by Lee
Stewart
Colorado State University Extension Master
Gardener
Larimer County
It’s time to deadhead coreopsis, dianthus and geraniums—doing
so will result in a re-bloom.
Combat spider mites on plants and shrubs with strong blasts of water from a
hose. Spider mites prey on stressed plants in hot weather. Keep container plantings
well-watered.
Check perennials for leaf spot, rust or viral disease. Cut discolored foliage
back to new growth at the plant’s base.
Mulched beds of wood chips used in annual and perennials flower beds can tie
up nitrogen in the soil. Stunted or yellowed plants may need low nitrogen fertilizer
added at this time.
Hornworms may appear on tomato plants. They are easily picked off. Look for
black droppings on leaves. These caterpillars can defoliate plants and leave
big holes in your tomatoes. They may be difficult to see since they are the
same color as the foliage and hide easily.
The authors have received training through Colorado State University Extension's Master Gardener program and is a Master Gardener volunteer for Larimer County.
Gardening and Insect Fact Sheets are available on-line by clicking HERE.
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