Seedling trays are perfect for planting seed starter kits. 32-grid seedling trays with a tray height of 2.36 inches just fit the standard 2.5-inch height.Large grid design: Larger and deeper grids can hold more soil, which helps the root system develop more sub-roots, sprout and grow seedlings longer in the tray before transplanting. The increased volume of each grid helps each plant get water and other nutrients.Versatile: These seedling trays are the most widely used and best size to meet the different needs of plants such as vegetables, flowers, herbs, fruits, etc.These trays are a great choice for vegetable seedlings, sprout seedlings (such as peppers, tomatoes, cucumbers, pumpkins, sunflowers, eggplants, melons), and fruit seedlings (such as strawberries, cherries, etc.) to start. These seed trays are ideal for those who use bottom water.Tray: This 32-grid tray has more grid space to plant plant roots when used with a tray.