Skip to product information
1 of 1
Advanced Nutrients

Advanced Nutrients Hammerhead PK Late Flowering Booster

Advanced Nutrients Hammerhead PK Late Flowering Booster

Regular price £6.99 GBP
Regular price Sale price £6.99 GBP
Sale Sold out
Taxes included. Shipping calculated at checkout.

In stock

Size

Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup

View full details

Description

A straight PK for the second half of flower

Hammerhead is Advanced Nutrients' phosphorus and potassium booster for the back half of flowering. It is a straightforward PK rather than a blended additive, which makes it easy to slot into any feed schedule without duplicating what a base feed already provides.

Key Benefits

  • Straight PK, no passengers - you are paying for phosphorus and potassium and nothing else
  • Second half of flower - the window where a PK earns its place
  • Low cost per litre - among the cheapest ways to add a real PK
  • Any base feed - mineral or organic
  • Easy to dial in - one variable rather than a blend of several

Flowers that stop gaining in the last three weeks

A base feed carries a general ratio, and in the second half of flower demand for phosphorus and potassium climbs well past it. The plant plateaus, and the difference between a good yield and an average one is usually decided right there.

How to Use

  • Weeks 4 to 6 of flower: 2 ml per litre at every feed
  • Heavy feeders: up to 3 ml per litre if leaf colour holds
  • Taper: stop about a week before harvest and flush
  • EC: reduce the base feed as the PK goes up so total EC stays on target
  • Watch for: dark, clawed leaf tips mean too much - back it off

Technical Specifications

  • Role: Late flowering PK booster
  • Window: Weeks 4 to 6 of flower
  • Typical dose: 2 to 3 ml per litre
  • Formulation: Straight phosphorus and potassium
  • Media: Soil, coco, hydroponics
Feed Chart
Advanced Nutrients Hammerhead · soil, coco and hydroponics
Stage Per 1 L Per 10 L
Flowering weeks 4 to 6 2 ml 20 ml
Heavy feeders, if leaf colour holds 3 ml 30 ml
Note — Stop about a week before harvest and flush. Reduce the base feed as the PK goes up so total EC stays on target; dark, clawed leaf tips mean too much. Check pH and EC after mixing.

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.