Fabric pots are breathable grow bags, and they solve a problem plastic pots create. In a solid pot, roots hit the wall and circle. Given long enough they strangle themselves, and the plant stops using what you feed it no matter how good the feed is.
Air pruning
Fabric lets air reach the root tips at the edge of the pot. Exposed to air, the tip stops growing – and the plant responds by branching further back instead. Rather than one long circling root, you get a dense fibrous mass filling the whole volume. More root surface means more uptake, which is why the same plant in the same medium performs better in fabric.
The trade-offs, honestly
They dry out faster. Air moves through the sides, so you water more often. In a warm tent under a big light that can mean daily.
They need a saucer or tray. They weep through the base and sides – see run-off trays.
They sag when wet and are awkward to move once planted.
They stain and need a wash between crops.
Sizing
Size
Suits
1-3L
Rooted cuttings and seedlings
11L
Four plants in a 1.2m tent, short veg
18-25L
Longer veg, bigger plants
30L+
Mother plants and outdoor
Because they drain so freely, you can go slightly larger in fabric than you would in plastic without waterlogging.
Fabric or Air-Pot?
Both air-prune. Air-Pots are rigid, reusable indefinitely and hold their shape; fabric is cheaper, folds flat for storage and is gentler on the root ball when potting on. Most growers pick on price and handling rather than performance.
We are a hydroponics shop in Croydon and we run fabric in most of our own tents. Tell us your tent and veg time and we will size them. Discreet UK and European delivery, and excellent customer reviews on Trustpilot.
