August Garden Guide

gillnurseryMonthly Garden Guide1 Comment

Prepare Your Garden Spaces for Fall Planting

  1. Clean areas of unwanted weeds and debris.
  2. Break up the soil and add organic matter like Cotton Burr Compost, and turn or till it in.
  3. Mix in dried molasses and organic fertilizer like Medina Growin’ Green.
  4. Water and let it rest until you are ready to plant.
  5. Keep it watered to encourage beneficial microbes in the soil.

Read: Organic Gardening

Read: Comfort for Summer: Shade Cloth


Late Summer Vegetable Transplants

Plant tomato, eggplant, and pepper transplants after August 10th. Be sure to keep watered well and evenly shaded from the hot afternoon sun.

Read: Homegrown Tastes Best
Garden Guide: Fall Tomatoes

Fall Vegetable Seeds

Seeds of beans, cabbage, peas, winter squash, and turnips. Start in pots and then transplant to garden. Protect from intense heat and sun.

Pumpkin Seeds

If you want pumpkins by Halloween, plant your seeds by August 10th.

Bluebonnet Seeds

Sow bluebonnet seeds now for spring bloom.


All tropicals including allamandas, mandevillas, palms, pentas, blue daze, hamelia, hibiscus, esperanza, and plumbago will continue growing and blooming.

Summer Annuals

Annuals such as zinnias, moss rose, gomphrena, purslane, periwinkles, caladium and coleus will continue to flourish.

“House” Plants

Don’t forget that “house plants” are generally tropical in nature and love a nice shady or semi shady patio to put on the best show. Ficus, schefflera, corn plants, dracaenas, ivies, ponytail palms, and bromeliads all like heat and humidity.

Read: Plants, the Perfect Rx for Clean Air

All container grown trees, shrubs, and vines.

Garden Guide: Planting Trees, Shrubs, and Groundcovers
Read: Crape Myrtle Season


  • Continue removing faded flowers from annuals and perennials to encourage new blooms.
  • Faded blooms and seed pods from crape myrtle to promote additional blooming
  • Dead wood from trees and shrubs
  • Trim plants as needed to maintain size and shape.
  • Palms as needed
  • Poinsettias early in month – last pruning for December color


  • Check all newly planted material for water every day.
  • Check pots, containers and hanging baskets often, as they dry out quickly and need more water.
  • Apply mulch as needed to help conserve moisture.
  • Make arrangements for someone to water if leaving for more than 2 days, especially with new plants.
  • Follow City Water Restriction Guidelines.


All trees and shrubs

with Gill Lawn and Garden Fertilizer, Green Diamond Supreme Lawn Food, organically with Milorganite, Medina Growin Green

Annuals and perennials

with Miracle Gro or Osmocote Time Release Granules, organically with Medina Growin Green, or Hasta Gro

All hibiscus and tropical bloomers

with Hibiscus Food, organically with Maestro Gro-Rose Glo

All granular fertilizer should be watered in well.

Lawn Care

  • Organic fertilizers such as Milorganite, and Medina Growin Green are excellent fertilizers that feed plants and soil and are the best choice during hot, dry periods.
  • Lay new sod anytime, and Bermuda seed anytime this month.
  • Apply Hi Yield Iron Plus to yellow spots in lawn. Organically use Texas Green Sand.
  • Mow as required. Keep St. Augustine cut to about 3”, Bermuda at 1” – 2”.
  • Watch for Chinch Bugs and Grub Worms.
  • Water well every 7 to 10 days.

Watch Out For

  • Mealy bugs

    Treat with Cyonara, Spectracide Triazicide, or Bonide Systemic; organically with Neem Oil or Insecticidal Soap.

    Read: Mealy Bugs are Here!

  • Chinch bugs in lawns

    Treat with CyonaraSpectracide Triazicide, or Bayer Complete; organically with Spinosad or Diatomaceous Earth.

  • Spider mites

    Treat with Cyonara, Spectracide Triazicide, or Bonide Systemic; organically with Neem Oil, Spinosad, or Insecticidal Soap.

    Note: Spraying your plants with seaweed extract helps repel spider mites, and it’s good for your plants too!

  • Fleas and ticks

    Treat lawns with Cyonara, or Spectracide Triazicide, organically with Spinosad, or Diatomaceous Earth.

  • Borers in mesquites, cottonwoods, ash, and yucca.

    Treat organically with Spinosad.

  • Fungus, Powdery Mildew

    Treat with Fertilome Broad Spectrum Fungicide, or Systemic Fungicide; organically with Neem Oil, or Serenade.

  • Unwanted caterpillars – remember that many caterpillars turn into the butterflies that we love and enjoy!

    If necessary, treat organically with Thuricide or Spinosad.

  • Read: Darn Those Summer Bugs!

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