Grow1 Square Grow Lids - 3-in - White/Black Dual-Sided - 40 Count

Cover Growing Media and Control Light - 3-in Square - 40 Count

Exposed growing media invites algae, mildew and pests, and it wastes light that should reach your plants. These dual-sided lids cover the surface with a black face that blocks light and a white face that reflects it. The sheet is made from 5.5 mil material.

Each unit holds 40 lids in a 3-in square format. That suits hobbyists running a small tray or trial, and growers who want a consistent cover across many small sites in an indoor or hydroponic setup.

Key Features & Benefits

• Dual-sided design — choose the white face to reflect light or the black face to block it.
• Black face light blocking — helps limit algae, mildew and pests at the media surface.
• 5.5 mil thickness — a sturdy sheet that holds its shape during handling.
• Square 3-in format — covers small containers and plugs.
• 40 lids per unit — enough to cover a full tray or several small systems.

Who Should Use Grow1 Square Grow Lids

Home gardeners and licensed commercial growers who cover small containers or starter sites during vegetative growth or flowering will find these useful, especially in hydroponic systems where light on wet surfaces encourages algae.

About Grow1 Square Grow Lids

Grow1 Square Grow Lids are dual-sided cover sheets with a white face and a black face, made from 5.5 mil material. The distributor also lists a round version. This listing is the square style, supplied as 40 lids per unit.

Frequently Asked Questions

Q: Which side faces up?
A: Use the white face up to reflect light, or the black face up to block light. Pick the side that matches your goal for that stage of growth.

Q: How many lids come in a unit?
A: Each unit contains 40 lids. The product is sold as a single unit.

Q: Why block light at the media surface?
A: Light reaching damp media encourages algae and mildew. A black face blocks that light and helps with algae, mildew and pest control.

Q: What does mil mean?
A: A mil is one thousandth of an inch, a common measure of sheet thickness. These lids are 5.5 mil thick.

Q: Are these round or square?
A: This listing is the square style. The line also comes in a round variation, sold separately.