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How Deep Your Raised Garden Bed Should Be To Grow Healthy Produce
By JUSTO ALVAREZ
Generally, your raised garden bed must be deep enough for your crop roots to fit comfortably and thrive without issues, and the recommended depth is 20 inches for most plants.
However, it may vary depending on the type of plant you're growing. To determine how much space your plant needs, find out if they are shallow, medium, or deep-rooted.
For example, to grow veggies like lettuce, cabbage, or peas, you'll need 12 to 18 inches of soil, and plants like carrots, peppers, or kale require 18 to 24 inches of soil.
To fit their root systems, tomatoes, alfalfa, and okra
all need 36 inches of soil. A raised bed can never be too deep since the deeper it is, the better the plants will grow.