Raised bed gardening has exploded in popularity, and for excellent reason. Whether you are dealing with poor soil, limited space, or just want more control over your growing environment, a raised bed solves most common gardening challenges.
Why Choose a Raised Bed?
Raised beds offer dramatically better drainage than in-ground planting. You fill them with a customized soil blend optimized for vegetables, meaning better root development, fewer weeds, and higher yields in a smaller space.
Choosing Your Materials
Untreated cedar and redwood are the top choices, both naturally rot-resistant and lasting 10 to 15 years or more. Avoid pressure-treated lumber near edible plants. Galvanized steel beds are increasingly popular and can last decades.
Ideal Dimensions
- Width: No wider than 4 feet so you can reach the center from both sides
- Length: Any length — 4×8 feet is a popular standard
- Depth: At least 12 inches for most vegetables; 18 inches for root crops
The Perfect Soil Mix
The classic approach is one-third compost, one-third peat moss or coconut coir, and one-third coarse vermiculite. This creates a light, well-draining, nutrient-rich medium that vegetable roots love.
Setting Up and Filling
Place cardboard at the base of your bed before filling to smother existing grass and weeds. Fill in layers, watering as you go to settle the mix. Leave an inch of clearance at the top.
What to Plant First
For spring in San Antonio, start with tomatoes, peppers, basil, and squash. For fall, try lettuce, kale, broccoli, spinach, and carrots. Raised beds warm up faster in spring, giving you an earlier start than in-ground beds.