Stack of On The Grow 128-cell plug trays showing reusable seed starting trays in a 10-pack
Single On The Grow 128-cell plug tray with 1-inch cells for seed starting and plant propagation
On The Grow 128-cell plug tray in standard 10x20 size shown from front-to-back perspective
Top view of On The Grow 128-cell plug tray showing uniform cells and drainage holes

128-Cell Plug Trays for Seed Starting – 10-Pack, 10×20

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On The Grow 128-Cell Plug Trays for Seedlings

10-Pack | 1,280 Total Plant Starts | Standard 10×20 Size

Start more plants in less space with these 128-cell plug trays, designed for efficient seed starting, uniform germination, and easy transplanting. Each tray features 128 individual 1-inch cells, giving you a total of 1,280 plant starts per 10-pack—ideal for growers who want consistency, organization, and scalability.

These plug trays are a solid option for home gardeners, indoor growers, educators, and small-scale farms looking to streamline propagation without investing in premium-priced options.

Why Growers Choose These 128-Cell Plug Trays

High-Density Seed Starting: Each tray holds 128 evenly spaced cells, allowing you to start a large number of seedlings in a compact footprint. Perfect for batch planting and efficient use of grow racks, tables, or greenhouse space.

Reusable & Flexible, Yet Sturdy: Made from Polystyrene (PS) plastic, these trays offer a balance of light flexibility and structural strength. They hold their shape during use while still allowing for easier plant removal during transplanting.

Optimized Drainage: Each cell includes a 0.314-inch drainage hole, promoting proper water flow and reducing the risk of waterlogging or damping-off issues during early growth stages.

Standard 10×20 Tray Size: Compatible with common 10×20 trays, racks, humidity domes, and watering setups—making them easy to integrate into existing grow systems.

Best For

  • Home gardeners starting multiple varieties at once
  • Indoor growers using shelves or grow racks
  • Educators and classrooms teaching plant propagation
  • Market gardeners and small farms producing uniform plant starts

Ideal Uses

  • Seed starting
  • Plant starts for transplanting
  • Vegetables, herbs, flowers, and leafy greens
  • Indoor growing, greenhouse use, and classroom education
  • Market garden and small farm propagation

Product Specifications

  • Cells per Tray: 128
  • Cell Size: 1 inch per cell
  • Drain Hole Size: 0.314 inch
  • Tray Size: Standard 10×20
  • Material: Polystyrene (PS) Plastic
  • Pack Size: 10 trays per purchase
  • Total Plant Capacity: 1,280 starts

Care & Use Notes

CRITICAL - Heat Sensitivity: Polystyrene cannot tolerate heat. Hand-wash with cool water only—no hot water, no dishwasher, no steam, no heat mats underneath. Heat exposure will warp or damage trays.

Between uses: Rinse thoroughly, allow to dry completely before storage.

Storage: Keep out of direct sunlight when not in use to extend tray lifespan.

Best use: Seed-starting mixes or appropriate propagation media.

Durability: These trays are reusable with proper care and handling. They're not as heavy-duty as premium options like Bootstrap Farmer plug trays, but they offer good value for budget-conscious growers who handle them carefully.

Important Product Information

  • These are NOT Bootstrap Farmer brand trays
  • Material is polystyrene (PS) plastic, not polypropylene (PP)
  • Cannot withstand heat—cool water cleaning only
  • Budget-friendly alternative to premium plug trays

1,280 plant starts in a compact, organized system—efficient seed starting without the premium price.