Dye makes sprayed areas visible to prevent over- or under-application and highlights any missed spots.
Commonly blue and green dyes are offered.
Typical mixes are around 1oz per gallon of spray solution, or 2–3oz per 3gal knapsack load.
Yes – dyes are generally non-toxic, water-soluble, and compatible with most herbicides, pesticides, and fertilisers.
It temporarily colours surfaces and skin but usually washes off in 24–48 hours – avoid use on delicate light-coloured areas.
No – dye can be added to any tank mix and sprayed through your usual sprayer.