Spokane County Extension

Garden - Lawn - Landscape


April


Install a new lawn or renovate an undesirable one. Newly seeded lawns may take two or more weeks to germinate.

Fertilize lawns if you didn’t apply a combination fertilizer and crab grass control in March.

Pull or hoe all weeds in your yard and garden. Try to keep their numbers low, and get them before they go to seed.

Now is a good time to seed annuals such as marigolds, zinnias, cosmos and nasturtiums indoors.

Plant roses with the graft two inches below the soil in a well-drained area that gets at least 6 hours of sunlight per day.

You can still transplant trees and shrubs. Finish pruning chores on all but the flowering shrubs and trees.

Fertilize spring-flowering bulbs and any ornamental fruit and berry plants that were not fertilized in March.

Fertilize spring-blooming shrubs after flowering is complete.

Fruit tree pests and diseases are common in the Inland Northwest. A regular spray program is necessary to produce the best quality fruits. Consult Master Gardeners for spray schedules for apples, cherries, peaches/apricots, pears, and plums.

 

 

If you do not have resistant varieties of raspberries and have experienced problems with caneblights, powdery mildew and other fungal diseases, apply a delayed dormant spray of lime sulfur when the buds begin to show green.

You can plant new berry plants this month but you should not fertilize strawberries until August.

Cultivate garden beds as soon as soil is dry enough to work. Plant roots need loose soil twelve inches deep. Mix in a few inches of compost or other organic material.

Transplant cabbage, Brussels sprouts, broccoli and cauliflower starts. Fit stems of cabbage and broccoli plants with stiff paper disks to help control root maggots.

Sow seeds of lettuce, carrots, greens and beets. Plant seed potatoes and onion bulbs. Cover planted areas with row cover to keep insect pests out.

Bare-root trees, ornamentals, fruit trees, small fruits, and perennial vegetables like horseradish and asparagus are still available in garden centers. Select fully dormant plants and plant them immediately.

Plan now for drought tolerant, heat loving plants. Some plants to consider in a drought tolerant garden are kinnickinnick, smoke tree, cotoneasters, barberries, coneflowers, bergenia, iris, penstemons, sedums, thymes, and many others.

 

 

 

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