How can I control weeds in my raspberries?
Cultivation and mulches are the most practical weed control measures for home gardeners. Cultivate the raspberry plantings frequently during spring and summer. To prevent injury to the roots of the raspberry plants, don’t cultivate deeper than 2 to 3 inches.
Mulches help to control weeds and conserve soil moisture. Possible mulching materials include straw, shredded leaves, lawn clippings, crushed corncobs, sawdust, and wood chips. The depth of the mulch needed depends upon the material. The depth ranges from 3 to 4 inches for fine materials, such as sawdust, to 8 to 10 inches for straw. Since mulches gradually decompose, apply additional material each year. Avoid mulching poorly drained soils to discourage root diseases.