For spring, buy potted tulips and daffodils to plop in the window box. Tuck in a few pansies, nasturtiums, forget-me-nots or sedums. Change out the window box for the seasons with summer annuals or perennials; cool-season snapdragons, osteospermum, ornamental grasses or pansies for fall; and fresh greens, colorful branches and dried flowers or seed heads for winter.

The industry should do its best to cater this demand with compact trees and plants, and drought tolerant species for wind-blown balconies, said Anthony Tesselaar, who has introduced many plants, including Tropicanna cannas, Flower Carpet roses and Bonfire begonias.

Food plants. Pretty ones, such as the dwarf, yet prolific, blueberries and raspberries, specially bred for growing in all-weather pots are terrific. Growing food in containers will continue to be popular for those with small space gardens or limited sun. Lightweight containers are easiest to work with, including Smart Pots, which are made of spun recycled materials, and are easily stowed off-season.

“I believe growing your own is driven more by the notion of taking control over the food you put in your mouth and, more importantly, the mouth of your child,” Tesselaar said “And how much people are actually harvesting is irrelevant because any success, however small – is incredibly rewarding.”

Children. No, we aren’t going to eat them, but rather, teach them where food comes from. Tesselaar and others recommend growing food kids will like, such as strawberries instead of radishes, and giving them their own plot or pot. Food gardening also can be used to teach other skills, such as math, geography, ecology and history.

How will our plants weather the weather?

You know how we talk about winter hardiness and USDA Zones? The recent polar vortex provided an extreme test for many of our perennials, shrubs and trees. 

The current USDA Plant Hardiness Zone Map places most of central Indiana in Zone 6a, where the extreme low temperature is minus 10. The old map had central Indiana in USDA Zone 5b, with the extreme low of minus 15 degrees. We were colder than either of those.

We can be grateful that we had snow on the ground when the big freeze hit. Snow is one of nature’s best insulators. It protects the roots of plants.

It will be spring before we know what plants were damaged by the extreme cold and wind. For trees and shrubs, we might see few or no leaves and some branch dieback on trees and shrubs. Perennials may not show up because the cold weather did them in.

Leftover spring bulbs

With the clean up from the holidays, you may have uncovered a bag of spring-blooming bulbs. I’ll admit that this has happened to me more times than I care to count.

Unfortunately, it’s too late to plant them in the ground.

I still had a bag of 25 tulips, so I potted them up in a large, all-weather container. I dug down about 6 inches, placed the tulips, covered them with soil and topped it off with a 2-inch layer of leaves for just a bit more insulation.

The pot is outdoors, subject to the polar vortex and whatever else nature throws at it. So far, the squirrels, which have been very active this winter, have not discovered the pot of tulips.

Try this with your own all-weather container if its soil is not frozen. Or, if you dumped your dirt, get a bag of potting mix at the garden center. If you don’t want to leave the container planted with bulbs outdoors, stow it in an unheated garage, or the coldest place in a heated one. Move outdoors when the leaves break ground and get about an inch high.

Cheyenne Spirit coneflower delights humans and pollinators alike

‘Cheyenne Spirit’ is a seed-grown coneflower that caught everyone’s eye in the Marion County Extension and Master Gardener Demonstration Garden at the Indiana State Fairgrounds. Photo courtesy All-America Selections

The National Garden Bureau has named 2014 the Year of Echinacea to celebrate our native coneflower.

A worthy and reliable proponent of the title is last year’s All-America Selections ‘Cheyenne Spirit’, an extremely well-performing coneflower that went from seed started indoors in February to flowers in the June garden.

Because it is seed grown, this perennial coneflower has a mix of purple, pink, red and orange to pale yellow, cream and white blooms. ‘Cheyenne Spirit’ gets about 24 inches tall and 20 inches wide.

It was a spectacular show-stopper in the Marion County Extension and Master Gardener Demonstration Garden at the Indiana State Fairgrounds. Lots of visitors asked about this plant.

Gardeners have been struggling with coneflower survival for the last several years. The faster breeders and marketers brought coneflowers to the market, the poorer the plants’ performance.

These pricey perennials had weak stems, poor flower power, were susceptible to disease or did not make it through winter. Breeders have gotten the message and seem to be doing a better job of trialing their plants throughout the country for several years before putting them on the garden center bench.

Still today, though, many coneflower breeders say gardeners should not let the plant bloom its first year. It’s better to snip off buds and blooms to let the plant bulk up its roots, they say.

In my mind, that’s a hard sell. Why would we pay $15, $20 or more for plant — one with native blood, no less — and not let it bloom? Why not let the professional growers hang on to the plants until they are in their second year? Although growers may have greenhouses, holding plants for more than a year becomes a space problem and winter-maintenance headache.

I know the Chicago Botanic Garden is in the midst of evaluating coneflowers (Echinacea spp.), including many of the new introductions, but it will be a while until it is released.

Meantime, check with gardeners, garden centers and others to see which coneflowers have done well for them. Perhaps we need to modify our expectations and accept that coneflowers are not a long-lived perennial. But we need to plant them anyway, because bees, butterflies and hummingbirds love them as much as we do.