Betty Ann Addison was preparing to say goodbye to her beloved, 16-acre nursery, Rice Creek Gardens, when I first met her in 2006. After 20 years, rising taxes and assessments had made running the park-like nursery she and her late husband, Charles, opened on the site of a former junkyard in Blaine a losing proposition. Her eyes were sad, but the joy she felt as she pointed out specific plants, many of which she and Charles had hybridized themselves, was obvious in the way she smiled, or sometimes laughed in that way she does, short, sweet, a cross between a squeal and a giggle. A person would have to be made of stone to not be made happy by that laugh. Hugging goodbye, she admitted that the move was hard, but things were going to be all right, she said, because “I will remember how blessed I’ve been, and I will go on living every moment and, well, isn’t that enough?”
Such a sentiment might sound hopelessly upbeat coming from someone else. But people who know Addison, who is now in her late 70s, know that she is the sort of person who has always lived every moment—and then some. Over lunch at her house in Feburary, she apologized for being tired, explaining that she had just gotten home from the gym and was feeling a bit discombobulated due to floor refinishing, kitchen updating and other house projects in the works. Still, in between bites of the chicken soup she’d made for us, she talked excitedly about the presentation she would soon be doing for the Potomac Valley Chapter of the North American Rock Garden Society in Bethesda, Maryland.
Addison is well known for her rock gardening expertise and has designed and built several public rock gardens including the Peace Garden at Lake Harriet in Minneapolis, as well as gardens in New York’s Central Park. “Rock gardening is the highest horticultural art because it incorporates so many thousands of wild and cultivated plants, combined with rocks, to make a landscape based on nature” she says. To illustrate, she tells the story of how her mother took up rock gardening in her 70s. “My mother passed away at 93 and she was a great gardener all her life. When she told me she wanted to try rock gardening, I built one for her and she said it was the best garden she ever had because every day there was something new to discover.”
For decades, Addison traveled the world with her mother, bringing home plants to try in their home gardens: hers in Minnesota and her mother’s on Long Island where Addison grew up. Sometimes the two of them brought back so many plants in their luggage, they had to send their clothes home in boxes. At a time when Minnesotans had few hardy plants to choose from, Addison’s trials and propagation of thousands of varieties of seeds from worldwide sources helped make the wider selection gardeners enjoy today possible.
Addison is a longtime propagator and breeder of hardy rhododendrons, including large-leaf rhododendrons, which were long thought to be ungrowable in this climate. Recently, she purchased an acre of land across the street from her house for testing rhododendrons and she’s looking forward to seeing some of her hybrid creations bloom this spring. On the day I visited, Addison was most concerned with the immediate need to transplant the hundreds of alpine cuttings growing in flats in the sunny, south-facing greenhouse she had built several years ago. Just a short set of stairs down from her living room, the greenhouse is the starting place for many of the plants she sells at her home-based nursery, Gardens of Rice Creek, in Fridley. The nursery is open every Saturday from 9 a.m. to 4 p.m. starting in May through Labor Day. And as she did at Rice Creek in Blaine, Addison offers an extraordinary selection of rare and unusual plants, including dwarf conifers, alpine and rock garden plants, as well as native wildflowers and rhododendrons. (For more information visit the Gardens of Rice Creek website.)Read More»
You know me: I often write about the prevalence of bad gardening advice so, hey, here I go again. This time, let’s talk about how often we gardeners hear stuff that’s either dangerous, or stupid or both. Got a tree stump you need to remove? “Pour gasoline on it,” I’ve heard more than one gardener advise. PLEASE don’t do that. Need to get rid of moles? “Stuff Juicy Fruit chewing gum in their holes,” advise ill-informed people who believe the story that the gum, lord knows how many sticks, will cause intestinal blockage. It won’t, but even if it did, don’t do this either.
