The UC Master Gardeners of Contra Costa County shared advice on Mar. 30 for home gardeners interested in growing tomatoes using raised beds.
Raised beds can improve tomato growth by allowing gardeners to control soil quality, drainage, and crop rotation. Tomatoes require at least six to eight hours of direct sunlight each day and benefit from good air circulation. The group said that careful planning of bed location and size helps prevent disease and supports healthy plants.
The organization recommends building beds at least 12 to 18 inches deep, with a width of four feet or less for easy access. They also advise spacing tomato plants two feet apart or more, depending on the variety, to reduce humidity and limit fungal diseases. Adding compost-rich soil and mulching the surface helps conserve moisture and suppress weeds.
Crop rotation is highlighted as an important step in maintaining plant health over time. Tomatoes should not be planted in the same spot every year because soil-borne fungi can build up, causing wilting diseases such as Fusarium and Verticillium. Rotating crops every three to four years is suggested as a preventive measure.
University of California Agriculture and Natural Resources (UC ANR), which oversees the UC Master Gardener program, secures funding through public contributions according to its official website. The organization promotes sustainable practices that strengthen resilient ecosystems and economic vitality according to its official website. It operates nine research and extension centers across California’s diverse ecosystems according to its official website.
UC ANR is recognized for linking university research with community needs through trusted services according to its official website. As part of the University of California system, it manages Cooperative Extension services statewide according to its official website, conducting more than 33,000 educational events annually with support from over 18,000 volunteers according to its official website.
Through workshops and partnerships in all counties across California, UC ANR delivers science-based information on agriculture and natural resources while mobilizing volunteers and research centers for environmental stewardship according to its official website.