What to Plant
Trees and Shrubs: Most varieties. Consider planting a small tree to replace trees lost in the storms of the past several years; perhaps, a flowering accent tree. Sally Scalera suggests:
Annuals / Bedding Plants: Replace declining winter annuals with colorful heat-tolerant annuals, such as crossandra, gazania, salvia, melampodium, and zinnia that will last into fall. See Annuals.
Bulbs: Plant gladiola corms 6 inches apart and 4 inches deep; stake as they grow. Plant caladium for a showy tropical display all summer. See Bulbs for Florida
Herbs: In addition to their culinary value, many herbs are ornamental and attract butterflies to the garden. See Herbs:
Vegetables: This is the last month to plant arugula, beans, cantaloupe, carrots, celery sweet corn, endive, okra, radish, squashes, Swiss chard, and watermelon. See Vegetable Gardening in Florida
Keys to a Successful Vegetable Garden: varieties of plants selected for our conditions, good soil, adequate light, irrigation, fertilization, and attention. Restoring Soil Nutrients – from Mother Earth News
12 critical soil nutrients plants need for healthy growth & how to supply them.
What to Do
Shrubs and trees: Prune when new growth begins after the end of the dormant season. To guard next season's blooms, begin pruning after the last flowers fade but before the new buds set. See Pruning Landscape Trees and Shrubs
Mulch: Add mulch to minimize weeds and conserve moisture during dry weather. See Landscape Mulches
Lawns: Fertilize lawns this month if not done in February. See Lawn Fertilizer and Identify damaging insects and spot treat early to prevent widespread damage. See Turfgrass Pest Insects
Pests: Monitor landscape plants for insects, especially for the presence of aphids on tender new growth. Insects become more active during warm weather. See Landscape Pest Management
Insects should be presumed innocent until proven guilty of damage. Identify them before taking any action. Most are not damaging. Pesticides should be the final option.
Tropical and subtropical fruits: Enhance pollination of fruits during spring flowering by allowing a selection of nearby weeds to grow to provide a nectar source for bees, wasps, and flies.