Grow1 Square Grow Lids - 8 x 8-in - 40 Count

Dual-Sided Light Control for Growing Media - 8 x 8 in

Exposed growing media lets light in, and that invites algae, mildew and pests. These square lids cover the surface with a black face that blocks light, while the white face points up to reflect light back toward the plants. The sheet is 5.5 mil thick, so it holds its shape in use.

Each unit holds 40 lids, which suits growers covering many containers or sites in one run, from a regular indoor setup to a larger room. Hobbyists can use a unit across several seasons of containers.

Key Features & Benefits

• Dual-sided design — white reflects light, black blocks it.
• 5.5 mil thickness — a sturdy sheet that keeps its form.
• Square 8 x 8 in shape — fits square pots and sites.
• Low profile — about 0.3 in tall.
• 40 lids per unit — covers many sites from one order.

Who Should Use Grow1 Square Grow Lids

Growers who want to cover media surfaces in hydroponic systems or containers, limit light reaching the media, and reflect light toward plants during vegetative growth or flowering.

About Grow1 Square Grow Lids

Grow1 Square Grow Lids are dual-sided covers with a white reflective face and a black light-blocking face. They measure 8 x 8 in, are 5.5 mil thick, and are sold as 40 lids per unit. Grow1 also lists a round variation.

Frequently Asked Questions

Q: Which side faces up?
A: The white face reflects light, so it normally faces up toward the light source. The black face goes against the media to block light.

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

Q: How many lids come in one unit?
A: One unit contains 40 square lids, each 8 x 8 in.

Q: What does mil mean?
A: A mil is one thousandth of an inch. These lids are 5.5 mil thick.

Q: Do they come in other shapes?
A: The line also offers a round variation. This listing is for the square lid.