Things to do in September

Fertilize:

Feed chrysanthemums every 2-3 weeks until buds appear, then weekly until buds show color. Fertilize roses, gardenias and magnolias.

Water: Water trees and shrubs deeply and slowly.

Divide:

Transplant after dividing: Amaryllises, Callas, Cannas, Daylilies, Irises, Liriope, Wood Ferns.

Soil:

Test soil every 3 years to help plan fertilizer applications. Start a compost pile with fall leaves and yard debris; shred with lawnmower. Replenish mulch in beds.

Lawn Care:

Watch for brown patch in St. Augustine turf as temperatures cool. Lawns with a history of the disease should be sprayed in late month and again in 3 weeks with Terraclor or Daconil. Early morning is the best time to water lawns. Mow every 5-7 days, leaving the clippings on the lawn.

Diseases/Pests to look out for:

Watch roses for blackspot and mildew. Fall webworms are easiest to control when treated early with Bacillus thuringiensis (Bt).

Prune:

Remove dead and damaged wood from shrubs and trees. Lightly prune pyracanthas so berries will show.

 

Things To Plant In September:

Flower Plants:

  • Ajuga
  • Alpine Aster
  • Wax Begonia
  • Boltonia
  • Butterfly Weed
  • Calico Plant
  • Candytuft
  • Chinese Forget-Me-Not (Cynoglossum amabile)
  • Cockscomb
  • Cornflower
  • Dianthus
  • Daisy (English, Shasta and Painted)
  • Euryops
  • Impatiens
  • Larkspur
  • Liatris
  • Lobelia
  • Petunia
  • Phlox (divaricata and paniculata)
  • Obedient Plant (Physostegia)
  • Salvia (perennial types)
  • Sedum
  • Stock
  • Stokes’ Aster

Flower Seeds:

  • Alyssum
  • African Daisy (Arctotis)
  • Balsam
  • Bluebell
  • Bluebonnet
  • Calendula
  • Castor Bean
  • Cockscomb
  • Columbine
  • Cornflower
  • Cosmos
  • Daisy
  • Delphinium
  • Four-o’clock
  • Hollyhock
  • Larkspur
  • Liatris
  • Marigold (French)
  • Poppy
  • Snapdragon
  • Stock
  • Sunflower

Bulbs:

  • Allium
  • Amarcrinum
  • Calla
  • Autumn Crocus (Colchicum)
  • Cooperia
  • Daylily
  • Dietes
  • Hardy Cyclamen
  • Spider Lily (Hymerocallis)
  • Liriope
  • Louisiana Iris
  • Ipheion
  • Lily
  • Lycoris
  • Oxalis
  • Monkey Grass
  • Rain Lily
  • Scilla
  • Watsonia

Purchase tulip, crocus, hyacinth and daffodil bulbs to pre-chill.

Vegetables:

  • Early-Mid Month: Beans, Peas (English & edible pod), Summer Squash
  • Mid-Late Month: Broccoli, Cabbage, Cauliflower, Chinese Cabbage, Collards, Garlic, Kohlrabi.FRUIT: Prepare soil now for winter fruit tree planting

 

Other Things To Do:

Trick Poinsettias into holiday bloom.

Beginning on the fall equinox (September 21/22) make sure potted plants get 14 hours of darkness every 24 hour period. Use a water-soluble fertilizer mixed about 1/4 strength with every watering. Plants should show color around Thanksgiving. At that point, restore them to bright, indirect sunlight and cut back on fertilizer.