Why Raised Beds?
Raised beds solve most of the problems that discourage new gardeners. Poor native soil does not matter because you fill the bed with good soil. Drainage is always excellent. You can garden without bending over. Weeds are dramatically reduced. And the defined space makes planning and maintenance much simpler.
Size and Location
Width: 3-4 feet maximum so you can reach the center from either side without stepping in the bed. Stepping on the soil compacts it, which hurts root growth.
Length: Whatever fits your space. 8 feet is a popular standard because lumber comes in 8-foot lengths.
Depth: 12 inches minimum for most vegetables. 18-24 inches if you are placing the bed on concrete, a patio, or over very poor soil.
Location: Full sun (6+ hours of direct sunlight). Close to a water source. Level ground.
Calculate how much soil you need to fill your bed.
Open Soil Volume Calculator →Materials
Cedar or redwood are the best wood choices. Naturally rot-resistant and last 10-15 years. More expensive upfront but the best long-term value.
Untreated pine is the budget option. Will last 3-5 years before rotting. Good for trying raised beds without a big investment.
Galvanized steel troughs are trendy, durable, and look great. They heat up faster in spring (good for warm-season crops) but can overheat roots in very hot climates.
Avoid pressure-treated lumber (chemicals can leach into soil), railroad ties (creosote is toxic), and tires (chemicals leach when heated).
The Soil Mix
Do not fill your bed with native soil or potting mix alone. The classic raised bed mix is:
- 1/3 topsoil (provides structure and minerals)
- 1/3 compost (provides nutrients and biology)
- 1/3 coarse vermiculite or perlite (provides drainage and aeration)
First-Year Planting Plan
For a 4x8 foot bed, a great first-year plan is:
- 4 squares of tomatoes (1 plant each)
- 4 squares of peppers (1 plant each)
- 4 squares of lettuce (4 plants each = 16 lettuce)
- 4 squares of herbs (basil, cilantro, parsley, dill)
- 4 squares of carrots or radishes (16 per square)
- 4 squares of beans or peas (9 per square)
Plan your exact layout with the bed planner.
Open Garden Bed Planner →Start with one bed your first year. Learn what grows well in your climate, what pests you deal with, and what you actually enjoy growing. You can always add more beds next season.