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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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Moving calla lilies

Question: We live near Crossville, Tenn. and will be moving soon. What is the earliest I can dig up my callas? They have survived well the past three winters without being dug up but they probably need to be separated anyway.

calla-lilyAssuming that your callas are the type that die to the ground each winter and reappear the following spring, the rhizomes can be dug up anytime in the fall and stored for winter.

Callas are native to South Africa, so there is always the chance that the tubers may not survive extremely cold winter in the ground. But most gardeners I talk to in Middle Tennessee (Zone 7a, home of The Garden Bench) say they never dig up the rhizomes, and they come back each year. In Zone 6b (The USDA Hardiness Zone for Crossville), their survival seems a little less certain, but if yours have continued to grow and spread, then they must be in a friendly environment.

Here’s the recommendation for winter storage from the Gardening Know How website: To dig the rhizomes for storage, lift the clump out of the soil and allow them dry for two or three days, brush off the remaining soil and store them in peat moss in a paper bag in a cool, dry location.

Replant them in their new home next spring, after the danger of frost. Callas appreciate slightly acid soil that drains well, and should be watered regularly while they are growing and in bloom. They grow in full sun or partial shade.

The graceful flower bracts of calla lilies, which open about mid-spring or early summer, are lovely and delicate, but don’t be fooled by this. Callas are sturdy plants, and I have seen them escape their bed and push up through the packed gravel of nearby garden paths.

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