Things to do in May

Fertilize:

Feed all spring-blooming shrubs after they have bloomed. Feed amaryllis after they bloom. Feed and mulch iris. Feed crape myrtle with 1/2 cup/sq. yd. of 3-1-2 ratio fertilizer beneath the branch spread.

Water:

Water annuals as needed. Mulch all bare soil to retain moisture.

Transplant:

Container-grown plants can go into the ground now.

Lawn Care:

Mow every 5-7 days, leaving the clippings on the lawn. Keep St. Augustine grass at 2 1/2" to 3" height. Apply 1/2’ to 1" of water as needed to wet soil thoroughly. Don’t water more often than every five days.

Diseases/Pests to look out for:

Check for aphids and spider mites. Look for tobacco hornworms, spider mites and stink bugs, especially in vegetable gardens. Spray peach and plum trees for curculio weevils. Spray blackspot-susceptible roses with fungicide every 7-10 days.

Prune:

Prune spring-flowering shrubs and trees after they bloom. Prune climbing roses and other "once bloomers" as soon as they finish flowering. Divide chrysanthemums and pinch tips for bushier growth. Pinch back leggy annuals to encourage branching. Deadhead plants to encourage blooming. Prune frost-damaged trees and shrubs. Remove sucker shoots from tomato plants to get earlier, larger fruit.

Things To Plant In May:

Flower Plants:

  • Ageratum
  • Ajuga
  • Joseph’s Coat (Amaranthus)
  • Balsam
  • Wax Begonia
  • Blue Daze
  • Blue Cardinal Flower
  • Boltonia
  • Scarlet Bouvardia
  • Calico Plant
  • Chocolate Plant
  • Cigar Plant (Cuphea Ignea)
  • Cockscomb
  • Coleus
  • Columbine
  • Copper Plant
  • Coreopsis
  • Cosmos sulphureus
  • Dahlia
  • Shasta Daisy
  • Feverfew
  • Geranium
  • Gomphrena
  • Hibiscus
  • Hollyhock
  • Impatiens
  • Jacobinia
  • Lantana
  • Marigold (African, French and Mexican Mint)
  • Nierembergia
  • Penta
  • Periwinkle
  • Persian Shield
  • Plumbago
  • Phlox drummondii
  • Portulaca
  • Purslane
  • Purple Coneflower (Echinacea)
  • Rudbeckia Hirta
  • Salvia
  • Sedum
  • Stokes’ Aster
  • Sunflower (Helianthus)
  • Wishbone Flower (Torenia)
  • Yarrow
  • Zinnia

Flower Seeds:

  • Ageratum
  • Balsam
  • Castor Bean
  • Celosia
  • Cleome
  • Cockscomb
  • Coleus
  • Coral Vine
  • Cosmos
  • Cypress Vine
  • Dahlia (Dwarf)
  • Echinacea
  • Feverfew
  • Four-o’clock
  • Globe Amaranth
  • Gourd
  • Impatiens
  • Linaria
  • Nasturtium
  • Marigold
  • Moonflower
  • Morning Glory
  • Periwinkle
  • Petunia
  • Pinks
  • Portulaca
  • Scabiosa
  • Sunflower
  • Sweet Pea (perennial)
  • Tithonia
  • Torenia
  • Vinca
  • Zinnia

Bulbs:

  • Acidanthera
  • Amarcrinum
  • Amaryllis
  • phpidistra
  • Caladium
  • Canna
  • Ginger
  • Daylily
  • Gladiolus
  • Liriope
  • Monkey Grass
  • Neomarica

Vegetables:

  • ALL Month: Amaranth, Jerusalem Artichoke (Sunchoke), Jicama, Malabar Spinach, Okra, Southern Pea, Peanut, Pumpkin, Sweet Potato, Tomatillo, Watermelon.

Herbs:

  • Anise
  • Star Anise
  • Basil
  • Bay
  • Borage
  • Bouncing Bet
  • Caraway
  • Catnip
  • Chives
  • Comfrey
  • Costmary
  • Cumin
  • Fennel
  • Fenugreek
  • Scented Geranium
  • Germander
  • Horehound
  • Horseradish
  • Lamb’s Ear
  • Lavender
  • Lemon Grass
  • Lemon Verbena
  • Mexican Mint Marigold (a great substitute for French Tarragon)
  • Monarda
  • Oregano
  • Perilla
  • Rosemary
  • Sage
  • Santolina
  • Summer Savory
  • Winter Savory
  • Sesame
  • Sorrel
  • Southernwood
  • Tansy
  • Tarragon
  • Thyme
  • Common Wormwood
  • Roman Wormwood
  • Yarrow

Fruit:

  • Container-grown plants can go in the ground.