Raised beds have many advantages. Unlike planters, which are containers, raised beds are open on the bottom, allowing roots to extend into the ground. Raised beds can reduce weeds in planting beds, prevent soil compaction from stray footsteps, improve drainage, prevent erosion, and extend the growing season. Here’s what you need to know to get started on your own raised bed garden for next season.
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When siting raised beds, sunlight is the primary consideration. The instructions on most seed packets call for 6 to 8 hours of direct sunlight, but home gardeners rarely have such conditions. To make the best of the sunlight you have, study the light in your available space. Remember that 3 hours of morning sun is not as intense as 3 hours of afternoon sun and that your sunniest spots will shift over the seasons. You can take advantage of these differences to stretch your growing season or squeeze in warm-weather crops that wouldn’t grow elsewhere in your garden. Don’t forget to consider convenience. An extra half hour of sunlight farther from the house won’t benefit your garden much if the distance discourages you from going out to water.
If you’re not handy, you can pick from many raised beds kits that are easy to assemble. But building raised beds is a fairly simple project, even for carpentry beginners. Construction options for raised beds are limited only by your imagination and skill level, but most gardeners opt for simple and functional. Rectangular boxes 3 to 4 feet wide will allow you to reach the middle without stepping on the soil. Beds should be at least 6 inches high. Unless your underlying soil is very poor, there is little benefit to soil depths much greater than 12 inches.
You can get boards cut to order at most hardware or lumber stores. Alkaline copper quat (ACQ) and copper azole (CA-B) have replaced toxic chromated copper arsenate (CCA) for pressure treating. But if you want an organic garden, skip the pressure-treated lumber entirely. Naturally rot-resistant woods, like redwood, cedar, and black locust, are the best woods to use for garden beds. Look for SFI-, or better yet, FSC-labeled wood to ensure it came from responsibly managed forests. Boards can be joined at the corners with wood screws, or for really easy construction, you can buy connectors. In most cases, gardeners will purchase quality topsoil to fill their raised beds.
We recommend EarthEasy.com’s excellent guide to building a raised bed. Check it out.
There are many approaches to raised bed gardening and many strategies to maximize your vegetable harvest. Numerous gardening guides give detailed instructions for raised bed gardening. What you plant and when you plant it will depend on your climate, your space, and your available time. Whatever methods you choose, your raised beds will provide an aesthetic and practical frame for your garden.
This article was originally published on January 14, 2019.