|May 19, 2012|
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Ok, native plant lovers…Carolyn Harstad will be in Indianapolis to speak at 1 p.m. Saturday, May 19, 2012. Carolyn is the author of “Go Native: Gardening With Native Plants and Wildflowers in the Lower Midwest” and “Got Shade? A Take It Easy Approach for Today’s Gardener” Her talk at Irvington Community School, 6040 East Pleasant Run Parkway, South Drive, will be on gardening with native plants. Sponsored by the Irvington Garden Club and Bookmamas, admission is free. Carolyn, a co-founder of the Indiana Native Plant and Wildflower Society, and her husband, Peter Harstad, former head of the Indiana Historical Society, moved to Minnesota several years ago.
(C) Jo Ellen Meyers Sharp
Sustainable landscaping can be a challenge, especially when you consider reduce, reuse, recycle.
Each year the garden industry puts plants in more than 2 million pounds of plastic pots. The pots are usually No. 2, 5 or 6 plastic, which can be recycled through many curbside programs. Some garden centers allow you to return pots as part of a recycling program, so ask what’s available where you shop.
Check with schools with garden or horticulture programs to see if they accept pots for their growing projects. The first Saturday in October, the Indianapolis Museum of Art Greenhouse accepts clean pots for reuse in its operation.
Many avid gardeners also reuse these containers. Four-inch pots are perfect for starting seeds, growing seedlings or for propagating plant cuttings. These also are a good size for holding pencils, pens and plant tags.
One-gallon pots or larger work well for holding transplants or plant divisions until ready to plant. These pots also are handy for taking plants with you when you move from one home to another or to share with friends.
Three gallon or larger nursery pots can be filled with potting mix and planted with tomatoes, peppers, herbs and other vegetables, herbs or small, fruit-bearing shrubs, such as blueberry. The nursery pots usually are black and not wholly unattractive, making them usable for ornamental plants, too, such as annuals or small shrubs, such as a rose.
These larger pots are handy for stowing hand tools, gloves, plant tags, twine and other garden essentials. Nursery pots make a useful receptacle when weeding or cutting back plants.
As far as reduce, some growers have started providing pots made of papier-mache, plant fibers called coir, paper or other biodegradable materials. These pots decompose, so they can be planted with plants in them. Or, the plants can be removed and planted and the pots tossed in the compost pile, where they will break down.
Electric Lime coral bells were among plants damaged in the Hoosier Gardener's garden. (C) Jo Ellen Meyers Sharp
Even though this past winter was hardly noticeable and spring has raged between 80-degree and 29-degree days, the best time to plant warm season plants is May 10.
Most of what we eat are warm season crops: tomatoes, peppers, squash, cucumbers, beans, corn, eggplant, sweet potatoes and melon.
If you feel like you must plant something, go for cool season crops. These include cauliflower, cabbage, broccoli, peas, lettuces, radishes, potatoes, collards and Brussels sprouts. These can be planted in March and April.
Basil and rosemary are frost tender, but parsley, sage, thyme and oregano can be planted early
Among annual flowers, warm season plants include geraniums, impatiens, petunias, salvias, coleus, zinnias and begonias. May 10 is best for planting these.
Osteospurmums, pansies, California poppies, larkspur and bachelor buttons are annuals that can take a bit of spring chill.
The summer-like temperatures have pushed growth on almost everything in the garden. The plunge back to the 20s more than likely took a toll on several perennials, shrubs and fruit trees.
If coral bells (Heuchera) got nipped, just snip off the damaged leaves. New leaves will flush out over the next few weeks. The foliage on late blooming bulbs, such as giant allium, also took a hit, but the flower buds seem fine. Don’t remove the damaged bulb foliage until it turns yellow or brown and falls flat.
Some ground covers, such as pachysandra, myrtle and ivy also may have been zapped. Cut back damaged pachysandra because the dead parts may contribute to disease. Other ground covers will out grow the damage.
Big leaf hydrangeas likely lost their flower power with the April frosts and freezes. (C) Jo Ellen Meyers Sharp
All those lovely, finicky big leaf hydrangeas (H. macrophylla) that came through our mild winter unscathed probably will not fulfill our expectations of lush pink or blue blooms. Temps in the 20s took a toll on them, too. I suggest waiting a few weeks to see if any flower buds show up. If not, but them back as needed in early summer.
|April 24, 2012|
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The Hoosier Gardener takes you on a visual stroll through a collection of some of the best annuals, tropicals, bulbs, perennials, shrubs and trees that make a statement by their leaves. Please register for this program.
