RedRock® Starter Block PRO w/ 42/40 Hole, 4"x4"x4" (Single)

One Single (1 pcs.) RedRock® Starter Block PRO w/ 42/40 Hole - 10x10x10cm - 4-Inch x 4-Inch x 4-Inch

Commercial grade pro stone wool starter blocks manufactured from high-grade US made raw material.

• RedRock Stone wool is made in the USA
• Wetting agent ensures nutrients are immediately plant available
• The high fiber density of the stone wool starter blocks makes better use of water and fertilizers while allowing dry back
• Our stone wool starter blocks are priced for commercial agriculture production
• Sizes available for any crop
• RedRock stone wool starter blocks are processed in Canada
• This white label product was sold to the largest cultivators in North America for years and is now available to you

About RedRock Blocks

• High-density material offers ample support and water retention for plants of any size, and ensures that the blocks will maintain their shape during handling.
• Sterile, UV-blocking wrapper protects roots and fits tightly to keep water and nutrients in the root zone.
• Specially-developed wetting agent provides efficient, uniform saturation and optimized nutrient uptake with a water holding capacity of 85-95%.
• Pre-cut squares ensure perfectly uniform, repeatable spacing for grow blocks-no measuring or guesswork required.
• Red Rock Blocks, Slabs, and Plugs are manufactured from at least 70% recycled material. 

Select Grow Media For Commercial Use

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.

How To Use RedRock Stone Wool Starter Block PRO Cubes

1. RedRock blocks are ultra-durable and made from premium material, but they should still be handled with care; Always keep mineral wool dry until use.
2. Saturate plugs by spraying with nutrient solution or submerging them for about one minute. Squeeze gently or let them drain for a few seconds before placing them onto slabs.
3. Transplant starter plugs into the blocks' pre-drilled holes.
4. As your fertigation system circulates nutrients and water to your plants, RedRock's specialized wetting agent will deliver it evenly throughout your plants' root zone.