• 888-815-9763 Sales & Support Mon - Fri, 8am - 5pm PST. Instagram Facebook Twitter Google + Youtube



Save Now on Top Brands Like Twister, CenturionPro and Trimpro... Up To $600 off! Shop Now


Grodan Medium Water Absorbent Granulate, 3.5 cu ft

Item #: 713090

Be the first to review this product

Your Price:

In Stock

In stock items ship within 24 hours

100% Discreet Shipping Price Match Guarantee The HB Difference

Warranties | Returns & Replacements

Grodan Medium Water Absorbent Granulate, 3.5 cu ft

Additional Images


Product Documents

Grodan Rock Wool MSDS

If you're growing water hungry plants in containers then Gro-Wool is a good idea.

Gro-Wool can support house plants while watering just once every 2 to 4 weeks. When growing in clay pellets mix in Gro-Wool to make water and nutrient distribution more uniform and have a moisture buffer in case the pump fails. Gro-Wool also promotes fine root growth which leads to larger more vigorous growth.

TIP: If you are using a drain-to-waste system, then you do not need to pH condition the Gro-wool. Just fully saturate the wool with a pH 5.5 nutrient solution.


  • On its own as a potting mix.
  • Mix with any potting mix to improve aeration and water holding capacity.
  • Mix water Gro-Wool into your sandy garden soil to improve water holding capacity.


Brand Grodan
SKU 713090
Weight (lb.) 40
Length (in.) 39.5
Width (in.) 24
Height (in.) 7
Free Shipping No
Grow Media Rockwool
OMRI Certified No

Grodan Medium Water Absorbent Granulate, 3.5 cu ft Videos

Shipping Info:

Ships Via FedEx/UPS

Questions about this product?
Contact us for advice or more details. Our product specialists are here to help.
Email an Expert
Report an issue on this page

Why Shop with Hydrobuilder?
We offer the best service and support in the industry. Your complete satisfaction is our goal.