Mona Plant System Rings

Mona Plant System Rings have been specifically developed to irrigate planters and a trees rootball effectively and efficiently.


It is the most efficient method of ensuring quick establishment and a healthy start for vegetation and their root development. The rings also provide a more robust solution to the watering of newly planted trees. The reservoirs surround the rootball to provide a continuous source of  water. 
The Mona Rings have been installed on many high-profile projects across the UK, Europe, USA and Middle East. They continue to be one of the most popular and effective solutions for tree and plant irrigation due to how resourceful they are.

Mona Plant Systems Ring Benefits

  • Suitable for large tree establishment
  • Perfect in large decorative planters for consistent watering
  • Ideal for both interior and exterior landscaping projects
  • Particularly suited in hard landscaped areas with rootball trees
  • Ideal for deep planting
  • A durable and robust irrigation solution

Mona Plant System Rings Specification

Model Internal Diameter External Diameter Water Volume
Ring 24 180cm 220cm 96L
Ring 77 165cm 190cm 28L

Estimated Tree Watering Requirements

Feathered Light
Standard Selected
Heavy Standard Extra Heavy Semi
Girth (cm) 6 6-8 5-10 10-12 12-14 14-16 16-18 18-20 20+
Height (m) 1.8-3.0 2.4-2.7 2.7-3.0 3.0-3.6 3.6-4.2 4.2-4.8 4.8-5.4 5.4-6.0 6.0+
Estimated daily
transpiration rates (litres)
1 1 1.2 2 3 4 5 6 7+
Suggested first season
summer watering
requirements (ltrs/month)
36 36 45 75 115 150 190 220 300+


Mona Plant System Ring Installation


  1. Measure the dimensions of the rootball or planter and select the correct size Mona Ring. For bespoke sizes, please
    contact the team
  2. Cover with growing media, ensuring there is a 150mm depth between roots/rootball and the Mona Plant System Ring
  3. Ensure the upright filler pipe stands proud of the nursery line/planter
  4. Back-fill with growing media and plant as per specification
  5. Fill with water until the float within the filler pipe rises to the fill level

Mona Plant System Ring: How it works

Step 1
Mona tanks are filled with water via a filler pipe above the ground.

Step 2
The Mona tanks act as reservoirs to hold the water.

Step 3
Roots absorb water through the process of capillary action 1 as required.

Step 4
A healthy rootball establishes.

NBS Clause

Section Clause NBS Clause Title
Q31 512 Tree pit irrigation and ventilation accessories
90-15-40 429 Plant and tree pit irrigation

Downloads and Datasheets