From Rosie Lerner, Purdue University Consumer Horticulturist
Magnolia flower freeze damage. Photo courtesy Purdue University.
As most gardeners have marveled, we’re having one of the earliest “spring” seasons this year, with woody plants herbaceous perennials three to six weeks ahead of “normal.”
And then, perhaps inevitably, “normal” spring frost and freeze visited. Being so much further along in their development, plants are quite vulnerable to damage.
Note that freeze incidents are normal for this time of year. What is abnormal is the earliness of development, leaving the plants exceptionally vulnerable to freeze.
The good news is that woody plants, in most cases, will outgrow the damage.
Oak leaf freeze damage. Photo courtesy Purdue University.
Home fruit-growers have reason to be concerned: At 28 F, you can expect a 10-percent loss of flowers and young developing fruit. However, at 25 degrees F, that loss increases to 90 percent! In the Lafayette area, the temps hit 27 to 28 degrees F the morning of April 12, followed by 24 to 25 degrees F the morning of April 13 — a double whammy.
Bud counts were exceptionally high until the freeze, so in some cases, even just 10 percent retained fruit might still be a decent crop on our tree fruits. Grapes may also still have ability to crop on shoots that have yet to emerge. Strawberries are a bit easier to protect through frost and freeze, but only if you took measures, such as using floating row covers, recovering with straw, etc.
However, it is only mid April, and additional frosts and freezes are still possible.
Bottom line is that unless it is already a complete loss, you won’t really know the rest of the story for quite a few more weeks.
Peach bud freeze injury. Photo courtesy Purdue University
It is easy to check fruit buds for damage by cutting open the bud and looking for dark brown or black centers. Purdue Extension fruit specialists put together these videos to help you assess the spring freeze damage on:
For ornamental trees and shrubs, plant response has been quite varied, depending on species, location and, of course, temperature and duration of that temperature.
Susceptible plants may have wilted leaves, brown or black necrotic spots on leaves, or perhaps dieback of entire twigs. Plants that were in bloom likely have brown petals or dropped flowers entirely. Here are some links to articles from previous spring freezes that will give more information.
Symptoms of Late Frost Injury
Spring Freeze Injury
Allspice flower (Calycanthus florida). (C) Jo Ellen Meyers Sharp
Last Saturday was my first day back at the garden center, where I quit last summer. Maybe we both needed a break, because I was invited back to work a few months during the peak season and I accepted.
That day, my first customer had drawn a sketch of his garden and had a plant list. He also was carrying around The Indiana Gardener’s Guide. I eventually told him I wrote the book. After that, he really opened up and asked me many questions. He bought several plants.
Amsonia tabernaemontana. (C) Jo Ellen Meyers Sharp
A young woman who recently moved here from Maine also was looking for plants for her new garden. She also had many questions, especially about how to screen an area of her yard from unwanted views. Initially, she asked about fast growing trees. I recommended using shrubs, such as leatherleaf or burkwood viburnums and why. She did not buy plants, but I feel like she’ll be back.
And, there were two women from southern Indiana and Louisville who had taken a snip off a plant where they had a meeting. They brought it in and I was able to identify it as eastern blue star (Amsonia tabernaemontana).
Each commented on how great it was to find someone who knows about plants and can answer questions. It made me feel good about the value I bring to this garden center and to gardening in general. My goal is always to help people succeed. When they succeed, we all succeed.
In the garden:
Firefly silene. (C) Jo Ellen Meyers Sharp
‘Firefly’ Silene (S. dioica) came a few years ago from Blooms of Bressingham and it is one of the earliest blooming perennials I have. It’s about 20 inches tall and will get about that wide, planted in full sun. Great for cut flowers, too.
May Night salvia (S. x sylvestris) is blooming beautifully this year, grateful that the Knock Out Rose that blocked a lot of the perennial’s light, is gone.
Cool Wave pansies. (C) Jo Ellen Meyers Sharp
The Cool Wave pansies from Ball Horticulture have weathered the weather with great stamina. They are beaming.
