March/April Landscape Calendar

Remember with the record breaking heat we're experiencing this Spring, water will be CRUCIAL in your landscape thriving. Twice a week watering is a minimum when no rain is forecasted. During late April/May, some additional hand watering may be needed.


  • Annual flowers that can be planted in March include: ageratum, alyssum, amaranthus, asters, baby's breath, begonia, calendula, celosia, cosmos, dahlia, dusty miller, gaillardia, geranium, hollyhock, impatiens, marigold, nicotiana, ornamental pepper, pentas, phlox, rudbeckia, salvia, sweet williams, torenia, verbena, vinca and zinnia.
  • Caladium bulbs are extremely sensitive to cold soil. There is no advantage to planting early. Purchase caladiums while there is a good selection, but wait until late March or April before planting them in shady beds.

Trees and Shrubs

  • Finish pruning summer flowering shrubs such as althea, hibiscus, abelia, oakleaf hydrangea and oleander.
  • Delay the pruning of azaleas, camellias, spiraeas, gardenias and other spring flowering shrubs until after flowering is complete.
  • Prune any cold weather-damaged plants after new growth appears.
  • If needed, fertilize shrubs and small trees with a slow release fertilizer. A good general-purpose landscape fertilizer is a 15-0-15.
  • Mature palms should receive an application of granular fertilizer. Use a special palm fertilizer that has an 8-2-12 +4Mg (magnesium) with micronutrients formulation. Apply one pound of fertilizer per 100 square feet of canopy area or landscape area.
  • This is the last opportunity to spray shrubs with dormant horticultural oil.
  • Pick up all fallen camellia blossoms and remove them from your property. This practice helps to prevent petal blight next season.
  • Prune ornamental grasses.
  • If you are in the market for specific colors of azaleas, visit the local nurseries and garden centers this month. Though this is not the most ideal planting time you are assured of the right flower color without having to wait until next blooming season.

Fruits and Nuts

  • It's time to finish planting bare-root fruit trees.

If you missed an article, please visit our Special Topic Archive