“It’s spring fever ... You don’t quite know what it is you do want, but it just fairly makes your heart ache, you want it so.” – Mark Twain


1. Prune spring-blooming plants as they finish blooming. For more information see http://ipm.ucanr.edu/homegarden/pruning/. To keep old lilacs vigorous, prune a few of the lilac stems to the ground each year, and prune suckers off grafted varieties of lilacs.

2. Fertilize lawns, roses and all flowering plants about to bloom. For more information on lawn care see http://ipm.ucanr.edu/QT/lawnfertilizingcard.html.

3. If you did not fertilize them last month, fertilize citrus, trees and shrubs. For more information see http://ipm.ucanr.edu/homegarden/fertilizing/.

4. Fertilize azaleas, camellias and rhododendrons when they finish blooming with an acid-type fertilizer. Prune them by finding the bump on each branch where the new growth grew out of the old. Cut back to this point for more flowers next year.

5. Plant out summer bulbs such as callas, cannas, dahlias, gladiolus, lilies and tuberous begonias.

6. Plant the vegetable garden while the spring weather is still upon us. Before you know it, the summer heat will be here. Remember to thin out overabundant young seedlings to get the best crop.

7. Sow seeds of summer flowers such as cosmos, marigold and zinnia, which are all easy to grow from seed. Also set out bedding plants. Nurseries are now well stocked with summer-blooming annuals and perennials.

8. Continue to thin fruits when they are as big as a dime. This produces larger fruit and results in less weight damage to limbs. For more information on taking care of fruit trees see http://homeorchard.ucdavis.edu/8047.pdf.

9. Apply an acid-type fertilizer to the blueberry bushes. Two good varieties to grow in our area are Misty and South Moon.

10. May is a good month to look for clematis at the nursery. Some bloom now; others are summer or fall bloomers and they are excellent plants for attracting pollinators.

11. Manage ants around landscape and building foundations by using insecticide baits and trunk barriers. For more information on controlling ants see http://ipm.ucanr.edu/PMG/GARDEN/CONTROLS/antmanagement.html.

12. Place out and maintain lure traps for yellow jackets. Trapping is most effective during late winter or early spring. For more information see http://ipm.ucanr.edu/QT/yellowjacketscard.html

For more information, contact the UC Glenn County Master Gardener’s Plant Clinic on Wednesday afternoon from 2 p.m.-4 p.m. in the UC Cooperative Extension Office by phone at 865-1107, by email at anrmgglenn@ucanr.edu or submit a question on our website at http://ucanr.edu/sites/glennmg/.

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