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Tuesday, Aug. 26th 2014

August Gardening Calendar Week 4


  • Continue spraying roses that are susceptible to black spot and other fungus diseases.
  • Annuals may appear leggy and worn now. These can be cut back hard and fertilized to produce a new flush of bloom.
  • Deadhead annuals and perennials as needed.
  • Order bulbs now for fall planting.
  • Evergreens can be planted or transplanted now to ensure good rooting before winter arrives. Water both the plant and the planting site several days before moving.
  • If you want to grow big dahlia flowers, keep side shoots pinched off and plants watered and fertilized regularly.


  • Lawns scheduled for renovation this fall should be killed now. Have soil tested to determine fertility needs.
  • Dormant lawns should be soaked now to encourage strong fall growth.
  • Verify control of lawn white grubs from earlier insecticide applications.


  • Compost or till under residues from harvested crops.
  • Begin planting lettuce and radishes for fall now.
  • Pinch the growing tips of gourds once adequate fruit set is achieved. This directs energy into ripening fruits, rather than vine production.


  • Prop up branches of fruit trees that are threatening to break under the weight of a heavy crop.
  • Watch for fall webworm activity now.
  • Cultivate strawberries. Weed preventers can be applied immediately after fertilizing.


  • Soak shrubs periodically during dry spells with enough water to moisten the soil to a depth of 8-10 inches.
  • Once bagworms reach full size, insecticides are ineffective. Pruning off and burning large bags provides better control.
  • Hummingbirds are migrating through gardens now.
  • Clean out cold frames to prepare for fall use.
  • Monitor plants for spider mite activity. Hose these pests off with a forceful spray of water.
  • 2nd generation pine needle scale crawlers may be present on mugo pine now.


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University of Missouri Extension Master Gardener Program