March marks the start of the spring gardening season in Colusa County. Longer days and warming temperatures begin to push new growth across the landscape. It is also one of the busiest times of the year for gardeners. A little work now can help set the stage for healthy plants and productive vegetable beds in the months ahead.
Before planting begins in earnest, take time to prepare the garden. Check irrigation systems for leaks or broken emitters and make any needed repairs. Early maintenance can save water and ensure plants receive consistent moisture as temperatures rise.
As plants begin to grow, fertilizing becomes important. Apply a slow release fertilizer to roses, annual flowers and berries once spring growth starts. Citrus and deciduous fruit trees can also benefit from feeding this month. Lawns should receive a slow release fertilizer as well to support early season growth.
New growth often attracts pests. Watch for aphids on roses and other tender shoots. A strong spray of water can often remove them. Insecticidal soap or horticultural oil sprays may also help control infestations.
March is also a good time to prepare vegetable beds. Work compost into the soil before planting to improve soil health and structure. Cool season crops such as lettuce, carrots and cilantro can be planted directly in the garden now. Mid March is also a good time to plant potatoes.
Gardeners can begin planting summer blooming bulbs such as canna, gladiolus and crocosmia. Early in the month, bare root trees and shrubs may still be available at garden centers and can be planted while supplies last.
Warm season vegetables should wait a little longer. Tomatoes, eggplant and peppers need warm soil and nighttime temperatures above 55 degrees to grow well. Gardeners eager to plant early should be prepared to warm the soil or protect young plants from cool nights.
As spring flowers begin to fade, prune and fertilize spring blooming shrubs and trees after they finish flowering. Regular pruning helps maintain shape and encourages healthy growth.
Weeds will also begin to grow quickly this time of year. Pull them while they are small to prevent them from spreading. Gardeners should also watch for slugs and snails. Iron phosphate bait can help control them, or they can be removed by hand during evening garden checks.
Source: University of California Agriculture and Natural Resources. Visit cecolusa.ucanr.edu.