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August 2000
The late Richard Needham of the Globe and Mail once claimed to be a close friend of cockroaches and viewed insecticide advertisements as hate literature. Four decades have passed since then, and that venerable sage would not have been a happy man this year. The damp earlier in the season has made
for much growth. Now comes the
reverse side: pathogens. By July,
the complaints of various pests and diseases over and above white grub were far
from few. Scale insect had been
reported on such diverse plants as Most common insect pests, including scale and aphids, are controlled by insecticidal soap. Spray late in the day (at dusk), thoroughly covering foliage, stems and especially, new growth. Several applications five days apart may be required. Mildew can be controlled by benomyl, a systemic chemical insecticide. It is expensive and also known to adversely affect earthworms. Sulphur is often touted as a “natural” control but is, at the best, more of a protectant of dubious effectiveness. Since newer, mildew-resistant phlox are available, plan to replant with these early next season. The Canadian-developed Prestonian lilacs are also mildew-resistant, as are most lilacs native to the Orient, including the highly popular dwarf Korean and Persian lilacs, as well as the Ivory Silk, a form of Japanese tree lilac, Syringa reticulata. Pesticide purveyors are crying tears with all the force of a power sprayer. Wet, cool weather has discouraged those two scourges of the summer lawn, crabgrass and chinchbug. New research and changing climate
indicates that lawns will flourish even better if they Interestingly- and to those same retailers’ horror- there are reports beginning to surface proving what many have suspected for a long time: feeding plants is not as necessary as has been claimed. We hasten to add that this does not mean stopping entirely. But there is a definite trade-off, which will be discussed in greater depth in City Gardening well before next spring brings this topic once again to the fore. A great depth, though, is just what the roots of most city trees do not extend into. In fact, most are in only the first two feet of soil. When drought occurs, trees- no less than other plants- undergo stress. This can reach critical proportions if years are hot and dry, as they were in 1998 and 1999. It never ceases to amaze that those most prone to climb on their hind legs and wail environmental disaster are among those least likely to water our harmonious hardwoods. Once every three days (unless there is a heavy rain), leave the sprinkler on for an hour in the same position. If you really want to promote root growth, and hence happy, healthy trees, consider drip irrigation. New research has indicated that this is by far the most superior watering method. “Soaker hoses” are available at most garden centres.
An Artist Draws Water The “Waterwick” was invented by Canadian artist Ron Caisley to answer the perennial problem of keeping houseplants correctly watered. Observing that specially modified clay acts as the perfect wick, he created a simple unit that can be placed inside a six-inch flowerpot. A saucer is placed under the pot and kept topped up with an inch of water. Little muss, no fuss, as the fella said. It works, and works well. Not mentioned on the package, however, is the risk inherent in bottom watering of fertilizer salt building up in the soil. Avoid this by a monthly flushing with a very heavy watering. It appears that, as yet, no other sizes are available for smaller, and especially larger pots. More information is available from Caisley Plantcare Products (1-888-928-3782) or Plant Care Solutions at www.houseplantcare.com.
Genetic Modification Did the Greeks get there first? The debate continues to rage. On this continent, as in the Third World, it has been largely accepted. In Europe, a somewhat more dog-in-the-manger attitude prevails. The dreaded Americans beat us to it, so we’ll ban it, seems to be their belief. This is more than passing strange since Greece is a major seat of social and scientific civilization. It was there that the nymph Mentha was changed into a mint plant, likewise Laura into laurel; these are but two examples of Greek penchant for what must be the most extreme GM experiments yet.
