Block Covers
HBX Block Covers are purpose-built for growers who want a cleaner, more controlled root zone. Designed to fit 4" and 6" rockwool blocks (as well as other compatible growing media), these black/white dual-layer covers help suppress algae growth, reduce evaporation, improve root-zone stability, and maintain a consistent environment around each plant.
Whether you're running a high-performance indoor cultivation facility or dialing in a small home grow, HBX Block Covers are one of the simplest and most effective tools to keep your substrate clean and efficient from veg to flower.
- 6 Mil Black/White Poly
- 1/2" Center Hole
- 1/4" Drip Stake Holes
- Prevents Algae And Mildew Growth
- Reflects Light Back Towards Plant
- 40 count
HBX Block Covers are purpose-built for growers who want a cleaner, more controlled root zone. Designed to fit 4" and 6" rockwool blocks (as well as other compatible growing media), these black/white dual-layer covers help suppress algae growth, reduce evaporation, improve root-zone stability, and maintain a consistent environment around each plant.
Whether you're running a high-performance indoor cultivation facility or dialing in a small home grow, HBX Block Covers are one of the simplest and most effective tools to keep your substrate clean and efficient from veg to flower.
- 6 Mil Black/White Poly
- 1/2" Center Hole
- 1/4" Drip Stake Holes
- Prevents Algae And Mildew Growth
- Reflects Light Back Towards Plant
- 40 count
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Explore Harvest Supplies
From harvest to cleanup — HBX consumables are the ones commercial growers reach for when it matters.
Shop Full CollectionWhy Growers Choose HBX
Part of the HydroBuilder Holdings family — the same group behind 3 trusted cultivation brands and 80+ years of industry expertise. Every HBX product is built to the standard commercial operations demand, at a price that works for every grower.
Trusted Quality
Part of HydroBuilder Holdings — the group behind 3 trusted brands and 80+ years of expertise.
Value Driven
Professional tools at prices that work for your operation — commercial quality without the commercial markup.
Commercial Grade
Designed for real grow operations — from single-room setups to commercial-scale facilities.
