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It’s September… What Needs To Be Done?


  •  Lawn establishment using warm-season grasses such as Bermudagrass, St. Augustine, zoysia, and buffalograss should be completed early in the month. Winter overseeding of perennial rye on established Bermuda grass lawns may be done anytime in the month.
  • Plant these fall-blooming annuals from bedding plants before buds have opened: marigolds, petunias, asters, dianthus, snapdragons and mums. Wait until the weather is cooler to plant pansies, violas and ornamental kale and cabbage.
  • Spring and summer blooming perennials such as container grown roses, salvias, phlox and most all the varieties of vines can be planted at this time. Remember to amend the soil and keep plants watered if rainfall is not sufficient for plants to become established.
  • Complete sowing bluebonnets this month to ensure spring flowers. Buy acid-scarified seed (process that softens external seed coat) for uniform germination. For long season color consider purchasing a wildflower mix that includes bluebonnets, black-eyed Susan, blanket flower, Indian blanket, Indian paintbrush, Mexican hat, plains coreopsis, purple coneflower and evening primrose–just to name a few. Look for mixes that contain annuals and perennials as well as cool season and warm season plants. Sow seeds into areas that are free of grasses and lightly tilled. Sow seed and lightly rake area to get seed into contact with soil before watering.


  •  Apply high-nitrogen fertilizer (3-1-2 ratio) on lawns and shrubs to prepare plants for fall and winter. Container plants will benefit from using high-nitrogen water soluble fertilizers.
  • Tidy up summer perennials by removing dead and faded flower stems and seed stalks. Continue through fall.
  • Root-prune native and established trees and shrubs that you intend to transplant this winter. Cutting the roots around the plant with a spade will stimulate new root growth prior to the move.


  •  Check for spider mites on fall tomatoes and newly planted transplants. Treat with a strong stream of water or insecticidal soap.
  • Apply a pre-emergent herbicide to lawn early in the month to control winter weeds. Depending on the type of weeds targeted, it may be necessary to apply two products–one for grassy weeds (annual bluegrass, ryegrass etc.) and another for broadleafed weeds (chickweed, clover, dandelion, henbit, etc.)
  • Make final application of Image and Sledgehammer before mid-month to control nutsedge in lawns and landscape beds.
  • Remove webworms from pecan trees. Cut off the ends of branches as soon as the webs appear. Tear open large webs to expose worms for the birds. Spraying is not practical.
  • Spray roses suffering from blackspot and powdery mildew using a labeled fungicide.

Click here to read the complete  July 2017 E-Garden Newsletter


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