In StockPlant Magic Platinum PK 9/18
£71.96£79.95Save £7.99
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Description
Plant Magic Platinum PK 9/18 is a highly concentrated flowering/fruiting booster for use in any growing medium.
Unlike most PK boosters, it contains double the amount of potassium (18%) to phosphorous (9%) - boosting your flowers/fruits to their full potential, enabling fruits to develop dense structures whilst enhancing flavour and aroma.
Available in 500ml, 1l and 5l sizes.
Key facts
| Type | Concentrated PK booster for flowering and fruiting |
|---|---|
| Analysis | 9% phosphorus, 18% potassium: twice as much potassium as phosphorus, unlike most PK boosters |
| Growing medium | Any |
| Dose | 0.2 to 0.5 ml per litre, rising by 0.1 ml a week through bloom weeks 4 to 7 |
| Dose source | Plant Magic Ultimate schedules for Coco, Hydro and Soil |
| Sizes | 250 ml, 500 ml and 1 litre |
| Brand | Plant Magic |
| Category | PK Boosters |
How to use
Platinum PK 9/18 is the PK booster in Plant Magic's Ultimate schedule. It goes in at the same small doses whether you grow in coco, hydro or soil:
- Bloom week 4: 0.2 ml per litre
- Bloom week 5: 0.3 ml per litre
- Bloom week 6: 0.4 ml per litre
- Bloom week 7: 0.5 ml per litre
- Bloom week 8: none (the Ultimate schedule uses Flush Finish); week 9: plain water
Use it instead of Plant Magic PK 13/14, not alongside it: the Essential schedule uses PK 13/14, the Ultimate schedule swaps it for Platinum. Add it after the base feed and check the EC of the finished mix.
The whole schedule is in the Plant Magic feed chart. More boosters are in PK boosters.
Questions
How is Platinum PK 9/18 different from PK 13/14?
It has twice as much potassium as phosphorus (9% P, 18% K), where most PK boosters are close to equal. It is also far more concentrated: Plant Magic's Ultimate schedule uses 0.2 to 0.5 ml per litre.
Can I use it with Plant Magic PK 13/14?
No, use one or the other. PK 13/14 is in Plant Magic's Essential schedule and Platinum PK 9/18 replaces it in the Ultimate schedule.
When do I start it?
Bloom week 4 in Plant Magic's Ultimate schedule, at 0.2 ml per litre, rising to 0.5 ml per litre in week 7.
