June 2021

Water lawns and gardens three times a week depending on temperatures, wind and rainfall.
Water established trees slowly and deeply once a week.
Water shrubs three times a week.
Water annuals and perennials in containers three times a week depending on pot size and temperatures. (New plantings will require more water the first year.)
Adjust timers on your automatic sprinkler systems.
Water more frequently as the outdoor temperature increases. Watering in the morning is recommended.

DO NOT fertilize if temperatures are over 85 degrees.
Apply a good fertilizer on established trees, shrubs and ornamental grasses if you have not done so in the previous month.
Fertilize cool-season lawns such as bluegrass or park blend.
Fertilize warm-season lawns such as buffalo, bermuda and gramma.
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.
Continue to fertilize established roses with a good rose food.
Fertilize annual container gardens with a high phosphorus blooming formula weekly for continued blooming throughout the summer.
Fertilize vegetables with a good organic vegetable food.

Plant flowering annuals and perennials in your gardens for wonderful flowering all summer.
Plant or refresh your containers with annuals, perennials and/or small shrubs. Remember the saying, “Thriller, Filler, Spiller!”
Plant native trees, shrubs and perennials for beautiful low-water xeric landscape.
Prune spring-flowering shrubs shortly after blooming in late spring/early summer.
Mow established lawns weekly.
Use a good weed killer to fight weeds.
Apply a pre-emergent to established lawns and ornamental flower beds to prevent weed seed germination.
Continue to remove spent flower blossoms from roses and flowering plants to promote repeat flowering.
Refresh mulches as needed to conserve moisture.
Take houseplants outside and put them in a shady, protected area. It’s a great time to rinse the accumulated dust off leaves, leach out soil with water and fertilize.
Annual flowers such as sunflowers, cosmos, zinnias and morning glories can be directly seeded in your garden. You can also seed with perennial wildflower mixes.
Continue seeding warm-season lawns.

Keep an eye out for aphids, spider mites and other insects. Eliminate as needed.
Use BT to prevent damage on your plants from budworms (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 other foliage for powdery mildew.
Spray fruit trees with a good fruit tree spray to prevent insects and diseases. 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 the problem areas. We can also identify plants for you.
Inspect roses and other foliage for powdery mildew and other diseases and treat as necessary.
Apply chelated iron or soil acidifier with iron to chlorosis-prone trees and shrubs, chitalpa, maples, aspens, willows, euonymus and photinia and other non-native trees and shrubs.
Kill weeds with a good weed killer.

June is the last month to plant warm-season vegetables such as tomatoes, green chili, bell peppers, eggplant, beans, cucumbers, squash and melons.
Plant herbs such as basil, rosemary and tarragon.
Continue to plant vegetables in successive planting so that you have continuous harvesting throughout the growing season.