RootMASS Square Fabric Pot 37L - Breathable Air Pruning Plant Pot with Handles

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The RootMASS Square Fabric Pot 37L is a large breathable plant container designed to encourage a healthy, fibrous root system through natural air pruning. Its square shape makes efficient use of growing space, while the porous fabric construction improves root-zone aeration and allows excess irrigation water to drain freely through the pot.

With a generous 37 litre capacity, this RootMASS fabric pot provides substantially more root volume than smaller propagation and finishing pots, making it well suited to larger plants and longer growing cycles.

Integrated carrying handles make the empty pot easier to position and handle, while the flexible fabric construction means it can be folded relatively flat when not in use.

Why choose the RootMASS Square Fabric Pot 37L?

  • 37 litre capacity - generous root volume for larger plants and longer-term container growing.
  • Square footprint - makes efficient use of available floor or bench space when several pots are positioned together.
  • Breathable fabric construction - allows air to reach the outer root zone.
  • Encourages air pruning - helps reduce the continuous root circling associated with conventional rigid pots.
  • Supports fibrous root development - air pruning encourages further lateral root development within the growing medium.
  • Free-draining design - porous fabric allows excess irrigation water to escape through the container.
  • Integrated handles - useful when positioning and handling the pot.
  • Large growing volume - suitable for plants that require significantly more root space than smaller fabric pots can provide.
  • Flexible construction - folds down for more compact storage when empty.
  • Reusable - can be cleaned, dried and reused where its condition remains suitable.

Air pruning for a more fibrous root system

Roots behave differently in a breathable fabric container than they do inside a conventional rigid plastic pot. When a root reaches the solid wall of a plastic container, it can continue growing along the inside edge, eventually creating long circling roots.

The RootMASS fabric wall allows air to reach the perimeter of the growing medium. As actively growing root tips reach this aerated boundary, their extension is naturally restricted. The plant responds by producing additional lateral roots further back within the root zone.

This natural air-pruning process encourages the development of a dense network of finer feeder roots throughout the available growing medium.

Space-efficient square fabric pot

The square design offers a practical advantage when multiple containers are being positioned together. Unlike round pots, square containers can be arranged side by side with less unused space between them.

This makes the 37L RootMASS particularly useful where growing-area efficiency matters, while still providing each plant with its own substantial volume of growing medium.

Breathable sides & free drainage

A conventional plastic pot normally drains through a limited number of openings in its base. RootMASS fabric pots use a porous construction that allows moisture to move through the fabric itself.

This helps excess water drain from the root zone while increasing air exchange around the outside of the growing medium.

Because moisture can also evaporate through the fabric, watering requirements may differ from an equivalent rigid pot. Irrigation should therefore be based on the moisture level of the growing medium and the needs of the plant rather than a fixed schedule.

Suitable for soil, compost & coco-based growing media

The RootMASS 37L can be used with a wide variety of suitable container-growing media, including soil and compost mixes, coco-based substrates and other free-draining blends.

The ideal medium will depend on the crop and irrigation method. Whatever substrate is selected, avoid excessive compaction when filling the pot, as maintaining good pore space within the growing medium supports effective drainage and root-zone aeration.

Integrated carrying handles

Strong integrated handles provide convenient lifting points when positioning the RootMASS pot. They are particularly useful when setting up containers or moving them before the growing medium becomes fully saturated.

Bear in mind that 37 litres of moist growing medium plus a mature plant can become very heavy. Where possible, position larger fabric pots before filling and avoid unnecessary movement once established.

Getting the best from a 37L fabric pot

Open the pot fully and position it on a firm, level surface before filling. Add the growing medium evenly, allowing the square sides and base to take their intended shape without heavily compressing the substrate.

Fabric pots should be positioned where excess irrigation water can drain safely. A suitable collection tray can be used where run-off needs to be contained.

As plants establish, check moisture throughout the root zone rather than judging watering requirements solely from the appearance of the surface.

RootMASS Square Fabric Pot 37L product details

Brand RootMASS
Product Square Fabric Pot
Capacity 37 litres
Shape Square
Construction Breathable fabric
Handles Integrated carrying handles
Root management Designed to encourage natural air pruning
Drainage Porous fabric construction allows excess water to drain through the container
Colour Black
Storage Flexible and foldable when empty
Suitable growing media Soil, compost, coco-based & other suitable container-growing media
Suitable for Large plants & longer-term container growing

RootMASS Square Fabric Pot 37L FAQs

What capacity is this RootMASS fabric pot?

This model has a nominal growing-medium capacity of 37 litres.

Why choose a square fabric pot instead of a round one?

Square pots can be positioned closely together with less unused space between containers, making efficient use of the available growing area.

What does air pruning mean?

Air pruning occurs when actively growing root tips reach the breathable outer edge of the pot. Their extension is naturally restricted, encouraging the plant to develop additional lateral feeder roots within the growing medium.

Does the 37L RootMASS pot have handles?

Yes. The pot has integrated handles that provide convenient lifting points for positioning and handling.

Does a RootMASS fabric pot need drainage holes?

The fabric itself is porous, allowing excess irrigation water to drain through the container rather than relying solely on conventional holes in the base.

Can I use coco in this fabric pot?

Yes. The 37L RootMASS can be used with suitable coco-based substrates as well as soil, compost and other appropriate container-growing media.

Do fabric pots need watering more often?

They can dry differently from rigid plastic pots because moisture and air can move through the fabric. Watering frequency should therefore be determined by the crop, environment and actual moisture level of the growing medium.

Can the RootMASS 37L be reused?

Yes. Provided the fabric remains in good condition, the pot can be emptied, cleaned, allowed to dry thoroughly and reused.

Can I move a 37L fabric pot using the handles?

The handles provide useful lifting points, but a 37L pot containing wet growing medium and an established plant can become very heavy. It is best to position large containers before filling whenever possible.

How should I store the pot when it is not being used?

Remove the growing medium and root debris, clean and thoroughly dry the pot, then fold it for compact storage in a dry location.

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