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| Ian Robertson, Ltd. Horticultural Tips
February Tips q Plant container-grown, B&B, and bare-root trees and shrubs when the ground is not frozen or too wet. Always plant at the same level plants were grown at the nursery, or slightly higher. Top-dress with 2" of compost. q Do not plant Southern Magnolia or Cherry Laurel until late February or March. q Thoroughly water and mulch new plantings, keeping mulch away from the plant's trunk. q Fertilize evergreen and deciduous trees and shrubs, if temperatures are moderate and the ground is free of snow. Use 'Holly-Tone' on most broad leaved evergreens and 'Plant-Tone' on deciduous plants. Wait until March to fertilize Magnolias and Cherry Laurels. q Prune summer flowering trees (that bloom on new wood) to force new shoots in the spring. q Prune broadleaf and narrowleaf evergreen shrubs to shape. Do not prune spring flowering shrubs or vines, except to remove dead, diseased or crossing wood. q Now is the time to begin heavy structural pruning of evergreen shrubs, such as holly and boxwood. You may wait until mid-March if you prefer new growth to start right away and avoid looking at bare stumps. q Prune summer flowering shrubs that bloom on new growth, like Butterfly Bush and Pee Gee Hydrangea, any time this month. Avoid pruning when the sap is frozen. q After a snowfall, be sure to brush snow off evergreen limbs to prevent breakage. q Remove snow and ice as necessary from walkways and use a magnesium chloride product rather than salt to melt ice. This is safer for plants and pets. q Apply lime-sulfur as a dormant spray on roses when the temperature is above freezing. This will help to control over-wintering disease spores. q Start seeds of annuals indoors during mid-February. They should be ready to plant outside after the last frost date.
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