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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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Water worries for houseplants

Question: I use tap water to water all my houseplants, but I’ve heard that’s not always a good idea. What difference does it make?

peace-lily-2Most people don’t think about the water they use to water houseplants —  just turn on the tap and fill the watering can. But what’s in your tap water may make a difference in how your plants grow.

Garden author Barbara Pleasant talks about water problems in her book, The Complete Houseplant Survival Manual. She says most plants prefer “soft” water, which contains low amounts of calcium and magnesium salts, over “hard” water, which contains high amounts of these elements. Water softeners remove the mineral salts through filtration or magnetization, but the water still contains high levels of salt, she says. This could lead to problems when it is used to water plants.

Pleasant suggests using rainwater or bottled distilled water, which are naturally soft, on your indoor plants.

The mineral salts in tap water are only one thing to consider. Plants may also be sensitive to too much chlorine, which is added to tap water to prevent bacteria, and some plants, including palms and dracaenas, are sensitive to fluoride.

To solve the problem of too much chlorine, allow the water to sit out overnight, so that chlorine and other chemicals escape into the air. If you suspect fluoride may be causing a problem (browning leaf tips on plants may be a clue), it may help to add a pinch of lime on the surface of the pot every few months, Pleasant advises. “This helps raise the pH of the soil, which makes the fluoride more soluble in water.

One other watering tip: whatever the source of the water, make sure it’s at room temperature when you water your plants. Drenching a houseplant in icy water chills the roots, which can cause them to rot, Pleasant says.

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One Response

  1. I wholly endorse the idea of dechlorinating water by letting it sit at least overnight. I used to have issues with my fern dropping leaves after a month indoors (I’d take it down to the garage and leave it till spring), but now that I’ve adopted the practice of letting water sit out, my fern stays lovely all winter and then is ready to divide when spring comes (so I put half in the garden and half in a pot on my porch).

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