Garden Tips for May and June

The story of this spring is definitely the brilliance and abundance of flowers in our gardens and in our wild lands. But have you noticed the foliage also seems especially vigorous and healthy? Along with my plants, native and exotic, birds, reptiles, amphibians and insects in my garden all seem to make the most out of this perfect beautiful spring weather.

Planting

Try to finish planting in the ornamental garden before summer weather arrives. You can plant water-loving plants through summer, but even for them, transplant shock will be lessened if you can plant while we still have cool nights. Almost everything can be planted now, especially early in the month. Summer color can liven up both the ornamental and edible gardens.

Species to plant now include zinnia, marigold, petunia, sunflower, cosmos and impatiens. It's still valid to look for climate-adapted ornamental plants and limit the dependence of your ornamental garden on heavy irrigation during the hot summer months. You must water your edible garden as much as it needs to keep it healthy and growing quickly.

Vegetables to plant now include tomatoes, peppers, basil, eggplant, summer squash and tomatillos. Don't worry about some shade in your edible garden. Many summer garden vegetables do fine if they get at least six hours of sun a day, which is just about half a day. Heat lovers to plant in the full 14 hours of sun are winter squash, melon, okra, beans and corn.

Why not try a three-sisters garden of corn, beans and squash? If you have an established garden, care for your soil by adding straw, compost and composted manure or, if you must, store-purchased amendment. If your soil is healthy, your plants will need far less pest and disease management, making the garden healthier and less work.

Maintaining

Check your watering system and adjust as the weather warms. Your new transplants will need to be supplied with water on a regular basis through late spring and right into summer. Don't expect even low-water-use plants to survive on no water during their first year.

Deep water stone fruit, apple, pear, and nut trees. For established gardens, the top several inches of soil can dry out for almost all plants in the well-mulched garden and in whatever lawn you still have. Many people overwater their lawns, especially in late spring. This encourages disease and insect problems. Mature trees and shrubs probably have plenty of groundwater reserves this year; let's observe and see where we can retrain ourselves about our summer watering.

Compost and/or mulch if you haven't already to your planting beds. Keep wood mulch at least six inches away from tree trunks. Raise the mowing height to three inches for all types of lawn to shade out weeds and keep roots cooler.

Monitor the edible garden for common warm season insect pests: earwigs, aphids, slugs, snails and grasshoppers. Blast soft-bodied insects like aphids with a stream of water. Insecticidal soap is a good all-purpose insecticide for many insects, and it doesn't kill as many beneficial insects as broad-spectrum powders and sprays do. Try to tolerate some damage to feed garden friends like birds, spiders, lacewings, ladybugs, assassin bugs, lizards and praying mantis.

Many native plants, including native milkweed, tolerate aphids, milkweed bugs and monarch caterpillar damage. Hand pick tomato/tobacco worms, hoplia beetles on roses, snails and slugs. Leave rolled newspaper traps or put a little oil into opaque bottles and leave them laying sideways under garden plants to trap earwigs.

Fertilize citrus with fertilizer labeled for them. Citrus in containers needs to be fertilized at least once a month during their blooming and growing season to produce well. Citrus in the ground should be fertilized this month and then not again until next year. Fertilize your warm-season lawn and groundcovers with an all-purpose product to promote vigorous growth and help prevent weeds.

If you haven't already, fertilize your roses. You may find that compost is all you need; don't feel pressured to add store-purchased fertilizer if your plants are vigorous and healthy. Sometimes we think we "must" do things, but do we need more growth that we will need to prune later? Do we need more fruit that will just end up on the ground or compost bin? Many low-water-use plants are better off without fertilizer to keep them longer-living and more compact.

Conserving

Don't disturb your bee nesting and bird houses. Observe your trees before having the tree trimmers come to make sure you're not disturbing an active bird nest. Leave a little radish, mustard and broccoli blooming in the edible garden until seed set to support pollinator insects. Consider adding a new plant for the wildlife. Do you have room for a quail bush (Atriplex lentiformis), mulefat (Baccharis salicifolia) or California fuscia (Epilobium californica)? Do you have room for yarrow, California buckwheat or California native milkweed?

Native milkweed has pink and white, not yellow or orange flowers. Can you dedicate a space in the garden that is less manicured? This will support the greatest diversity and number of native bees, beneficial insects, lizards, toads and birds. The abundance of healthy life in balance with other lives is what makes a beautiful garden.

Questions?

Call the Master Gardeners:

Tulare County: (559) 684-3325, Tuesdays and Thursdays, 9:30-11:30 a.m .;

Kings County: (559) 852-2736, Thursday only, 9:30-11:30 a.m.

Visit our website for past articles, sign up for our e-newsletter, or email us with your questions: http://ucanr.edu/sites/UC_Master_Gardeners/

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