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September Things to Do in the Garden

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As the temperature starts to cool down a bit in September, it is a great time to head out to enjoy the garden.

To help you keep up with all that is going on, we’ve put together a list of gardening tasks to do now with links for more information on each topic. If you have questions or need more information, please contact the N.C. Cooperative Extension – Transylvania County Center at 828.884.3109 or send us an email.

Fertilizing

  • Fertilize cool season lawns with one pound of nitrogen per 1,000 square feet. Cool season lawn information
  • Apply lime according to the soil test report.
  • Do NOT fertilize shrubs in August, September, October, or November.

Planting

Pruning

  • Do not prune shrubs in August, September, or October.
  • Divide peonies late in the month. Peony care

Managing Pests and Diseases

  • If not already done in August, spray trunks of peach, nectarine, cherry, and plum trees, including ornamental varieties the first week in September to prevent peach tree borers. Borers may also be killed by inserting a wire into the hole, taking care not to damage the tree. Fruit Spray Schedule.
  • Monitor for insects and if needed, spray the following fall vegetables for insects: broccoli, cabbage and cauliflower (worms), squash (borers). Vegetable pests control
  • Continue to spray rose bushes. Fungus on roses
  • Remove Japanese stiltgrass before it blooms and goes to seed. Controlling stiltgrass

Lawn Care Lawn Information

  • Core-aerate cool season lawn if needed.
  • Seed cool season grasses at the beginning of the month
  • Keep newly seeded areas watered.
  • Fertilize cool season lawns.
  • Apply lime if required.

Miscellaneous To Do

  • Apply pre-emergent herbicides in garden beds in mid-September to control cool-season annuals such as chickweed and annual bluegrass Weed control
  • Remove crop residue as garden harvest is complete and destroy if diseased or insects are present.
  • Strawberry beds need one inch of water each week now for good flower bud development.
  • Compost leaves and other garden refuse. Composting
  • Order spring bulbs to be planted in October and November.
  • Take soil samples. Soil samples

Plants in Bloom in September: Crapemyrtle, Rose-of-Sharon, Peegee Hydrangea, Abelia, Dahlia, Canna, Ginger Lily, Chrysanthemum, Spider Lily, Fall Crocus, Liriope, Sedum, Asters, Goldenrod, Joe Pye Weed, summer annuals