Green Planet Massive Bloom Bulking Additive
Green Planet Massive Bloom Bulking Additive
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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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The bulking additive Green Planet built its name on
Green Planet Massive is a mid-flower bulking additive combining phosphorus and potassium with amino acids, vitamins and seaweed extract. It is dosed through the weeks when flowers are sizing rather than at the finish, and it is the product most growers reach for first in the Green Planet range.
Key Benefits
- Built for the sizing weeks - phosphorus and potassium arriving while flowers are still building mass
- More than a PK - amino acids and vitamins support the transport of sugars, not just the mineral supply
- Seaweed extract included - natural hormones that keep the plant working under a heavy load
- Works with any base feed - not restricted to the GP3 programme
- Firms loose flowers - the standard answer to bulk without density
Flowers with volume but no weight
Flowers that look large and weigh nothing have usually run short of phosphorus and potassium during the sizing weeks, or received a PK so late there was nothing left to build with. Airy buds and low yields are decided in the middle of flower, not at the end.
How to Use
- Hydroponics, from week 2 of bloom: 5 ml per litre added to any base programme
- Soil: 10 ml per litre once a week as flowers form, roughly 10 litres per plant - GreenPlanet's soil rate is deliberately double the hydroponic one
- Taper: stop about a fortnight before harvest and move to a ripening feed
- EC: reduce the base feed slightly as Massive goes up so total EC stays on target
- Media: soil, coco and hydroponics
Technical Specifications
- Role: Mid-flower bulking additive
- Key inputs: Phosphorus, potassium, amino acids, vitamins, seaweed
- Typical dose: 5 ml per litre hydroponic, 10 ml per litre soil
- Window: From week 2 of bloom until two weeks before harvest
- Media: Soil, coco, hydroponics
| Medium and stage | Per 1 L | Per 10 L |
|---|---|---|
| Hydroponic — from week 2 of bloom, with any base programme | 5 ml | 50 ml |
| Soil — once a week as flowers form, about 10 L per plant, until two weeks before harvest | 10 ml | 100 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.