Plant Success King Crab Beneficial Root Inoculant
Plant Success King Crab Beneficial Root Inoculant
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Order by 3pm Mon–Thu for next-working-day delivery · FREE delivery over £50 · Free Wembley pickup
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Wake the Root Zone Up and Let It Feed the Plant
A microbial inoculant that puts life back into the root zone, developed in the USA by Plant Success. King Crab carries 275 million organisms per ml and works in soil, coco and hydroponics, including on plants that are already well established. The dilution rate is extremely low at 1/2ml to 1 gallon of water, so a little goes a very long way, and it drops into any existing nutrient line without upsetting your feed schedule.
Key Benefits
- 275 million organisms per ml colonising the root zone from the first feed
- Increases nutrient uptake, so the feed already in your tank works harder
- Bigger yields off the same room, same lights and same nutrient spend
- Soil, coco and hydro compatible, plus safe on established plants mid-cycle
- Very low dilution at 1/2ml per gallon, which makes it genuinely cost effective
- Works alongside any nutrient line, no need to change your base feed
Weak Roots and Stalled Growth in the First Fortnight
A sterile root zone is slow going. Freshly potted plants sit through transplant shock, roots take their time reaching the edges of the pot, and the result is slow growth and poor nutrient uptake no matter how good the feed is. Inoculating with King Crab colonises the rhizosphere early, so roots extend faster, take up more of what you are giving them and drive harder top growth into flower rather than idling.
How to Use
- Shake well before every use so the organisms are evenly suspended
- Small mixes: 1/2ml per 1 gallon of water
- Medium reservoirs: 1ml per 10 gallons of water
- Large reservoirs: 5ml per 50 gallons of water
- Frequency: apply once a week for optimal results
- Compatibility: use alongside your existing base nutrients and additives
Technical Specifications
- Brand: Plant Success
- Product type: Beneficial microbial root inoculant
- Organism count: 275 million organisms per ml
- Dilution rate: 1/2ml per 1 gallon, 1ml per 10 gallons, 5ml per 50 gallons
- Frequency: Once per week
- Compatible media: Soil, coco and hydroponics
- Compatibility: Any nutrient line, including established plants
- Origin: Developed in the USA by Plant Success

Free next-day delivery on orders over £50 (order by 3pm Mon–Thu). 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.