A wide, shallow bag for grows where the canopy is spread rather than grown tall. Fifty centimetres of width gives roots room to run sideways, which matches what a trained plant is doing above the medium. Breathable fabric keeps the root zone oxygenated and stops the circling that stunts plants in solid pots.
A wide base for a wide canopy
Roots spread into the shape they are given. A tall, narrow container drives them down into a column, while a fifty centimetre base lets them run outwards under a larger footprint of medium, which is closer to how a plant roots in open ground. The low profile also keeps the centre of gravity down, and that matters once a trained plant is carrying weight on the ends of tied-down branches.
Built for screen of green and low stress training
Training methods that flatten the canopy, including screen of green, low stress training and mainlining, all aim at one wide plant filling the tent rather than a single central cola. One plant under a screen in a 4x4, or two in a 5x5, is the usual arrangement. The shallow height also keeps the medium surface lower under the light, which gives a taller screen clearance without raising the lamp.
58.9 litres, or roughly 2.1 cubic feet
Budget on one and a quarter 50 litre bags of mix per pot. Because the bag is wide and shallow the medium compacts less than it does in a tall container, so top up once after the first few waterings and the level should hold for the rest of the grow.
Watering a wide bag takes a different pattern
Water sinks faster than it spreads sideways, so emptying a can into the middle floods the centre and leaves the outer ring dry. Start in a circle around the stem and work outwards towards the edge of the bag in passes. The outer third is where most of the fine root mass ends up, and it is the part that gets missed.
