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  • May garden tips & tasks

    GARDEN EVENTS IN MIDDLE TENNESSEE

    May 20: Master Gardeners of Davidson County Urban Gardening Festival, 9 a.m. - 4 p.m., Ellington Agricultural Center Demonstration Garden. Free admission. www.mgofdc.org; on Facebook at www.facebook.com/mgofdc.

    June 10: Middle Tennessee Daylily Society show and sale, Ellington Agricultural Center’s Ed Jones Auditorium, 440 Hogan Rd. in Nashville. Sale open at 10 a.m.; show opens to the public at 1 p.m. To learn more about the Middle Tennessee Daylily Society, visit www.middletndaylilysociety.org.

    It’s time to plant those tender herbs and vegetable transplants, such as basil, dill, tomatoes, green peppers, hot peppers, eggplant.

    If tomato transplants are already too tall and leggy, you can plant them on their sides and cover the long stems with soil. The stem tips will turn upward, and the buried stems will sprout roots.

    Sow seeds of bush beans and pole beans, cucumbers, sweet corn, melons, okra, field peas, pumpkin, squash and zucchini. Follow the directions on the seed package for planting depth and spacing. Vegetables grow best in full sun.

    Cut the faded blossoms of peonies. Fertilize the plants lightly in late spring or early summer.

    Remember the basics of watering: morning is best, so plants’ leaves have time to dry before evening. Lawns, perennial borders and annuals like to have 1 – 1½ inches of water per week.

    Many indoor plants enjoy a summer vacation outdoors. Give them a cool, shady spot in the yard, and don’t forget to water them.

    Prune thyme frequently so it will stay full and green in the center.

    Weeding is easiest after a rain. If the ground is too dry and you need to weed, soak the bed first with a hose or sprinkler.

    Whether they’re growing in the ground or in pots on the porch, pinch the tips of geraniums from time to time to encourage them to branch out and to produce more flowers. Geraniums in pots benefit from regular feeding with a water-soluble fertilizer.

    Remember that mulch can be a gardener’s best friend. Pine straw or composted leaves are good alternatives to hardwood mulch.

    Harvest herbs as they reach their peak. Dry small leaves on a screen, hang small bunches of long-stemmed herbs in a warm, dry room out of the sunlight.

    Plants growing outdoors in containers dry out quickly when it’s hot. Check them daily, and water as needed.

    Don’t go near hydrangeas with the pruning shears unless all you’re cutting is dead branches. If the bigleaf hydrangeas look like they’re not going to bloom, it could be that the buds were nipped in a late cold snap, or the plant was pruned too late last year.

    As the flowers of Shasta daisies begin to open and then to fade, keep them clipped off. This prolongs the blooming season of daisies (and most other annuals and perennials), and keeps the plants looking better, as well.

    Watch for aphids on shrubs and perennials. A strong blast of water from a hose will remove many of them, or spray with insecticidal soap.

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Keep hellebores healthy

I inherited a fairly large garden of hellebores when I moved into my current house. There is a problem with black spots on the leaves that I researched on the internet. I have cleaned out the dead leaves from the winter to improve their appearance and air circulation. What is the best way to deal with this problem?

Hellebore-webIf you’ve cut off the dead leaves of the hellebores and gotten any infected foliage around the plants cleaned up and destroyed, you’ve already gotten a good start on controlling the problem by non-chemical means. Leaf spot disease seems to be a fairly common affliction of Helleborus, caused by a fungus, and the first line of defense is to avoid spreading it around, and keep the area inhospitable to fungal growth.

The best information I found about diseases that affect hellebores is at the website of the Royal Horticultural Society. RHS experts note that there are no fungicides specifically designed to treat leaf spot disease on hellebores, but that fungicides labeled for other ornamental plants may help control hellebore leaf spot. (I always recommend the non-chemical methods first).

Hellebores are a beautiful addition to a garden because they bloom when not much else is happening – in late winter and very early spring. In Middle Tennessee (where The Garden Bench calls home), we often enjoy watching the flowers open in January, sometimes peeking cheerfully through light dustings of snow.

Hellebores grow best in rich, well-drained soil that is somewhat alkaline or neutral pH; they may suffer in soil that is too dry or that stays too wet. The plants enjoy a little sun but thrive in dappled shade. Once established, they may resent being moved, but hellebores that are doing well may self-sow, and you can transplant seedlings in early spring.

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