Soon, the blue balls on the big alliums (Allium) will unfurl, about a month early, just like about everything else. The leaves of the bulbs got nipped a bit by a couple of 20+ degree nights. The bulbs are a gift from May Dreams Gardens, the host for Garden Bloggers’ Bloom Day.
And, the ‘Electric Lime’ Heuchera also got nipped by the freeze. For this plant, I will snip off the damage leaves.
Frost-tinged heuchera 'Electric Lime'. (C) Jo Ellen Meyers Sharp
One of my proudest successes is a native maidenhair fern (Adiantum pedatum), which spent the gosh-awful hot summer in a gallon pot before being planted to the ground last fall. A very sweet customer at the garden center brought me a clump from her yard last summer when she heard me say how I’d not been able to find any in the trade.
Two more Blooms of Bressingham plants earn high marks this time of year — ‘Amethyst in Snow’ and ‘Amethyst Dream’ Centaurea are in full bloom. These are great cut flowers, that’s for sure. And although a bit of a vigorous grower, it is easy to control.
The sweet woodruff (Galium odorata) is beginning to bloom. This is a great little under used ground cover for shadier areas with average to slightly moist soil.
Spanish bluebells (Hyacinthoides hispanica) are among the last blooming spring bulbs, making them a lovely surprise just when you think season is over.
Spanish bluebells. (C) Jo Ellen Meyers Sharp
Lilies of all types are poisonous to cats, including the beautiful white Eastern lilies we got for the holiday.
Eating just one or two flower petals or leaves can trigger kidney failure and frequently death in cats within a few days. Cats also can be poisoned if they lick pollen-laden paws. If you think your cat has ingested any part of a lily (Lilium), contact your veterinarian immediately.
Beside Easter lily, the family includes tiger lily, rubrum, Asian, Oriental, Martagon and species. Although a different species, daylilies (Hemerocallis) also are poisonous to cats. Calla lilies (Zantedeschia) are not.
City Gardener Program
If you’ve just moved into your first house with a yard and you are unsure of what to do with the lawn, trees and, oh, you might like to have a vegetable or flower garden, then the City Gardener Program is for you.
The Purdue Extension-Marion County City Gardener Program was developed in 2002 for new or inexperienced gardeners. It covers a variety of gardening topics and has a focus on gardening in urban areas.
The 2012 program, which began April 11, offers six Wednesday classes, and you can attend as many as you like. A certificate is awarded to those who attend all six.
Here’s the schedule and topics for the remaining sessions: April 18, Vegetable Gardening Basics; April 25, Pests and Pest Management; May 2, Growing Flowers; May 16, Grass Selection; and May 23, Tree and Shrub Planting. April 11 covered How Plants Grow.
Each class will be 6:15 to 8:15 p.m. at the Marion County Extension office, Discovery Hall, Suite 201, Indiana State Fairgrounds, 1201 E. 38th Street. The fee is $5 per session or $20 for the six classes. You do not have to pay to park to attend these classes.
For more information or to register, visit the Website or contact Debbie Schelske, firstname.lastname@example.org, (317) 275-9286.
Spring bulbs are just one of the ingredients for a fragrant season. (C) Jo Ellen Meyers Sharp
It’s easy to understand how the phrase ‘spring is in the air’ came to be.
You can smell it. From the spring bulbs to viburnums, lilacs and Cheddar pinks, the air is filled with fragrance for weeks.
You can see it. Spring flowers not only scent the air, they dazzle the eyes with color and texture along with the verdant greens of trees and shrubs.
You can hear it. Birds sing in the trees and bees buzz.
You can touch it and taste it. Lettuces, radishes and peas offer the first fruits of the new growing season.
Here are some spring favorites to consider for a landscape planted for the senses.
Viburnums, especially Burkwood (V. burkwoodii), Judd (V. juddii) and Koreanspice (V. carlesii) have beautiful, fragrant waxy flowers. They start out pink and turn white as they mature. Because the viburnums flower before nearby trees leaf out, the shrubs get enough light to bloom, yet tolerate a summer with filtered sun or part shade.
Mock orange (Philadelphus), sometimes called sweet mock orange, is a wonderful old-fashion shrub that deserves a place in the garden, even if its beauty lasts only for a few weeks. ‘Minnesota Snowflake’, ‘Natchez’ and ‘Dwarf Snowflake’ are good selections.
