March Newsletter Time to Plant Finish planting cool-season vegetables early this month. Towards the end of the month start planting warm-season annuals such as Begonias, Impatiens, Marigolds and more. Finish moving any summer and fall perennials before new growth appears. Early spring is still a great time to plant trees, shrubs, vines, groundcovers and more. What to Prune Finish all dormant pruning early this month before new growth begins. What to Fertilize Time to apply pre-emergent to your lawn. Feed Roses monthly. Fertilize Rye and Fescue lawns. What to Watch out for! Use a cool-season broadleaf weed killer. As soon as fruit trees finish blooming need to start a weekly spraying of Neem to protect against insect. Watch out for fungus on roses, start weekly spraying soon.