Bestseller In Stock
Chemjet® Tree Injector
Spring-loaded, reusable injector that delivers chemicals directly into the tree's vascular system. Uptake 3–4× faster than low-pressure rivals.
£15.00 · min 3
— Our Range —
Every product you need to treat your trees
The original Chemjet® Tree Injector, our 30% active-ingredient phosphite fungicide, and everything in between. In stock, shipped from the UK. New to injection? Start with our complete treatment walkthrough.
30% Active Ingredient In Stock
Potassium Phosphite
A fast-acting, highly mobile phosphite (PO3) fungicide that moves systemically through the tree. Boosts natural defences and treats Phytophthora root rot, Sudden Oak Death, canker and more.
From £15.00
Genuine Chemjet Part In Stock
Spare Injector Seals (Pack of 5)
A pack of five genuine replacement rubber seals for your Chemjet® Tree Injector. Keeps your injectors watertight and extends their working life.
£5.00
Best Value Starter In Stock
Single Tree Kit
Got just one tree to treat? This kit has everything: one Chemjet® Injector plus 100ml of Potassium Phosphite — enough for three 60cm diameter trees.
£25.00
New In Stock
4mm Drill Bit
Cobalt (M35) drill bit for drilling accurate injection holes in tough materials, with excellent heat resistance and durability.
£3.00
Fast UK Dispatch
Next-day dispatch with 24 hour UK delivery.
Secure Checkout
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Eco-Friendly
Low-pressure injection, no chemical runoff.
25+ Years Proven
Trusted by arborists in 30+ countries.