And here’s another thing you ought not do—use mothballs outdoors. (Honestly, though, who wants to wear sweaters and use blankets that smell like mothballs either?) Anyway, I have no idea who first started running about telling gardeners that mothballs are great for curtailing outdoor pest problems, but the strategy has been around a long time and is still going strong, according to my latest Google search. The trouble is, though it does work, it’s a federal offense to use mothballs for an off-label reason such as animal control. And there are a lot of good reasons for that.
Regulated by the U.S. Environmental Protection Agency, mothballs are pesticides capable of harming all living things, including children and pets who may mistakenly eat them thinking they’re some kind of treat. Mothballs are also harmful to the environment because, as they deteriorate, they contaminate groundwater, soil and plants (the pesticides in mothballs bind to soil and are taken up by plants).
Labeled for use to kill moths and other pests that destroy fabric, mothballs are supposed to be used only in airtight containers. That’s because the vapor from their active ingredient, usually naphthalene or paradichlorobenzene , is toxic. As the fumes build up inside a closed container, the pesticide reaches a level that kills the moths.
When we smell the terrible stink of mothballs, however, we are the ones breathing in the pesticide fumes. And those fumes can affect our health in truly sucky ways, depending on which active ingredient the mothballs contain. Adults exposed to naphthalene or paradichlorobenzene vapors for short periods, for example, may experience nausea, dizziness, headaches and/or vomiting. Longer exposure has been linked to the development of hemolytic anemia, as well as kidney and liver damage. Naphthalene, according to the World Health Organization, may also cause cancer.
Young children exposed to mothballs containing either pesticide can develop fever, diarrhea and abdominal pain, especially if they have eaten them. Dogs who ingest naphthalene mothballs may become lethargic or experience diarrhea or tremors. Paradichlorobenzene mothballs have been linked to kidney and liver damage in pets.
If you want to learn more about the health effects of mothballs, go to the National Pesticide Information Center’s website.
So many magicsal things happen when caterpillars turn into butterflies. Recently, our neighbors Dale Hammerschmidt and Mary Arneson managed to get some great pictures of the monarch butterflies they often raise indoors to help protect them from predators. They said it was okay to share them, so here you are. Thanks Dale and Mary!
Want to grow vegetables and herbs even though you don’t have full sun? No problem. You just need to choose edibles that don’t depend on six hours or more of baking sunlight to thrive. So, yes, tomatoes are out, as are peppers, squash and eggplant, because plants grown for their fruit really do need a minimum of six hours of good sun per day.
But that still leaves a wide variety of edibles to choose from as long as you’ve got more than deep shape to work with—not much will grow under a maple tree’s canopy. But plants grown for their roots and flowers will produce with as little as three to six hours of full sun or consistent dappled sun. Beets, carrots, broccoli, cauliflower, onions, turnips and radishes, for example, can be successfully grown with four to six hours of sun. And though they produce fruit, I get a pretty good crop of cucumbers in 5 hours of sun.
Leafy veggies like kale, spinach, leaf lettuce, arugula, mustard greens and Swiss chard can get by with only two to four hours of sun—though they will grow more lush in sunnier locales. If you have a garden that offers both sun and shade, one of the advantages of knowing what can take less sun is the ability to increase your harvest by tucking these plants in along shaded borders that are often though of as wasted space.
Sure, there’s a lot to be said for the power of sun, but there are some benefits to growing vegetables in part shade. Crops like broccoli and cauliflower won’t bolt as quickly as they would in full sun, tender lettuces will last longer and you won’t have to water constantly, which is always a plus. That said, though, it is important to monitor moisture levels in shade gardens carefully because these sites are often located beneath big trees or shrubs, as well as the overhang of the house or garage. So even when it does rain, the water may not reach your garden, and much of what does fall will likely be taken up by the root systems of greedy trees and shrubs.Read More»
If I were able to retire tomorrow, one of the first things I would do is read more. I already read a lot: I love books. But I could read a lot more if I didn’t work so, fingers crossed that we win the lottery sometime soon so I can get to the stacks and stacks of books taking up space all over our house.