Is the Bloom of the Boom? Trends in Home Gardening Retailing In Nazi Germany of the 1930’s, one observation was that almost all of the trees planted were faster maturing, less desirable trees. This has been seen since in other totalitarian states. This being the case, urban Ontario has nothing to worry about. Tree sales to city homes boomed. Interestingly there appears to be an increasing demand for fruit trees and bushes also. What might be termed the “full-service” garden centres greeted the increasing emergence of the super-centres entering the business to “skim the cream” each spring. Rest assured, they have little to worry about. Those who are behind these scenes know and care little about the plant business. For that matter, judging by the appalling care of stock, neither does the sales help. The one major exception is Loblaws, although this is still not the place to go to seek qualified help. If the up and coming Canadian Tire continues vining ever upwards, expect them shortly to be the country’s largest “garden centre” chain. For the moment they are, unlike Loblaws, apparently unwilling to pay for professional horticulturalists. A survey from the U.S.A. has confirmed another suspicion: gardening in North America is by far and away the realm of women. Most, much to the undisguised relief of mainline garden centres, still prefer to shop at such outlets if only for natural pesticides, fertilizers and similar products largely unavailable from the competition… plus plants. The same U.S. survey indicates why gardening is the continent’s number one recreation: Relandscaping is also a major urban occupation, and no doubt this explains the jump in specialty garden and yard shops in more trendy areas. No, the bloom is most definitely not off the boom, at least for the discerning gardener.
Jack Radecki of Mount Pleasant Cemetery Has Advice Supervisor of Arboriculture Services demonstrates knowledge of trees and much more If you have walked through Toronto’s Mount Pleasant Cemetery, then you have experienced Jack Radecki’s skill with trees. Employed by the Mount Pleasant Group for over two decades, he is a Graduate Forester from the University of Toronto and, as well as being Supervisor of Arboriculture Services for the cemetery company, is active in many facets, organizations and educational authorities associated with his profession. But Radecki’s skills do not end there. He is also an expert landscape design, nursery operation, tree selection and- what is germane for the home gardener- planting. Attempting to slay sacred cultural
practices is as hazardous a practice as pruning out tree canopies.
Take for instance the all-too-familiar fibre pot.
A half-century ago these were developed in Europe from compressed peat.
A little cellulose from tree pulp acted as a binding agent.
These containers broke down very rapidly after planting (sometimes Then there is the hole itself. This is not an undertaking for the faint of heart. On the solid grey clay that covers much of Toronto north of the old shoreline of Lake Iroquois, the hole should be five times the width of the pot or root ball, says Radecki, and the same depth as the pot. The soil removed from the hole may in part be used to refill it, with the addition of at least five percent compost to it. More desirable on poor soils would be a blend of half the original soil and an equal amount of “triple mix” or similar amended soil. Place two to four inches of this in the bottom to elevate the root ball slightly, hence the “root collar”, or point where the tree leaves the soil in its container. The hole is then backfilled and tamped well down to remove air pockets. A circular ridge is formed around the base of the tree to retain rain and irrigation water. Do not add any fertilizer the first season, Radecki advises. Despite urgings from other sources, this can actually be harmful. Wait until early December, after the leaves have dropped, to apply nutrients. Older gardeners may have the urge to prune at planting. This is also contraindicated, says Radecki. Finally, mulch with bark chips. Radecki would use wood chips, easily available professionally, but home gardeners may find these unpleasantly full of splinters. Do not mulch right up to the trunk but leave a few inches free so as not to provide a cover for bark-chewing mice over the winter months. Watering is, of course, critical in the first year or two. But too much can be as harmful as too little, especially on poorly drained soil. Two five-gallon pails of water every three days will suffice. The results of Jack Radecki’s care, as well as that of his predecessors, are proof that such measures as he advises are essential for urban plantings. Mount Pleasant Cemetery is open to the public all year long. Located on Yonge Street, north of St. Clair and South of Davisville Avenues, it is easily reached by subway, the better way to go, as parking is poor in the area. An excellent guide to the grounds, which date back to 1876, may be found in local historian Mike Filey’s Mount Pleasant Cemetery: An Illustrated Guide, which is complete with maps, along with a chapter on the trees and shrubs to be found there, written by Jack Radecki himself. No one with the faintest interest in the history of Toronto (and especially the figures who so often have painted it with a colourful brush) can fail to delight in Mike Filey’s knowledge. Gardening leads us down so many paths. And also across many a lawn. Fifteen years ago the Metro Parks Commissioner Tommy Thompson died and was buried in the same Mount Pleasant Cemetery where he had found employment as a gardener many years previously. Tommy Thompson was all that a senior bureaucrat should be but seldom is. On his tombstone is the same request he made world-famous: PLEASE WALK ON THE GRASS.