Lilacs, viburnum and fragrant spring bulbs perfume the season's air. (C) Jo Ellen Meyers Sharp
For sunny spots, plant a lilac (Syringa). The old-fashion ones with the big flower cones are favorites for their colors and fragrance. Manchurian (‘Miss Kim’) and Korean (‘Paliban’) lilacs tend to bloom a little later with smaller flowers, but they are still fragrant and seemingly immune from the powdery mildew that plagues many old-fashion types.
Plant Dutch hyacinths (Hyacinthus) and fragrant tulips (Tulipa) and daffodils (Narcissus). ‘Angelique’ and ‘Apricot Beauty’ are two wonderful, long-lasting tulip selections. For daffodils, try ‘Geranium’, ‘February Gold’ and ‘Poeticus’.
No garden? Enjoy the scent of the season with a pot of pansies (Viola x wittrockiana) or stocks (Matthiola) from the garden center for the balcony or patio.
Orchard in Bloom, an Indianapolis spring tradition, will be April 27 through 29, 2012 at Holliday Park.
The Hoosier Gardener has three pairs of tickets to be given away at a random drawing of readers who leave a comment below about Orchard in Bloom. If you have been before, share what you like. If you have never been, tell us why you would like to go. Each pair has a retail value of $20. The tickets were donated by Orchard in Bloom. Proceeds from the family friendly event support Orchard School and Holliday Park.
Jo Ellen Meyers Sharp will present Edible Landscapes each day as part of the Orchard in Bloom Symposium. Several other programs also are on the agenda, including Sara Snow’s Creating a Green Home, composting, backyard chickens, rain barrels and more.
Visitors will see beautiful landscapes created by some of the areas best landscape architects and designers. Other groups design mini-gardens that feature their favorite plants, such as hostas or native plants.
Vendors display collectibles, garden art and accessories, clothing and other merchandise. Not-for-profit groups will be on hand to distribut information about their activities.
Food and drinks are available at the show, which runs 9 a.m. to 5 p.m. Friday and Saturday and noon to 5 p.m. on Sunday.
Your comments must be posted below by 6 p.m. Friday, April 20, 2012. Comments posted on Facebook do not qualify. The drawing will be at 8 p.m. Friday, April 20, 2012. Winners will be contacted by e-mail for an address where tickets can be mailed.
Early symptom of boxwood blight. Photo courtesy Connecticut Department of Agriculture
A worrisome new fungus found on boxwoods also threatens Japanese spurge, the popular ground cover, according to Purdue University’s Plant Pest Diagnostic Laboratory.
Boxwood (Buxus) blight (Cylindrocladium pseudonaviculatum) has been confirmed in Ohio, North Carolina, Connecticut, Virginia, Maryland, Pennsylvania, New York, Rhode Island, Massachusetts and Oregon. The same fungus recently was found to cause the disease on Japanese spurge (Pachysandra terminalis). The disease was first reported late last year in Connecticut, where the disease was found on boxwoods in a residential landscape. In the other states and Canada, the blight has been found on boxwoods at nurseries and growers.
Although boxwood blight has not been found in Indiana, the Purdue plant experts recommend that property owners and landscapers be vigilant if planting new boxwoods or Japanese spurge in landscapes this spring. The Purdue lab asks to be contacted if you see symptoms on boxwoods or Japanese spurge.
“Recently, plant pathologists at the Connecticut Agricultural Experiment Station found that the fungus, which causes boxwood blight, can also cause disease on Pachysandra ground cover,” the Purdue lab reported March 19, 2012. Japanese spurge (Pachysandra terminalis) is part of the boxwood family.
The Connecticut research exposed healthy pachysandra plants to the spores of the fungus and within 10 days, lesions or small round spots developed. Three weeks after exposure, “many of the leaves with lesions yellowed and dropped,” the Purdue lab said. “This raises significant concerns about pachysandra as a potential source of (the spores) for infection of boxwood and vice versa.”
The leaf spot and dieback symptoms on the spurge may be confused with a common and widespread disease of Pachysandra, known as Volutella blight (see photo below).
Volutella blight on Japanese spurge (Pachysandra terminalis). Photo courtesy Purdue University Plant Pest Diagnostic Laboratory