Compared across 4 stores. Prices are checked against each store and labelled with when.
It checks today's price at every store, compares the alternatives and answers in about a minute.
Cultiwool 8 x 8 x 8 blocks are stone wool cubes for starting and growing plants in hydroponic and drip-fed setups. Each block has a donut ring around the plug hole that acts as a water chamber for drippers, cross grooves and drain grooves underneath, and black/white foil to block algae. The donut ring is the standout feature: it spreads water evenly and makes dripper placement hard to get wrong. Compared with plain stone wool cubes, they cost more effort per block but suit growers who want repeatable watering on tables or slabs.
In stock
In stock
In stock
In stock
Lowest price we've seen: $116.42 on Nov 7 at Hydrobuilder.com. Tracked across 4 stores since Nov 7.
Growers who use Cultiwool blocks praise the even watering and the donut ring, which makes dripper placement forgiving. Some find the foil and block size awkward to handle and note that stone wool still demands careful watering.
These Cultiwool blocks are growing substrate made of stone wool (rockwool). Each block measures 8 x 8 x 8 inches (203 x 203 x 203 mm) and has one plug hole, 38 mm / 40 mm. The stone wool takes up water quickly and distributes it evenly throughout the block.
A donut ring, a water chamber around the plug hole, holds the drippers. It helps spread water evenly through the block and fixes the dripper position. Cross grooves and drain grooves on the bottom improve water flow under the block. The drain grooves also reduce contact with cultivation tables or concrete floors.
A black/white foil covering helps prevent algae growth. The blocks are sold by the case.