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Redrock Rockwool 4" PRO Grow Block for Hydroponics | 6 Pack + Twin Canaries Chart

4.9 out of 5 stars 10 ratings

$33.63
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Enhance your purchase

  • Stone wool grow blocks are made in the USA
  • RedRock Stonewool grow blocks PRO are priced for commercial agriculture production
  • Stone wool has high fiber density makes better use of water and fertilizers while allowing dry back
  • Each block measures 4-Inch x 4-Inch x 4-Inch with 42/40 Hole
  • Comes with 6 4" Redrock Rockwool 4" PRO Starter Blocks and 1 Twin Canaries Chart

Product details

  • Package Dimensions ‏ : ‎ 33.8 x 22.1 x 9.5 cm; 460 Grams
  • Date First Available ‏ : ‎ 2 July 2020
  • Manufacturer ‏ : ‎ Twin Canaries Liquid Volume Conversion Chart
  • ASIN ‏ : ‎ B0949TQN76
  • Customer Reviews:
    4.9 out of 5 stars 10 ratings

Frequently bought together

  • Redrock Rockwool 4" PRO Grow Block for Hydroponics | 6 Pack + Twin Canaries Chart
  • +
  • 1.5" Rockwool Starter Plugs, 2 Sheets of 49 Plugs (98 Plugs Total) + Twin Canaries Chart
  • +
  • VIVOSUN pH & TDS Meter Combo +/- 0.05ph High Accuracy Pen Type pH Meter & +/- 2% Readout Accuracy 3-in-1 TDS EC Temperature M
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Product description

It is common to find propagators moving fresh cuttings into plugs for the initial stage of development. Once rooted plants are transplanted into stone wool grow blocks and then placed ontop of grow slabs to extend root zone development and access to water and nutrients. Selecting the correct substrate for your crop depends on many variables such as size, duration, density, and more. Commercial grade PRO Stone wool grow blocks manufactured from high-grade US made raw material. Stone wool grow blocks are made in the USA. RedRock Stonewool grow blocks PRO are priced for commercial agriculture production. Stone wool has high fiber density makes better use of water and fertilizers while allowing dry back. Sizes available for any crop. W/ 42/40 Hole - 15x15x13.5cm - 6-Inch x 6-Inch x 5.3-Inch.


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4.9 out of 5 stars
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Paddy Daddy Coolman
5.0 out of 5 stars Good high quality product. No complaints. Have used for about three weeks.
Reviewed in the United States on 7 October 2021
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