Monthly Gardening Tips

July 2020


  • Water lawns and gardens three times a week depending on temperatures, wind and rainfall.
  • Water established trees slowly and deeply once a week.
  • Water fruit trees three times a week as they continue to develop fruit.
  • Water shrubs three times a week.
  • Water plants in containers three times week depending on pot size and temperatures.
  • New plantings will require more water the first year.
  • Use rain barrels to collect water from the monsoon rains.
  • Inspect and repair drip irrigation as necessary.


  • Continue to fertilize houseplants with a good water-soluble fertilizer. Be sure not to over-fertilize or over-water houseplants and never fertilize a sick plant.
  • Fertilize annual container gardens with a high-phosphorus blooming formula weekly for continued blooms throughout the summer.
  • Fertilize vegetables with a good organic vegetable food.
  • Fertilize roses with a slow release fertilizer.
  • Do not fertilize cool season lawns in temperatures over 85 degrees.

Yard And Garden

  • Continue to plant flowering annuals and perennials in your garden for colorful flowers all summer.
  • Plant up or refresh containers with annuals, perennials and/or small shrubs. Remember the saying, “Thriller, Filler and Spiller!”
  • Plant native trees, shrubs and perennials for beautiful low-water xeric landscape.
  • Plant iris and daylilies.
  • Mow established lawns weekly. In hot weather, mow to 2-3 inches high.
  • Kill weeds with a good weed killer.
  • Continue to remove spent flower blossoms from roses and flowering plants to promote repeat flowering.
  • Refresh mulches as necessary to conserve moisture and suppress weeds.
  • Make sure you have finished pruning your spring flowering shrubs by mid-month.

Insects And Diseases

  • Keep an eye out for aphids, spider mites and other insects. Eliminate as needed.
  • Use BT to prevent damage on your plants from budworms (in geraniums and petunias) and tomato horn worm on tomato plants.
  • Add calcium to prevent blossom end rot. Most good tomato fertilizers with have calcium in them.
  • Check roses and foliage for powdery mildew and other diseases.
  • Spray fruit trees with a good fruit tree spray to prevent insects and diseases. Read the labels. Fruit trees are developing fruit so keep your trees hydrated and fertilize according to the label.
  • Bring in samples of insects or damaged plants to our pharmacy in plastic baggies for solutions to problem areas. We can also identify plants for you!
  • Apply chelated iron or soil acidifier with iron to chlorosis-prone trees and shrubs, chitalpa, maples, aspens, willows, euonymus, photinia and other non-native trees and shrubs.
  • Treat for bores on trees by saturating the trunk of the tree with a good borer killer.


  • You can still plant herbs such as basil, rosemary and tarragon!
  • Plant squash and beans now.
  • Harvest vegetables and fruit as they ripen. Enjoy!


  • Start a new compost bin.
  • Do your gardening in the morning or after supper to avoid midday heat.