Mondi Propagation Tray 10 x 20, No Holes, Heavy-Duty 1020 Flat

Mondi Propagation Tray: A 1020 Flat Made to Last

This is a standard 1020 flat, the size most domes, plug sheets and cell inserts are built around. The bottom is solid, with no drain holes, so it holds water instead of passing it through. Deep, continuous channels run across the floor of the tray. Wide, level ridges sit between them, giving plugs, inserts and small pots a flat surface to rest on. Water settles into the channels rather than pooling under the root zone. The sides and lip are reinforced, and the plastic is thick with added UV protection. That build lets the tray keep its shape under lights and through repeated washing. The rim stays rigid even when the tray is full of wet media. The ends are engineered for extra strength and give your hands a firm place to grip. A loaded tray can move from bench to sink without bowing in the middle. Empty trays nest together for storage and pull apart without sticking. The Hawthorne item number is 726150.

Working With 10x20 Trays Without Holes

A solid flat is the base of most bottom-watering setups. Set a cell insert or a holed tray inside it, then pour water or a mild feed into the flat. Plugs draw moisture up from below, which keeps the surface drier and less inviting to fungus gnats. Pour off what remains after about half an hour so the media does not sit waterlogged. Under a cloning tray, the solid flat catches drips that would otherwise land on the bench. It also works as a carrier, holding a full insert steady from one station to the next. Pair it with a humidity dome sized for 1020 flats when starting seeds or rooting cuttings. Plastic this thick handles a hot wash and a sanitizing dip between crops. Rinse out the channels after each run, since old media and roots collect there. Stack clean, dry trays in a shaded spot until the next round. Keep a few spares on hand, as one flat often ends up doing duty under every tray on the rack.

Key Features

• No drain holes: Holds water for bottom feeding and catches runoff.
• Standard 1020 size: Fits domes, plug sheets and inserts built for 10 x 20 flats.
• Deep channels and level ridges: Keep water from pooling and give media a stable base.
• Reinforced sides and lip: Thick, UV-protected plastic holds its shape under lights.
• Engineered tray ends: Add strength and a firm grip for carrying a full tray.
• Nesting design: Stacks for storage and separates without sticking.

Technical Specifications