August Gardening Tips

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Below are just a few tips for the month of August. If you have questions, please call our Master Gardener℠ volunteer hotline at 338-3954 on Monday from 10 a.m. to noon.


  • Feed with a complete fertilizer. Remove spent blooms, hips, and any dead canes. A good time for stem cuttings.
  • Do not prune or fertilize trees or shrubs after the 15th to prevent any new growth that may not have time to harden off before frost.


  • Later this month put in new plants of peas, beets, kale, cauliflower, and cabbage.
  • Seed or transplant leaf lettuce, radishes, spinach, squash, and turnips.
  • Sow seeds of bush, pole, and lima beans plus cucumbers.
  • Cloves of garlic for harvesting early next summer.
  • Divide and transplant iris and daylilies.


  • Deadhead crape myrtles.
  • Cut cannas back to about 3”.
  • Shear back old petunia blooms and they should rebloom.
  • Be sure to water strawberries and blueberries each week plus fertilize them as good cell growth will determine next year’s berry size.
  • Fertilize basil with liquid fertilizer.
  • Keep annuals deadheaded for continuous blooms.