Here are tips from the Guilford Garden Journal by Karen Neill.
Ornamentals
° Be on the lookout for the return of insects such as aphids and mites.
° Hand-pull winter weeds such as henbit and common chickweed from landscape beds.
° Prune your hybrid tea roses severely this month to force healthy new growth. Also begin your fungicide spray program to keep the black spot disease down.
° Start seedlings for tender annual bedding plants such as marigolds, petunias, zinnia, celosia, impatiens, even that of flowering tobacco.
° Buy geraniums this month. These cold tolerant annuals like the warm days and cold nights. The extra carbohydrates are stored and used for flower production right now.
° Later this month, provided soil has dried out enough, you can set summer bulbs like dahlia, canna and gladiolas.
° Caladium tubers should be started inside during March. This allows them time to be- gin growth which can be slowed with the cold soil. In the early spring pot them shallowly.
° Plant peonies where they will receive the morning sun. Set them so that the pink buds are just above the soil. Peonies will not bloom if set too deeply.
° Do not prune birch, maple, elm or walnut until after they have leafed out.
° Wait to prune spring flowering shrubs such as forsythia until after it has finished blooming.
° Apply a fresh layer of mulch 2-4 inches deep to landscape plantings.
° Clean up and destroy debris from the perennial bed. Divide those perennials that have spread and are encroaching on other plants.
° Fertilize spring flowering bulbs as the foliage emerges with an all purpose fertilizer.
° Plant cool season annuals to set outside this month including alyssum, calendula, pansy, snapdragon and viola – hardy seed such as alyssum, larkspur, poppies and sweet William can be direct seeded.
Edibles
° Prepare soil for spring planting but wait until soil is dry enough to be worked.
° Plant potatoes, peas, onion, lettuce and other salad crops along with broccoli, cauliflower and cabbage.
° Start seeds inside for tomatoes peppers and other warm season vegetables.
° Apply dormant oil spray to fruit trees to kill any overwintering insects.
° Finish pruning young fruit trees this month along with figs and grapes if they need it.
° March is the ideal time to plant any bare root or container grown fruit trees.
° Fertilize fruit trees using an all purpose fertilizer like 10-10-10. Be careful when feeding blueberries as they can be damaged by over fertilization.
° Pay particular attention to pears. These need to be sprayed with an agricultural strep- tomyocin for fire blight, a very common disease problem. .
Lawns
° Spray lawns for winter annual weeds such as chickweed and henbit with a liquid broadleaf spray. Read label thoroughly as you must not apply these if planning on applying seed in spring.
° Apply a pre-emergent herbicide for crabgrass control this month.
° Feed cool season lawns early this month with slow release nitrogen products. Do not apply fertilizer after March 15th.
° Have lawn mower blade sharpened if not previously done and service engine i.e. new spark plugs and oil.
° Begin mowing fescue at a 2 1⁄2 to 3 inch height leaving the clippings.
Miscellaneous
° Repot any potbound houseplants before finding location outside for them this summer.
Karen Neill, Extension Agent
Agriculture – Urban Horticulture
Guilford County Cooperative Extension 336-375-5876
Provided by the North Carolina State University and North Carolina A&T State University Cooperative Extension.
Photo Credit: wordcat57 on Flickr
http://flic.kr/p/4BP2qx