One of the things I did manage to do recently was catch up on the books I’ve received to review. Here are some of my favorites. First, though, you’ll notice these books are not the latest, hot-off-the-press sort of thing. I read as I’m able and review some of what I like. If I don’t like something, I take my grandma’s advice to “not say anything if I can’t say anything nice.” I figure, just because I don’t like a book doesn’t mean you won’t. Why be a spoiler?
Beautifully Sustainable: Freeing Yourself to Enjoy Your Landscape (Be-Mondo Publishing, 2013), by Douglas Owens-Pike. I met Douglas several years ago when he invited me on a mini tour of some of the Minneapolis gardens his landscape design firm, EnergyScapes, had created in recent years. All of them were lovely and different from most “designed” gardens in the sense that were very natural, consisting mostly of native plants and arranged as if Mother Nature had done it herself. True to his company’s name, the landscapes were all created with resource conservation in mind.
Beautifully Sustainable (which can be purchased here: http://energyscapes.com/book/) is Douglas’ attempt to help gardeners at all levels make their landscapes more sustainable, and his smart, clearly explained ideas and tips are very useful. But I also appreciate how on a more subtle level, his book helps readers think more like a designer when visualizing outdoor areas: What sort of space would I really enjoy? What features matter to me most? What view do I want to see from my living room?
All of these questions seem easy, and they are. But most of us don’t think of them until the patio is poured or the pergola is built in what turns out to be the totally wrong place. “Take time to imagine,” he wisely suggests, before explaining how to create a map of your landscape long before you buy the first plant. Other chapters cover things like how to build healthy soil, create a rain garden, get rid of weeds without chemicals and how to maintain a landscape once its planted. In other words, there’s something for everyone in this helpful, enjoyable book.
For those who want to learn more about growing edibles in our climate, take a look at Emily Tepe’s The Edible Landscape: Creating a Beautiful and Bountiful Garden with Vegetables, Fruits and Flowers (Voyageur, 2013). Emily was doing fruit research at the University of Minnesota when she created an edible demonstration garden and fell in love with growing food.
There are lots of things to love about Emily’s book, but in particular I appreciate the way she accompanies her advice to incorporate edibles into gardens with colorful illustrations that show exactly how that can be accomplished beautifully. While the book is a general primer on growing edibles, the appendix includes an extensive list of edible plants specifically for northern gardeners. I found several varieties there that I’m going to try this year.
Gardeners who want to help support pollinators and other beneficial insects should check out Minnesota landscape designer Heather Holm’s fantastic book, Pollinators of Native Plants (Pollination Press, 2014). While the text sometimes made me reach for my botanical dictionary and refer to the glossary in the back of the book, Heather really did a great job of conveying complex subject matter in a relatable way. Don’t want to learn about the actual process of pollination? Skip to the descriptions of the many different creatures that visit flowering plants. Read up on bees and how they live and work together. Or jump right to the bulk of the book where native plants are described in detail along with the insects that are partial to them. The photos alone are outstanding.
But the information Heather offers about natives for three distinct habitats: prairies, woodland edges and wetland edges, can be used by all gardeners who want to attract pollinators. And isn’t that all of us at this critical time?
Whew! I apologize for disappearing for so long. A family member has been ill for several months, and I haven’t had time to post. Things haven’t really calmed down, but I’m going to try to get back in the groove of writing more regularly so, here goes: Let’s talk about new plants for 2015. Or more specifically, new plants that can survive Minnesota’s horrifyingly cold, Zone 4 climate. For those of you who live where it’s even colder, I’ve got a few plants that are hardy to Zones 2 and 3. If you live in much warmer climates, you have the opposite problem. So you’ll want to check to see hot much heat the plants I’m talking about can take before you buy them.
You’re probably familiar with the U.S. Department of Agriculture’s Plant Hardiness Zones, which indicate the minimum temperatures in 11 areas across the country. By checking the USDA’s map, you can see whether a plant you’re considering can take your area’s minimum temperature. For example, in Zone 4b where I live, plants need to be hardy to at least -25° F to make it.
