Raised Bed Vegetable Garden: Beginner Layout Guide

Building Your First Raised Bed Garden

Raised bed gardening is the fastest way to start a productive vegetable garden. By controlling the soil mix, drainage, and planting layout from day one, you skip the years of soil improvement that in-ground gardens require and start harvesting in your first season.

Choosing Your Bed Size

4x8 feet is the standard starter size — large enough for a good variety of crops, small enough to reach the center from both sides (maximum reach is 2 feet). Height: 11-12 inches for most vegetables, 18-24 inches if you have mobility concerns or poor native soil.

Best Raised Bed Soil Mix

The proven "Mel's Mix" formula by volume:

• 1/3 compost (blend 3+ sources: mushroom, worm, manure, leaf)
• 1/3 peat moss or coco coir (water retention and aeration)
• 1/3 coarse vermiculite (drainage and root oxygenation)

A 4x8x12 inch bed needs about 32 cubic feet of mix (roughly 1 cubic yard). Budget: $80-150 for materials.

Beginner Layout Plans

Spring Garden (16 squares in a 4x4 grid)

Lettuce ×4	Radish ×16	Peas ×8	Spinach ×9
Carrots ×16	Onion ×9	Broccoli ×1	Cabbage ×1
Beans ×9	Beets ×9	Swiss chard ×4	Cilantro ×4
Tomato ×1	Basil ×1	Pepper ×1	Marigold border

Succession Planting Schedule

• Week 1: Direct sow peas, radish, carrots, spinach
• Week 3: Transplant broccoli, cabbage, onion sets
• Week 6: Transplant tomatoes, peppers, basil (after frost danger passes)
• Week 8: Succession sow lettuce, beans, beets

Construction Options

Cedar (best): Naturally rot-resistant, lasts 10-15 years. 2x12 boards, $60-80 per bed.

Galvanized steel: Modern, attractive, lasts 20+ years. Corrals from $40-120 per bed.

Concrete block: Cheapest option, extremely durable. Stack dry (no mortar needed). $30-50 per bed.

Avoid: Pressure-treated lumber with CCA (copper-chrome-arsenate) — arsenic leaches into soil. New ACQ-treated lumber is considered safe but some gardeners still prefer to avoid it.

First Season Maintenance

Water daily for the first week after planting, then switch to deep watering 2-3 times per week. Mulch the surface with 2 inches of straw or shredded leaves to conserve moisture and suppress weeds. Check for pests weekly — hand-pick caterpillars, use row covers for cabbage moths.

With this setup, a single 4x8 raised bed can produce $200-400 worth of vegetables in its first season, paying for itself many times over.