Spokane County Extension

Garden - Lawn - Landscape


June


Mow your lawn regularly to a height of 2 to 3 inches. Do not remove more than one-third of the height of the grass blades. Keep mower blades sharp. Dull blades tear the grass tips, which leaves a lawn looking ragged and yellow.

Turfgrass needs approximately one inch of water per week. To avoid shallow roots and related problems, water deeply once or twice a week unless you have very sandy soil. Water sandy soil more frequently and apply less water.

Plant petunias, marigolds, zinnias, asters, nasturtiums, salvia, coleus and impatiens outdoors.

Watch for notches eaten out of leaf edges of peonies, azaleas, bergenia, lilacs, rhododendrons, and other shrubs. That is the root weevil at work. The adult weevil crawls up the plant from the ground at night, so you will not be able to see them during the day.

Watch for a build-up of mites on geraniums, fuchsias, and other susceptible plants as the weather warms up. Protect these plants with frequent water sprays.

A month after iris blossoms have died back, cut leaves down to a few inches above ground level. Divide and replant them after flower heads are removed. Do not bury the rhizome. Keep it at ground level when replanting.

Keep snipping off faded blossoms of annual and perennial flowers. Pinching back stems will keep plants compact and healthy.

 

 

Hang fuchsias in partial shade and keep them moist. Pinch back shoots with fading blossoms to keep plants full and compact.

After rhododendrons have blossomed, fertilize with a high-acid fertilizer formulated for rhododendrons.

Fertilize roses after the first bloom. Choose a granular formulation for roses or use liquid fertilizer on the foliage every two or three weeks.

Fertilize annuals with a balanced fertilizer. High nitrogen content is helpful until the plants reach full size; then apply a high phosphorus fertilizer for increased blooming.

Pinch back chrysanthemums now to increase bushiness and flowering later in the season.

Shear hedges and prune tams, junipers and pfitzers. Prune out water sprouts and undesirable shoots on ornamental trees and shrubs, maples, walnuts and birch trees.

Transplant basil, tomatoes, eggplant and peppers into the garden. Sow seeds of beans, corn, melons, squash pumpkins, and cucumbers.

Look for and pick out cutworms, root maggots, cabbage worms, aphids, Colorado potato beetles and weevils in the vegetable garden.

 

 

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WSU Extension Spokane County , 222 N Havana, Spokane WA   99202-4799, 509-477-2048, Contact Us