Fox Farm Bush Doctor SledgeHammer
Fox Farm Bush Doctor SledgeHammer
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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
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Clear salt build-up before it locks nutrients out
Bush Doctor SledgeHammer is a nutrient rinse formula designed to encourage water movement through soil and soilless media. Heavy fertiliser use compromises plant growth over time as mineral salts concentrate in the root zone, eventually restricting how well roots can take up water and nutrients even when feed levels are correct.
SledgeHammer is derived from saponins extracted from the Yucca schidigera plant, which is what makes it OMRI Listed and a registered CDFA organic input material — it can be used in organic growing as well as conventional hydroponic and soil setups. It is worked into a weekly feeding schedule at a low rate in hydro systems, run through the system with every reservoir change, and used for a dedicated flush every two weeks to relieve nutrient lockout before it becomes a visible problem.
- Yucca-derived saponins that encourage water movement through media
- OMRI Listed and CDFA registered organic input material
- Helps relieve nutrient lockout caused by mineral salt build-up
- Works as a weekly additive or a dedicated flush depending on need
- Suitable for both hydroponic and soil applications
Technical Specifications
- Derived from Yucca schidigera saponins
- Certification: OMRI Listed, Registered CDFA Organic Input Material
- Container/in-ground dose: 10ml per 4L fresh water, drench thoroughly, every 3-4 weeks to harvest
- Hydroponic weekly dose: 2 drops per 4L fresh reservoir water, combined with weekly feed
- Flush dose: 2.5ml per 4L fresh reservoir water, full system flush every two weeks, cycle one hour and change reservoir
| Application | Per 1 L | Per 10 L |
|---|---|---|
| Containers and in-ground — drench thoroughly, every 3 to 4 weeks to harvest | 2.5 ml | 25 ml |
| Hydroponic full-system flush — every two weeks | 0.63 ml | 6.3 ml |

FREE Express Delivery on orders over £60. We aim to post same day for next-working-day arrival — order by 3pm Mon–Fri. Delivery is 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.