Spray2Grow Mildew Protection Spray - 500ml - Natural Powdery Mildew Defence
Best for: Growers who want to prevent and treat powdery mildew without spraying chemical fungicides on plants close to harvest.
Our thoughts
Mildew is one of those problems that's far easier to stop than to cure, and this is very much a "get ahead of it" product rather than a rescue treatment for a plant already coated in white powder. Regular foliar sprays through veg and early flower do more work here than one panicked application once you've spotted mildew.
Spray2Grow Mildew Protection Spray is a concentrate made from a blend of natural and organic plant extracts, rather than a synthetic fungicide. Diluted and applied as a foliar spray, it works by triggering the plant's own systemic acquired resistance - essentially priming its natural defences against fungal attack rather than just coating the surface with a chemical barrier.
A 500ml bottle makes up 10 litres of ready-to-use spray at the standard dilution rate, applied through a hand or pressure sprayer to both the upper and lower leaf surfaces. Because it works on the plant's own defence response rather than pure surface chemistry, it's used most effectively as a regular preventative treatment rather than a one-off cure.
How it compares
It sits in the natural/organic-extract category of plant protection sprays rather than the synthetic fungicide category.
- Plant-extract based like SB Plant Invigorator, rather than a copper- or sulphur-based chemical fungicide
- Aimed specifically at powdery mildew, unlike broader all-in-one sprays that try to cover pests and disease together
- Alternative to dedicated mildew treatments such as CX Horticulture PMT, working via plant defence activation rather than direct fungicidal action
A natural-first option for growers who'd rather build resistance into the plant than rely on a chemical spray close to harvest.
Usage guidance
Dilution
Mix 50ml of concentrate per litre of water - one 500ml bottle makes up 10 litres of spray solution.
Application
Spray as a fine foliar mist over both the tops and undersides of leaves until the solution just starts to run off the leaf tips.
Frequency
Apply regularly through veg and early flower as a preventative measure, rather than waiting until mildew is visible - it's a defence-priming product, not an instant cure.
Storage
Keep the concentrate in a cool, dark place and shake before diluting.
Technical specifications
- Format: 500ml concentrate
- Active basis: Blend of natural and organic plant extracts
- Dilution rate: 50ml per litre of water (500ml makes 10L spray solution)
- Application method: Foliar spray via hand or pressure sprayer
- Target: Powdery mildew and other fungal attack
- Mode of action: Triggers systemic acquired resistance in the plant
- Suitability: Suitable for organic growing
Who this is for
- Growers in humid grow spaces prone to recurring powdery mildew
- Anyone wanting to avoid synthetic fungicides on plants heading towards harvest
- Growers running a regular preventative spray routine rather than reactive fire-fighting
Best used as part of a routine preventative programme rather than a single rescue spray once mildew is established.
Our take
Get it into your spray routine early and it does a genuinely useful job of keeping powdery mildew off your plants without reaching for anything more aggressive. It's not an instant fix once mildew has taken hold, but that's true of most natural treatments.
One we sell a lot of for growers who'd rather prevent the problem than chase it.
