Raised Bed Gardening: A Complete Setup Guide

Raised beds solve more gardening problems at once than almost any other setup: bad native soil, poor drainage, weeds, and back strain all improve the moment you lift growing space a foot off the ground. They cost more upfront than an in-ground bed, but for most home gardeners, they pay that back in yield within the first season.

1. Choose your material

Cedar or redwood — naturally rot-resistant, lasts 10+ years untreated, the most popular choice for a reason
Pine or fir — cheaper, but expect to rebuild in 4–6 years without a liner
Galvanized steel — very long-lasting, heats up more in full summer sun than wood
Concrete block or brick — permanent, excellent for larger beds, more labor to install
Avoid old railroad ties or chemically treated lumber older than the mid-2000s — older pressure-treated wood used arsenic compounds that can leach into soil

2. Get the sizing right

Width: 4 feet maximum if accessible from both sides, 3 feet if only from one side — you should never need to step into the bed to reach the middle
Length: whatever fits your space; beds longer than 8 feet benefit from a step-through gap
Depth: 8 inches minimum for most vegetables; 12+ inches for carrots, potatoes, and other deep-rooted crops

3. Prep the ground underneath

On grass or weeds: lay cardboard or several layers of newspaper down first — it smothers what's underneath without needing to dig it out, and breaks down naturally within the season
On poor or contaminated soil: a raised bed with a solid or lined bottom keeps roots entirely in the good soil you add, rather than reaching down into what's beneath
Always check for level — an unlevel bed drains unevenly, leaving one end soggy and the other dry

4. Fill it with the right soil mix

Raised beds need a lighter, more nutrient-dense mix than in-ground gardening — a good starting ratio:

60% quality topsoil or garden soil
30% compost — the single biggest driver of how well anything grows
10% aeration material — perlite, vermiculite, or coarse sand for drainage

Top up with an inch of fresh compost each season rather than refilling the whole bed — raised bed soil settles and depletes faster than in-ground soil because it drains more freely.

5. Plant with the bed's advantages in mind

Raised beds warm up faster in spring and drain better in wet weather, which means:

You can plant roughly 1–2 weeks earlier than an in-ground bed in the same yard
Closer spacing works better than in-ground row spacing — intensive square-foot-style planting takes full advantage of the improved soil
Watering needs increase compared to in-ground beds, since raised soil dries out faster; a soaker hose or drip line saves real effort over a season

6. What to plant in a first-year bed

New raised bed soil is usually nutrient-rich from the fresh compost, which favors heavy feeders in year one:

Tomatoes, peppers, and squash — thrive in the loose, rich soil
Leafy greens — fast payoff while slower crops establish
Root vegetables — carrots and beets do noticeably better in loose raised-bed soil than compacted native ground

A well-built raised bed is a multi-year investment, not a single-season project — the setup work up front is what makes every following season easier. Once it's built, GrowLocal's garden designer lets you map out exactly what goes where inside your bed's real dimensions, and plan next season's layout before this one's even finished.