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August Gardening Tasks in Transylvania County

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By the Master Gardener℠ volunteers of Transylvania

There are still things to do in the garden in Transylvania County in August, just be sure not to spend too much time in the heat, wear your sunscreen and hat, and don’t forget your insect repellent.

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 Transylvania County Cooperative Extension at 828.884.3109 or send us an email.

Fertilizing

  • Fertilize strawberries with nitrogen this month. Strawberry Grower Guide
  • Do NOT fertilize shrubs in August, September, October, or November.

Planting

Pruning

  • Do not prune shrubs in August, September, or October.
  • Prune “bleeder” trees including maple, dogwood, birch, and elm. Pruning trees and shrubs

Managing Pests and Diseases

  • Monitor for insects and if needed, spray these landscape shrubs for the following insect pests: arborvitae and juniper (spider mites), azalea, and Pyracantha (lace bug). Shrub pests
  • Continue with the rose spray program. Fungus on roses
  • Spray peach and nectarine tree trunks at the end of August for peach tree borers. 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 spraying bunch grapes and tree fruits according to the spray schedule.
  • Control the following woody weeds by spraying them with the recommended herbicide: greenbrier, kudzu, trumpet creeper, and wisteria.

Lawn Care

  • Treat lawns for grubs if needed using recommended insecticides. Controlling Grubs
  • Prepare lawn areas for seeding late in the month if you plan to seed a tall fescue or bluegrass lawn. Lawn Information

Propagation

  • Divide and transplant your iris and daylilies after they finish flowering. Dividing Perennials

Miscellaneous To Do

  • If you are planning to do some fall landscape planting, be sure you have a planting plan prepared. Landscape Design
  • Continue watering your favorite landscape plants and your vegetable garden if dry weather persists. Watering plants
  • Build a compost bin. Compost Bin Plans
  • Dig Irish potatoes this month when the foliage has died back completely. Harvesting Potatoes
  • Stop watering amaryllis and allow them to go dormant for winter blooming.

Plants in Bloom in August:  Crape myrtle, Rose-of-Sharon, Peegee Hydrangea, Abelia, Canna, Dahlia, Cardinal Flower, Butterfly Weed, Phlox, Cleome, Hosta, Liriope, Trumpet Creeper, Summer Annuals

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