Control weeds that emerge in response to winter rains. No weeds means no rain, which means you must irrigate. Check ryegrass lawns and flower beds with your soil probe to see whether the soil is adequately moist at root level. If you sowed wildflower seeds in October, you'll have to water them, too, if it doesn't rain. Don't water the lawn at night.
Annual ryegrass is a succulent, watery plant and easily succumbs to leaf fungi.
Irrigate down to eighteen inches in the early morning and let the sun dry the leaves. Use your soil probe to tell you when the soil is drying out around the roots. Don't irrigate until it does. In the warmer parts of the desert, plant trees. Large numbers of yellow leaves on trees and shrubs in January are a warning that the buds soon to break into new spring growth will need extra nitrogen.