It’s always hard to choose just a few plants to highlight from the long list of new introductions each year. But here are some of my favorites. Before I go on, though, I want to remind you that if you are concerned about the effect of neonicotinoid pesticides on bees, you’ll need to check with sellers before you buy plants. Some retailers have stopped selling plants treated with “neonics” in response to studies suggesting that the pesticides harm bees, particularly honeybees. But this issue is still being sorted out and not everyone is on board. I’ll write more about what’s happening with neonics very soon, so without further ado, here are the plants.
Got shade? Try adding some Solomon’s seal ‘Tiger Stripes’ (Polygonatum falcatum) from Plant Delights Nursery to your garden. This variegated selection has pretty cream-colored highlights and grows to about 18 inches tall. Fruit clusters appear in the fall and plants are hardy to Zone 4. Plant Delights is located in Raleigh, N.C., and is known for offering unique plants that are hard to find elsewhere. Orders can be placed on their website.
I’ve never tried growing cobra lily (Chasmanthe Saturnus) but I’m going to try now. This South African native bulb offered by High Country Gardens blooms in mid-summer and is hardy to Zone 2. Spikes of fragrant, tubular orange flowers attract hummingbirds. Plants grow to between 3 and 4 feet tall and 2 feet wide and need full sun, which is 6 hours or more.
Toad lilies are great for our northern gardens because they bloom late in the season and look so tropical. Tricyrtis ‘Hatatogisa’ from Creek Hill Nursery is a lovely Japanese toad lily with orchid-like, purple-spotted flowers on long, arching stems. This plant is not really new, but it is being freshly promoted. Plants grow 18 to 24 inches tall and 12 inches wide and prefer part shade to full shade. Zone 4.
Looking for a tough, no-fuss rose that’s like no other? Head out to local garden centers and ask for Above and Beyond™ (Rosa ‘ZLEEltonStrack’), the newest rose from local breeder David Zlesak. David gave me this rose to test in my garden a couple of years ago, so I can attest to its hardiness and beauty. Introduced by Bailey Nurseries, Above and Beyond has apricot-colored flowers that open in mid- to late-spring and often rebloom throughout the season. Plants grow 10 to 14 feet tall and about 14 feet wide, which sounds ginormous, but you can easily prune them to be shrubs or climbers. I’ve got mine growing on a south-facing fence. Full sun. Zone 3.
I know they aren’t everyone’s cup of tea, but I like black plants. So I can’t resist suggesting Clematis recta ‘Lime Close’, also known as Serious Black™, a nod to Harry Potter fans everywhere. Unlike vining clematis, this new introduction from Walters Gardens offers dark-purple foliage that looks almost black and grows in clumps to about 6 feet tall. Foliage ages to green as the summer progresses and is topped with white flowers with slender petals. (Plan on supporting plants if they get too tall and floppy.) Walters doesn’t sell to the public, but you should be able to find this plant at garden centers. Full sun. Zone 4a.
If you like baptisia but wish plants wouldn’t flop over after they bloom in early summer, try Baptisia ‘Pink Truffles’ from Walters Gardens. One of several new varieties bred by Hans Hansen, this false indigo is compact at just 2 ½ feet tall and 3 feet wide and offers delicate, pink flowers. Plants are drought tolerant once they are established and should be grown in full sun to part shade. Zone 4.
And last but certainly not least, let me point out a really striking grass from Walters Gardens. (Again, this should be available at local garden centers.) Schizachyrium scoparium ‘Twilight Zone’ is a little bluestem that is now widely available after a limited release last year. In addition to its columnar form, this ornamental grass offers silver/purple highlights. Grows to 4 feet tall and 2 feet wide. Full sun. Zone 3.
Most of these plants should be available at garden centers this season, but in some cases you can order directly from the website I’ve provided.