Spraying a large area without a marker is a guessing game — it is easy to miss a strip or double up on another, especially in windy conditions or thick growth.
A temporary blue spray dye shows exactly where you have sprayed. This guide covers how much to add and how long the colour lasts.
In this article, we’ll explore:
What is TRU BLU Blue Dye?
Key Benefits of Using TRU BLU
Application Rates & Instructions
Tips for Safe & Effective Use
Storage, Disposal & Safety Precautions
Why Choose Garden Nursery Products?
What is TRU BLU Blue Dye?
TRU BLU is a temporary spray indicator dye that mixes with water-based solutions. It’s designed for use with pesticides, fertilisers, growth regulators, termiticides, and other sprays.
The vivid blue colour allows you to instantly see which areas have been treated, preventing skips, overlaps, or blocked nozzle issues. Over time, the colour naturally fades with sunlight and moisture, leaving no permanent marks on plants, soil, or surfaces.
Available in 1L, 5L, and 20L containers, it’s ideal for everyone from weekend gardeners to large-scale growers.
Key Benefits of Using TRU BLU
Accurate Coverage – Easily track sprayed areas.
Cost Savings – Avoid unnecessary reapplications and product wastage.
Time Efficiency – Spot skips and nozzle issues immediately.
Safety – Reduce over-spraying that can harm plants or the environment.
Versatility – Compatible with most spray systems and solutions.
Application Rates & Instructions
Boom Sprayers
Mix 225–300mL per 100L of water-based spray solution.
Adjust according to foliage colour and height.
Hand Sprayers & Knapsacks
Mix 22–30mL per 10L of water-based spray solution.
Adjust according to foliage colour and height.
Tip: Always add TRU BLU to the spray tank last unless otherwise stated on the pesticide or fertiliser label.
Tips for Safe & Effective Use
Ideal for spot spraying with selective herbicides.
Excellent for marking trial plots and strips.
Prevents over-spraying by visually identifying treated areas.
Storage, Disposal & Safety Precautions
Do not allow spray residue to enter drains, sewers, ponds, or streams.
Store in original sealed containers in a cool, ventilated area away from direct sunlight.
Keep out of reach of children.
Recycle empty containers where possible. If not, dispose of them at an approved waste facility.
Do not burn empty containers.
First Aid
If swallowed: Rinse mouth. Do not induce vomiting.
If skin irritation occurs: Wash thoroughly with water and seek medical advice.
If eye irritation persists: Get medical attention.
For emergencies, contact the Poisons Information Centre on 13 11 26.
Why Choose Garden Nursery Products
At Garden Nursery Products, we supply quality solutions for professional growers and passionate gardeners. Whether you’re looking for fertilisers, pesticides, soil conditioners, or application tools, we stock a wide range of premium products to keep your plants thriving. Ready to spray smarter? Visit our store or shop online.