This episode of "A Garden Runs Through It," from the UC Master Gardener Program of Colusa County, features host Karina, the UC Master Gardener Coordinator of Colusa County, discussing weed management with Liz Eaton.
A weed is any unwanted plant, Eaton describes. The Key characteristics include seed dormancy, long-term seed survival, abundant seed production, and rapid establishment. Identification using plant ID apps is the first step. Site preparation involves soil, plant selection, and irrigation. Mechanical methods include hoeing, cultivation, hand pulling, mowing (below seed heads), and chopping. Solarization uses clear plastic for about 90 days in summer to eliminate small weeds. Remove existing weeds carefully. Mulching with opaque material excludes light; use 1-4 inches, avoid the tree stem. Mowing large areas before planting and string mowers for broadleaf weeds are mentioned. A flamethrower is noted but cautioned against. A vinegar and dish soap mix had limited success as a home remedy. Chemical control is a last resort; identify the weed and read directions carefully. Pre-emergent and post-emergent (like Roundup) options exist. IPM (ecologically based integrated pest management) is encouraged.
Spring gardening chores include planting warm-season vegetables, herbs, and annual flowers, as well as some cool-season crops. Fertilize trees and shrubs once. Watch azaleas and camellias for yellowing and apply chelated iron. Deadhead spent flowers but not spring bulb leaves until yellow. Fertilize bulbs with bone meal after blooming. Apply mulch to retain water, prevent weeds, and enrich soil.
Upcoming UC Master Gardener events in Colusa County: April 5th: Centennial Sprint (2-mile walk/run) celebrating the UC Cooperative Extension Office's 100th anniversary. April 12th: Table at the Colusa County Fairgrounds family fair with succulent planting for kids. The Donna Critchfield demonstration garden is transitioning, harvesting winter vegetables and preparing for spring planting (tomatoes, peppers, squash, marigolds, sunflowers). Visit the UC Master Gardeners of Colusa County on Facebook, their website cecolusa.ucanr.edu, and Instagram @UC Master Gardeners of Colusa. Sign up for their monthly newsletter.
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