The Tree Irrigator Bag is a simple, yet highly effective watering system designed to support healthy tree growth by delivering water slowly and directly to the root zone. Ideal for new tree planting projects, this bag ensures young and established trees receive deep watering, reducing water waste and promoting stronger root development.
Constructed from durable green polyethylene with scrim reinforcement, and equipped with black polypropylene straps and robust nylon zippers, the bag is UV stabilised to resist sun damage, making it perfect for outdoor use throughout the year. It fits trees with trunk diameters between 3cm and 8cm in its single-bag form, and for larger trees (10cm to 20cm diameter), a convenient Double Bag setup (two single bags zipped back-to-back) is available.
The irrigator bag releases water gradually through two controlled outlets over 2 to 6 hours, depending on soil type and weather conditions, ensuring deep soil penetration and preventing runoff or evaporation. It holds approximately 75 litres of water per single bag and can be refilled once a week for optimal tree hydration.
Watering Capacity and Frequency Chart
Tree Irrigator Bag Setup Trunk Diameter (Caliper) Approximate Water Capacity (Per Single Bag) Recommended Fills/Week
Single Bag 3 – 5 cm (1 – 2 inches) 75 Litres 1 Fill/Week
This watering schedule ensures trees receive consistent moisture, supporting healthy root establishment and growth.
Applications and Benefits
Perfect for tree planting in residential gardens, commercial properties, urban streets, and public green spaces
Ideal for councils, local authorities, landscaper contractors, and professional gardeners looking to establish or maintain healthy trees
Provides slow, controlled irrigation that promotes deep root growth and reduces water wastage
UV stabilised for durability and repeated use outdoors
Easy to fill with a hose up to 8cm diameter through the wide opening
Simple installation with adjustable straps fitting trunks from 3cm to 8cm diameter (single bag) or up to 20cm diameter (double bag)
Helps improve survival rates of newly planted trees by ensuring consistent moisture delivery

Material: Green polyethylene with scrim reinforcement, black polypropylene straps, nylon zippers
Dimensions: 76cm tall x 46cm wide (at base) when full
Tree Diameter (Trunk Caliper): Single Bag – 3cm to 8cm; Double Bag – 10cm to 20cm
Water Capacity: Approximately 75 litres per single bag
Water Release: Two outlets releasing over 2 to 6 hours
Fill Opening: Fits hose up to 8cm diameter
UV Protection: Yes, UV stabilised for outdoor durability
Recommended Watering Frequency: 1 fill per week for single bag setups