Horticultural Happenings Casa Loma Gardens Free every Tuesday evening through to October from 4 pm until dusk. High Park Meet across the street from the Grenadier Restaurant: confirm program details by phoning 392-1748. Richter’s Herbs 20 August: 4th Annual Herb Fair at Richter’s, Hwy. 47, Goodwood, Ontario. 10 am- 4 pm. 27 August: Herbal Teas. Free lecture at Richter’s, Hwy. 47, Goodwood, Ontario. 2 pm. Toronto Wildflower Garden Tour 26 August: North American Native Plant Society, more information from the Civic Garden Centre at 416-397-1340. Toronto Field Naturalist Outings Free guided walks. Wear suitable clothes and footwear, bring a camera, notebook, binoculars. Children are welcome, but no pets. All walks are TTC accessible. 2 August: Rouge Valley- nature walk. Meet 10:30 am at the NE corner of Sheppard E/ Meadowvale Road; bring lunch and water. A long, rugged walk. 4 August: Nordheimer Ravine- ravine renaturalize. Meet 6:45 pm at south side subway exit of St. Clair/ Bathurst. 9 August: Humber Valley- heritage walk. Meet 10:30 am at the Old Mill subway station. Bring lunch, water. A look at historical Humber and wildflowers. 16 August: Mount Pleasant Cemetery- nature walk. Meet at 10 am at the Davisville subway station. Morning only, don’t miss this one! 20 August: Gardens & Naturalized Sites- urban ecology. Meet 2 pm at the SE corner of Yonge St/ Albertus Ave. 22 August: Toronto Islands- wildflowers, birds and butterflies. Meet at 9:30 am at the ferry docks (foot of Bay). 27 August: Central Don- nature walk. Meet 10:30 am at O’Connor/ Broadview Avenues. Bring lunch and water. Many habitats here. 30 August: Todmorden Mills- nature walk. Meet at 10 am at the entrance to the village on Pottery Road. Bring lunch and water- see woodland trail, meadow, wetlands.
New Products It has been months since the Canada Blooms show, but some are still puzzling over how wonderful landscapes such as that of the Niagara Parks could have water that constantly emitted mist without obviously being boiling hot. The secret is a Water Garden Mister, designed for use in ornamental water features installed indoors or in sheltered gardens. Placed just below the surface and plugged into a power source, it uses simple vibration technology to produce a fine mist which will follow the flow of water. It is available for $89.95 plus taxes from Rittenhouse, at 1-877-488-1914 or hit www.rittenhouse.ca. Apparently as yet only available in commercial quantities, Yucca Extract is claimed by its distributor to make an excellent wetting agent, as well as stimulating plant growth, increasing water and nutrient uptake, and controlling insects and diseases in many plants. Obtained from the Yucca schidigera (desert lily), a native of the Mohave Desert in the southwest U.S., it contains a steroidal saponin. Available in 4-, 20-, and 200-litre containers from Superfast Solutions, 506 Whitelaw Road, Guelph, Ont., N1K 1A2, Tel/Fax 1-800-667-0361, Robert@ycdi.com, www.ycdi.com. Just what every nouveau riche gardener needs: outdoor, all-weather “Rock Speakers” to blast the heck out of the neighbourhood. Made in Canada and cunningly disguised as granite boulders moulded of fibreglass, they can be easily hooked up to any home stereo, according to MP Sales & Distribution, 546 Crimson Court, Oshawa, (905) 571-9479 or www.rockspeakers.com. The late Isaac Asimov recorded that more conventional rock music killed plants in scientifically conducted research.
Gardener’s Bookshelf A useful quick reference book is Garden Way’s Just the Facts. Containing dozens of charts and answering literally thousands of questions, it has occupied an honoured position on gardeners’ bookshelves for the past half-dozen years. It is $22.95 from Storey Communications (1-800-441-5700), or check your favourite local bookstore.
News from a Gardener’s Viewpoint City Gardening peers at the past month’s news from Canada and elsewhere Science Health and Gardeners Environment and Gardeners Down in the Vegetables The Law and Gardeners Landscaping Mushroom News Bugs and Gardeners Cultural Advice for Gardeners Gardening in the City Government and Gardeners Natural Gardening The Travelling Gardener Weather Art and Gardeners Gardener’s Gardener Nomenclature and the Gardener Pink Flamingo Award |
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