At our planter box factory, the standard depth for vegetable-growing planters ranges from 8 to 12 inches (20–30 cm). This depth suits most leafy greens, herbs, and compact vegetables like lettuce, spinach, and radishes. For deeper-rooted plants such as tomatoes, peppers, carrots, or potatoes, we recommend our 16-inch or 18-inch deep models, which provide ample room for root development and better moisture retention. Every planter is built with durable, food-safe materials and drainage holes to prevent waterlogging. We also offer customizable depth options to match specific crops and growing conditions. If you are unsure which depth works best, a good rule is: the deeper the planter, the more forgiving it is for watering and nutrient supply, especially during hot summer months. Our 12-inch deep planters are the most popular all-round choice for home vegetable gardens, while our 18-inch planters are ideal for raised beds and ambitious root vegetable projects. Ultimately, choosing the right depth depends on what you want to grow and how much space you have. Our team can help you select the perfect planter depth to maximize your harvest.