Pargro PAR6.5 Rockwool Block Strip - 4 x 4 x 2.6-in - Pre-Cut Holes - 6 Blocks per Strip - 216 Count

Pre-Cut Rockwool Blocks for Faster Plug Transplanting - 2.6 in Height

Transplanting plugs into uncut media takes time and risks uneven placement. Pargro PAR6.5 rockwool block strips arrive with a single pre-cut plug hole in each block, so plugs drop in quickly. The medium is designed for moisture retention and root development, with a bottom groove pattern for system compatibility.

Each unit contains 216 blocks joined in strips of 6, which suits growers running a steady volume of plants through vegetative growth and flowering. Smaller or trial setups can use the strips in portions, since each strip separates from the next.

Key Features & Benefits

• Pre-cut plug holes — plugs go in without drilling or cutting.
• Single hole sized for Grodan A-OK or Macro plugs — transplanting is straightforward with those plugs.
• Bottom groove pattern — supports compatibility with hydroponic systems.
• Strips of 6 blocks — easier handling and layout than loose blocks.
• 4 x 4 x 2.6 in blocks — a small block size for early growth stages.

Who Should Use Pargro PAR6.5 Rockwool Block Strips

These strips suit indoor and commercial growers who start plugs in a hydroponic medium and want a repeatable, ready-to-use block. They fit setups that use the groove pattern and plug sizes listed above.

About Pargro PAR6.5 Rockwool Block Strips

Pargro rockwool blocks are made by Grodan. This product is a rockwool block strip measuring 4 in by 4 in by 2.6 in, with pre-cut holes and 6 blocks per strip. It is sold as a single unit containing 216 blocks.

Frequently Asked Questions

Q: How many blocks are in one unit?
A: One unit contains 216 blocks. They are arranged in 36 strips of 6 blocks each.

Q: Which plugs fit the hole?
A: The single plug hole is made for transplanting Grodan A-OK or Macro plugs. Other plug types are not listed, so check their size before ordering.

Q: What does the bottom groove pattern do?
A: It is a set of grooves on the underside of the block that supports compatibility with hydroponic systems. Confirm the fit with your own system before ordering.

Q: What is a rockwool block compared with a plug?
A: A plug is a small starter medium for seedlings or cuttings. A block is a larger medium that receives the plug as plants grow and need more root space.

Q: Can I separate the strips?
A: Yes, each strip holds 6 connected blocks, so you can use strips as needed for the space you have.