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  • Grodan Rockwool Cubes (1.5 Inches) 45 Per Pack
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Grodan Rockwool Cubes (1.5 Inches) 45 Per Pack

by Grodan
| 11 answered questions

List Price: $14.95
Price: $13.23 & FREE Shipping on orders over $35. Details
You Save: $1.72 (12%)
Only 5 left in stock.
Sold by Hydroponics Market and Fulfilled by Amazon. Gift-wrap available.
  • An inorganic and sterile growing medium made from spun molten rock
  • A superior medium for rooting cuttings
  • Provides 20% air space when saturated
  • Does not contain nutrients
  • Condition by soaking for eight hours
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Frequently Bought Together

Grodan Rockwool Cubes (1.5 Inches) 45 Per Pack + General Hydroponics GH1514 Ph Control Kit + Leca Clay Orchid/Hydroponic Grow Media - 2 lbs.
Price for all three: $37.25

Buy the selected items together


Product Details

  • Shipping Weight: 7.2 ounces (View shipping rates and policies)
  • ASIN: B0002IU8UW
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (127 customer reviews)
  • Amazon Best Sellers Rank: #822 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)

Product Description

Three strips of 15 wrapped Mini-Blocks - 45 total blocks each measuring 1.5 in. square.

Customer Reviews

They do fit perfect into 3.75 net pots.
Tony
Grodan Rockwool Cubes, used with Rootech cloning gel, worked great!
Linton, KY.
Be sure to use "Distilled" water for a perfect 5.5 ph.
John Edward Barrett

Most Helpful Customer Reviews

23 of 26 people found the following review helpful By Mark on June 13, 2012
Verified Purchase
Been using the rockwool cubes a while now and they really perform well for me. I really like how they come individually wrapped in the sheets as that allows you to leave the wrapper on and lets me focus the root growth down (not a big issue just keeps any from coming out the lower sides of the mesh baskets where the misters might not completely cover the roots). They work great in hydroponic systems but are also pretty cool if you own one of those little indoor kitchen gardens for herbs and whatnot, you can tear off little pieces of these cubes and use them in that which is alot cheaper than buying their 'custom' ones.
Advice: the ph for cubes like this is a little higher than you will want for some growing, take some water and add your ph down solution OR you can use distilled white vinegar thought I have not found the vinegar to be quite as effective. You really want the ph in the cubes anywhere from 5.5-7.0, I usually aim for 6.0-6.5 and have no issues.
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30 of 35 people found the following review helpful By edibill on October 30, 2011
Verified Purchase
Well, they do as advertised. Great for rooting cuttings. Soaked them in clonex
solution for about 5 minutes, inserted the cutting. Kept the cubes moist and under
strong lighting and in 2 weeks had roots on my cuttings. Jade trees of course..what
are you going to use them for??
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12 of 13 people found the following review helpful By K. Burnside on June 13, 2013
Verified Purchase
Purchased this pack to go with our Tower Garden from Juice Plus. The cubes fit perfectly in the net pots, and these were much cheaper than ordering from elsewhere.
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8 of 8 people found the following review helpful By Johnny Q on December 26, 2013
Verified Purchase
In my own humble opinion, these cubes work better than the A-ok plugs. More stable, hold moisture better, and the wool itself seems to be of higher quality.
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7 of 7 people found the following review helpful By David Vicik on April 15, 2014
Verified Purchase
These cubes makes starting plants from seed very easy. Once the seed has sprouted, it also makes it very easy to transplant because you can just pick up the cube with the sprouted seedling and stick the whole block in the hole. The blocks also support the young plant in its early stages of growth.
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8 of 9 people found the following review helpful By E. S. Noyes on November 10, 2010
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These rockwool cubes are a good way to start cuttings. Light, sterile, easy to handle and affordable. They do the trick.
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4 of 4 people found the following review helpful By Night on May 6, 2014
Verified Purchase
This is a fantastic planting medium, but I wish it was cheaper I had about a 90% grow rate. I prefer these because I hate working with soil indoors and I avoid it when I can afford to :). I use them along with pH down and I get healthy sprouts within days.
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7 of 9 people found the following review helpful By J. J. Park on July 9, 2013
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These cubes are awesome in raft systems. I was using the baskets with hydrotons and I hated them. A must buy for any aquaponics system. Just heat up a 1 1/2" pipe and melt holes in the styrofoam and pop these babies neatly in the holes for the perfect grow (do some practice holes on a scrap piece till you get what you want!!!!).
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