Sulphur 2kg — Hotbox Vapouriser Refill

Sulphur 2kg — Refill for Sulphur Vapourisers

Refill sulphur for Hotbox-style sulphur vapourisers — covers up to 100m² of grow area for effective powdery mildew prevention. Vapouriser keeps the sulphur at exactly the right temperature to volatilise (not burn), so you don't get the acrid smell of sulphur oxides associated with burning sulphur.

Why growers use sulphur vapourising:

• Prevents powdery mildew — the most effective preventative against the #1 grow-room fungal problem
• 2kg refill covers 100m² — enough for multiple vapouriser cycles across a commercial-scale grow room
• Vapourised, not burned — no sulphur oxide fumes, just the sulphur itself
• Harmless to plants when used correctly — long proven safe at recommended exposure levels
• Fits standard Hotbox sulphur vapourisers — replacement refill format

Who it's not for:

Critical usage notes: Shut off fans and seal the room (doors, flooring gaps, windows) during treatment. Do not be in the room during active vapourisation. Do not use close to harvest — sulphur residue on flowers is undesirable. Stop sulphur treatment 2-3 weeks before harvest minimum. You'll need a Hotbox sulphur vapouriser (sold separately) to use this refill.

In stock now — ships same working day from our Staffordshire warehouse with free UK delivery over £100. Pick up in-store at our Stone shop (ST15 0SR) if you're local, or click & collect at checkout.