T.O. Plastics Square Plug Tray - 392 Cell - 14x28 - 0.70in x 1.15in D - Black - 50pc

Square Plug Tray for High-Density Seedling Production, 392-Cell 14x28

Dense seedling production needs a tray format that packs in as many cells as the crop allows without sacrificing enough soil volume to matter, and that ratio changes depending on what is being started. T.O. Plastics' Square Plug Tray line covers that range with 11in W x 21.22in L trays offered in several cell counts, each with an optional top support slotting system to keep the tray rigid when fully loaded.

Each cell in this 392-cell, 14x28 tray measures 0.70in top x 1.15in D (0.37 cu in), and cases ship 50pc for production runs needing this density.

Key Features & Benefits

• 11in W x 21.22in L footprint — keeps the same outer tray dimensions across every cell count in the line.
• Optional top support slotting system — adds rigidity to a fully loaded tray during handling.
• Square cell design — uses the tray footprint efficiently compared to round cells at the same spacing.
• Black, sold per case — ships ready for commercial-scale seedling production.

Who Should Use This Tray

This fits commercial seedling and liner producers who need a specific cell count and per-cell volume for their crop, choosing the plug tray size that matches how much root room that crop needs before transplant.

About T.O. Plastics

T.O. Plastics has been in the thermoforming business since 1948 and now ranks among the top 100 thermoformers in North America, operating two plants in Clearwater and Otsego, Minnesota. Ownership by Otter Tail Corporation supports a manufacturing process built around reclaimed plastic resin.

Frequently Asked Questions

Why do the cell counts vary so much across this line?

Different crops need different amounts of root volume before transplant, so T.O. Plastics offers this tray in cell counts ranging from about 70 to nearly 400 cells across the same outer footprint. A higher cell count trades per-cell volume for more plants per tray.

What does the top support slotting system do?

The optional top support slotting system reinforces the tray's rigidity when it is fully loaded with wet media, reducing sag or flex during handling. It is particularly useful on higher-density trays where cell walls are thinner.

How do the different cell counts fit the same outer tray size?

Every cell count in T.O. Plastics' Square Plug Tray line shares the same 11in W x 21.22in L outer footprint, only the internal cell walls change. That keeps trays interchangeable on the same benching or handling equipment regardless of cell count.

What is the cell volume on the 392-cell tray?

Each cell measures 0.70in top x 1.15in D, giving 0.37 cubic inches of soil volume across the 14x28 layout. That is a higher plant count per tray with less volume per cell compared to the other cell counts in this line.