Wondering how many urban planter boxes you need for a fresh, homegrown salad? The answer depends on your salad size and lettuce variety. A typical small side salad requires about 1-2 cups of loose-leaf lettuce. Since one mature lettuce plant (like loose-leaf 'Salad Bowl') yields roughly 1-2 cups, you'll need 1-2 healthy plants per salad.
Planter box capacity is key. In a standard 24-inch long, 8-inch deep window box, you can comfortably grow 4-6 lettuce plants with proper 4-6 inch spacing. This means one well-planted box can yield enough for 2-4 small salads at once. For a continuous supply, consider succession planting. Start with one box, sowing seeds every two weeks. Once you harvest the first plants, new seedlings will be ready to grow, creating a sustainable cycle.
For a household wanting 2-3 small salads per week, two planter boxes on a rotating schedule are ideal. Choose fast-growing, cut-and-come-again varieties like Oakleaf or Lollo Rossa. They allow you to harvest outer leaves repeatedly, maximizing yield from each plant. Ensure your boxes have drainage holes, use quality potting mix, and place them in a spot with at least 4-6 hours of sunlight. With just one or two planter boxes, you can enjoy the crisp satisfaction of garden-to-table greens regularly.