Heavy Duty 72-Cell Square Plug Insert, BPA-Free, Reusable

Hydrofarm Heavy Duty 72-Cell Square Plug Insert — BPA-Free, Reusable, Polystyrene

Standard cell inserts are often designed for limited reuse — thin plastic that cracks after a season or two. The Hydrofarm CK64072 is built for growers who propagate continuously and need an insert that holds up over many growing seasons. Made from heavy-duty polystyrene with thicker walls and base than standard inserts, the CK64072 provides improved structural rigidity and longevity.

BPA-free and recyclable, the CK64072 measures 22 x 10.5 x 2.5 in and fits standard single flat trays. The 72 square cells accommodate square coco plugs, rockwool cubes, or loose growing media. For high-volume propagation operations where insert replacement costs add up, the CK64072 is a cost-effective long-term investment.

Key Features & Benefits

• Heavy-duty polystyrene construction — thicker walls and base than standard inserts for improved rigidity and resistance to cracking over repeated use.
• 72 square cells — 72 individual square cells per insert for propagation at standard density in a single flat footprint.
• Reusable for many seasons — durable construction allows repeated use over multiple growing seasons — reducing per-use cost compared to standard inserts.
• BPA-free and recyclable — BPA-free polystyrene is safer for food-adjacent growing applications and recyclable at end of life.
• Dimensions: 22 x 10.5 x 2.5 in — fits standard single flat trays; larger footprint than some standard 10 x 20 in inserts — verify tray compatibility before purchasing.

Who Should Use This Insert

High-volume propagators, commercial nurseries, and serious home growers who propagate frequently and want a heavy-duty reusable insert that outlasts standard thin-plastic options.

Polystyrene in Horticulture — Durability and BPA-Free Safety

Polystyrene is widely used in horticultural applications because of its durability, chemical resistance, and light weight. The CK64072 uses BPA-free polystyrene — free of bisphenol A, a chemical sometimes found in other plastics that has raised concerns in food-adjacent growing applications. Polystyrene is also fully recyclable (resin code 6) at facilities that accept it, making it a more sustainable choice for growers who prioritize end-of-life recyclability.

Frequently Asked Questions

What makes this insert 'heavy duty' compared to standard inserts?

The CK64072 uses thicker polystyrene material than standard inserts, giving it greater structural rigidity and resistance to cracking during handling, cleaning, and repeated use. This allows it to last for many growing seasons rather than one or two.

Is polystyrene BPA-free?

Yes. Polystyrene (PS, resin code 6) does not contain bisphenol A (BPA). The CK64072 is specifically identified as BPA-free, making it a suitable choice for food-crop propagation.

What are the dimensions?

The CK64072 measures 22 x 10.5 x 2.5 in. This is slightly larger than the standard 10 x 20 in format — verify that your tray can accommodate this insert before purchasing.

What plugs and media fit the cells?

Square cells accept square coco plugs, square rockwool cubes, and loose soil or soilless growing media.

How do I clean this insert?

Rinse with water after each use. For sanitizing between propagation cycles, a diluted hydrogen peroxide solution or commercial propagation cleaner is recommended. The heavier polystyrene construction holds up to regular cleaning better than thin-plastic standard inserts.