Fertilize Outdoor Plants
Early spring as plants begin to emerge is a great time to fertilize. Trees, shrubs, perennials, and small fruits will all benefit from a side dressing of compost, composted manure, or commercial fertilizer. To prevent burning, be careful not to get the fertilizer on the foliage of your newly emerging perennials.
Cut Back Ornamental Grasses
Cut back ornamental grasses to within a few inches of the ground this month. If you cut any later in the season, you may nip the newly emerging shoots and damage the appearance of the grass for the summer.
Pot Up Summer-Flowering Bulbs
It's not too early to pot up caladiums, cannas, and tuberous begonias for summer bloom. Using new potting mix, plant the bulbs in plastic containers. Water well after planting, and put the pots in a warm, bright area. Then, when danger of frost has passed, the pots can be put directly into decorative planters outdoors.
Install Floating Row Covers
Floating row covers are effective barriers against early-season pests, as long as you get them in place as soon as you've finished sowing your seeds or transplanting your seedlings. Anchor them to the ground with metal staples fashioned out of old coat hangers. With plants that need pollination by bees, like squash, be sure to remove row covers once plants begin to flower.
Transplant Trees and Shrubs
As soon as the soil can be worked, and before the buds break, dig trees and shrubs for transplanting. Dig carefully to create a soil ball as large as you can handle. Replant them as soon as possible in a hole twice as wide as the soil ball. Be sure to water them in well.