Grow & Garden Upgrade Your Garden the inside of the box. Harmful chemicals can leach into the soil and possibly the plants. Avoid using pressuretreated lumber for the same reason.
The Ideal Dimensions
Every article you will read online will have a different answer to this question, but in reality, this will also depend on your own circumstances and objectives. However, there are a few guidelines you should follow.
If you want to have access to all sides of your garden, four feet is the most practical width. But it should never be less than 18 inches wide. The length can be as short as four feet. However, anything above 10 to 12 feet long becomes unwieldy, as wood boards tend to bow when they come under the pressure of added soil.
The height could range from as little as six inches for herbs and leafy greens such as lettuce; root vegetables and bush plants such as peppers require at least 12 inches; and all other vegetables, including tomatoes, cucumbers and squashes, will need 18 inches or more. 24-inch beds are generally considered ideal because they allow the deep-growing plants plenty of room, and that height will also help take the strain off your legs, knees and back. It is also the most dimensionally practical size to build.
Many have found a four-by-eight bed to be the most practical and economical. It only requires three 2-by-12s from the lumber yard for a one-foot-high bed.
Time to Build
To begin, cut one of the boards in half. That will give you two eight-foot-long boards and two four-foot-long
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