6 in Square Grow Lids - White/Black Dual-Sided - 40 Count

Cover Growing Media and Reflect Light - 6 in Square

Uncovered growing media lets light in, and that invites algae and mildew. These dual-sided lids give you a black face to block light and a white face to reflect it. Pick the face that suits your setup and place the lid over the medium. Each lid is 5.5 mil thick.

This 6 in square size suits a hydroponic or indoor setup with small square sites. Each unit holds 40 lids, which covers a small room or a trial run without a large order.

Key Features & Benefits

• Dual-sided design — a white face reflects light and a black face blocks it, so one lid serves either purpose.
• 5.5 mil thickness — a firm sheet that handles repeated placement.
• 6 x 6 in square shape — fits square sites and covers the surface evenly.
• Thin profile — each lid is 0.3 in high, so it stores flat and takes little space.
• 40 lids per unit — enough to cover many sites at once.

Who Should Use 6 in Square Grow Lids

Home gardeners and licensed commercial growers who want to cover growing media in hydroponic systems or indoor cultivation spaces. They suit anyone managing light exposure at the surface of the medium.

About Grow Lids

This product is a 6 in square, dual-sided grow lid with a white face and a black face. Each lid measures 6 x 6 in and is 5.5 mil thick. The unit holds 40 lids and weighs 0.3 lb as shipped. The distributor describes the black face as helping with algae, mildew and pest control.

Frequently Asked Questions

Q: Which side should face up?
A: Use the white face up to reflect light. Use the black face up to block light from the medium. Choose based on what your setup needs.

Q: Why cover growing media at all?
A: Light reaching damp media can encourage algae and mildew. A cover blocks that light and reduces the problem.

Q: What does mil mean?
A: A mil is one thousandth of an inch. It is a standard way to state sheet thickness, and 5.5 mil is the thickness of these lids.

Q: How many lids come in one unit?
A: One unit holds 40 lids. Each lid measures 6 x 6 in.

Q: Are these lids available in other shapes?
A: The distributor lists both round and square versions. This listing is for the square version.