April is a great garden month in the Coachella Valley as the color season reaches its peak.
The danger of frost has passed, so now is the ideal time to plant subtropicals that are sensitive to cold such as bougainvillea, hibiscus, lantana, cape honeysuckle, and citrus.
Plant warm-season annuals in sunny beds with prepared soil. Marigolds, periwinkles and zinnias will do well. Prune and thin Senna and Texas rangers lightly after flowering stops. You want to control growth and keep natural forms, yet increase plant spread and create additional wood for the next flowering season.
Citrus tips
Plant in a full-sun location or one with some afternoon shade.
Space grapefruit trees 20 feet apart, most other citrus 15 feet apart.
Build a basin around the tree at least 4 feet in diameter with sides about 6 inches high. Fill basin and soak soil to 2 feet deep at least twice a week in April and May. Soak to 3 feet deep about twice a week June through September. In winter months, water every 10-12 days. In a year, water the established tree as a mature tree.
Apply mulch over the basin area and well away from the trunk.
Use these holidays as a reminder to fertilize your citrus trees: Easter, Memorial Day, and Labor Day.
Other tasks:
- Set out culinary herbs like mint, rosemary, sage, parsley, and thyme. Basil is the prime summer herb.
- Continue to plant and transplant warm-season vegetable crops. Consider onions, garlic, potatoes, tomatoes, sweet corn, squash, gourds, eggplant, peppers and melons. Choose short-days-to maturity fruiting varieties before average temperatures hit 100 F.
- Create a pollinator garden. Lantana, verbena, lavender, penstemon and salvia are options.
How to Become a Master Gardener
University of California Master Gardeners of Riverside County will offer its nine-month training program from September 2023 to May 2024. Twice-a-month classes will be held in Palm Desert.
Those interested should attend an information session from 6-8 p.m. May 2 at the UCR Palm Desert campus, 75080 Frank Sinatra Drive, Palm Desert.
Information: Rosa Olaiz, rmolaiz@ucanr.edu, or learn more here.