Why the Shape of a 20 Gallon Fabric Pot Matters
Twenty-one inches across and fifteen deep is a deliberately wide, shallow proportion. Root systems in a container that shape spread laterally into a large surface area rather than spiralling around a deep cylinder. Lateral is where most feeder roots do their work anyway. The fabric is non-woven, and the whole wall breathes rather than only the drainage holes at the base. Air enters the medium from every side, which keeps oxygen available right out to the edges. It also means the pot will not hold standing water. A heavy watering drains instead of sitting in the bottom and drowning the lower roots. Empty weight is 0.55 lb, so the pot itself contributes almost nothing to what has to be lifted. The fabric also keeps the root zone cooler in heat, because evaporation through the wall carries heat away.
What Air Pruning Does to a Root Ball
A root that reaches a plastic wall turns and keeps going. It circles until the ball is a dense spiral that never uses the middle of the pot. A root that reaches fabric meets dry air instead and stops there. The plant responds by branching behind the tip. Repeat that across the whole wall and you get a dense, fibrous mass of short feeder roots rather than a few long circling ones. That is the mechanism the fabric is there for. There are two costs to be honest about. Evaporation through the wall means these dry out faster than plastic of the same volume. Watering frequency goes up in a warm room, and the pot wants a surface that drains. And they wick, so a fabric pot standing in a tray of runoff will pull it back up. Lift them onto saucers or a bench and the problem disappears.
Key Features
- Volume: 20 gallons, in a wide rather than a deep proportion
- Dimensions: 21 inches in diameter by 15 inches in height
- Material: High quality non-woven fabric across the whole wall
- Aeration: Air enters from every side, not only through base holes
- Drainage: The wall will not trap water, so heavy watering drains away
- Root temperature: Evaporation through the fabric keeps the root zone cooler
- Empty weight: 0.55 lb, so the pot adds nothing to the lifting weight
- Trade-off: Faster dry-back than plastic, so watering frequency rises
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 725835 |
| Brand | Gro Pro |
| Volume | 20 gallons |
| Diameter | 21 in |
| Height | 15 in |
| Material | Non-woven fabric |
| Colour | Black |
| Handles | Not fitted on this model |
| Empty weight | 0.55 lb |
| Aeration | Through the full wall surface |
| Drainage | Free draining, with no standing water held |
| Reusable | Yes, the fabric is washable between crops |
| UPC | 850273003631 |