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Greens Horticulture - Serving Growers All Over The UK


Regular price £29.66 £32.95 | Save £3.29 (9% off)
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SKU: 2734
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1l - £29.66
  • 250ml
  • 1l - £29.66



Pythoff is an effective sterilising agent designed to ward off pests and disease in hydroponic systems. Once added to your nutrient solution, regular use of Pythoff will help protect your plants from a range of diseases, fungi, and parasitic organisms known to cause root-rot, in particular pythium.

Although hydroponic systems are free from soil-borne pests and diseases, the nutrient solution is often exposed to airborne pathogens that can cause major damage to your plants. Common pathogens that can cause havoc in hydroponic systems include pythium, phytophthora, and fusarium, all of which cause the roots to turn brown and eventually irreversible plant death.

Pythoff is safe and non-toxic and is non-systemic which means it can be used safely from seedling to harvest. Although we would recommend halving the manufacturers dosage instructions until your young plants have fully established themselves.

Root-rot is every hydroponic growers nightmare and can completely destroy an entire system in a matter of days. Pythoff is designed to combat root-rot by preventing it in the first place. It can be used as a treatment for the very early stages, but as root-rot can quickly cause havoc in your system we always recommend that its better to use this as a sterilising agent from the start.

Pythoff will sterilise anything it comes into contact with which means all drippers, reservoirs, and surfaces in your hydroponic system will be sterilised and protected from pathogens that affect hydroponic systems. Highly recommended for all hydroponic growers as Pythoff can be used safely in all hydro systems.

Key features of Pythoff include:

  • Sterilising agent suitable for all hydroponic systems
  • Can treat root-rot if caught early enough
  • If used regularly will remain active through the entire growth cycle
  • Suitable for use from seedling to harvest
  • Protects and prevents plants from harmful pathogens



Delivery Information

Most orders are shipped within 24 hours.

Orders are currently shipped with Parcelforce (Express 24 service for standard and heavy/bulky items) or DPD Local (Premium next-day), a signature will be required on delivery. We have been shipping orders for 15 years and our courier choices are subject to change as service levels fluctuate.

All orders are shipped on a next day courier service – you will be informed via email or SMS the evening your order leaves us so you know to expect it the next day. On the morning of delivery you will get another SMS or email informing you of the expected delivery time.

If you have any questions on delivery please get in touch.

As the website calculates some charges by weight it is possible that shipping is not calculated correctly. We reserve the right to get in touch in these circumstances we will request the additional amount or offer to refund the order.

UK Delivery

Standard delivery to the UK Mainland addresses (excluding Scottish Highlands & Islands, offshore and N.I.) is charged at a flat rate of just £5.95 per order or £7.95 (for the premium next-day service), standard delivery (with Parcelforce) is free* for orders over £50.

*Large and/or heavy items attact a surcharge from our courier - shipping surcharges are calculated per item and are applied regardless of order value.

Non-UK mainland destinations are charged by weight.

International Delivery

Coming soon…

Collect in Store (Bristol)

We now offer a 'collect in store' option, which allows you to pay for goods online and collect from our Bristol store at time that suits you (within our opening hours).

The process is simple:

  1. place your order and pay online, select 'Pick Up' at checkout;
  2. receive an email confirming that the order is ready for collection;
  3. bring/show your confirmation email and photo ID to collect your order.


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