Description
In stock now. Phosphorus and potassium at 14:15, for the hungriest weeks.
IONIC PK replenishes the phosphorus and potassium that hard-working crops strip fastest, lifting the K to N ratio exactly when flowering demands it. Fortified with iron for the energy demands of bloom, and highly concentrated at 14:15.
Use alongside any base feed through peak flowering.
Key features
- P and K at 14:15, highly concentrated
- Replenishes what heavy-feeding crops strip fastest
- Fortified with iron for bloom
- Use alongside any base feed
- Dilution / Dose
- 1ml/L, added on top of your base Bloom feed.
- When To Use
- Weeks 8–12, the heaviest-demand flowering weeks
- Substrate Fit
- Works alongside every IONIC Bloom formula — Soil Bloom, Hydro Bloom, Hard Water Bloom and Coco Bloom.
- Grower Notes
- Bring PK in from week 8 (once Tonic and Flower Boost are already established) and run it through week 12, alongside your base Bloom feed and Flower Boost.
Good practice
- Add products to the water one at a time, stirring between each. Never mix concentrates neat.
- Keep any stored solution covered — light in stored solution eventually means algae.
- Measure every dose — eyeballing is where most feed problems start.
The Ionic Range
IONIC is one system, twelve products — a dedicated Grow and Bloom feed for each growing medium, plus four boosters used across all of them. Here's the full range:
FAQs
When do I start PK?
From week 8 of flowering, once your base Bloom feed and Tonic are already established — see any Bloom product page for the full feeding notes.
Can I use PK with any medium?
Yes — the same PK schedule (weeks 8–12) applies whether you're running Soil Bloom, Hydro Bloom, Hard Water Bloom or Coco Bloom.
Is PK a replacement for my base Bloom feed?
No — it's a booster used on top of your base feed, not instead of it.
How much of this will your grow actually need?
Tell us your medium, pot size and plant count. The Feed Chart Calculator builds your week‑by‑week chart with target EC, works out every bottle for the whole run, and puts them straight in your basket.
