Reusable Seed Starting Inserts | Made in the USA Durable, deep plug tray inserts designed for seedlings that need more room to grow. These 4-Cell Deep Plug Tray Inserts are ideal for starting and up-potting crops like tomatoes and peppers that benefit from deeper root space. Made in the USA from food-safe, heavy-duty polypropylene, these inserts are built for repeated use across many growing seasons. Each insert features air-pruning slits to encourage strong, healthy root development and an extra-large drainage hole for easy seedling removal. Quick Highlights Deep 4-cell design for larger seedlings Encourages healthy root growth with air-pruning slits Extra-large drainage hole for easy transplanting BPA-free, food-safe polypropylene Built for reuse season after season Made in the USA Color options for easy seedling organization Why Gardeners Love These Plug Inserts Ideal for up-potting tomatoes, peppers, and similar crops Strong root systems without circling or binding Easy to remove seedlings with minimal root disturbance Durable construction that outlasts flimsy trays Makes organizing and labeling seedlings simple Product Details Insert size: 5 1/4\” x 5 1/4\” x 4\” tall Cell size: 2 3/8\” top width, tapers to 1 1/4\” bottom Drainage hole: 3/4\” diameter Air-pruning slits: 2 1/2\” long, 1/8\” wide Soil capacity: 1 cup per cell Soil usage: 1 quart per 4-cell insert Material: FDA prime-grade polypropylene (#5, BPA-free) Tray Compatibility Fits 8 inserts per 1020 tray Fits 4 inserts per 1010 tray Not compatible with 1020 or 1010 humidity domes due to snug fit Use & Care Ideal for seed starting and up-potting Clean between uses for best results Store out of prolonged direct sunlight when not in use Designed to last at least two growing seasons with proper care A Strong Foundation for Healthy Seedlings These deep plug tray inserts give seedlings the space and airflow they need to develop strong rootsmaking transplanting easier and plants healthier from the start.