Concentrated PK Bloom Booster – Intense Nutrients PK Ultra

PK Ultra – Pro Series Concentrated PK Booster for the Final Push

There's a counter-intuitive truth in premium products: the most concentrated ones are often the best value. A 250ml bottle of Intense Nutrients PK Ultra looks small on the shelf, until you notice the dose is just 0.2–0.3ml per litre. That one bottle treats over 800 litres of water. Part of Intense's top-tier Pro Series, PK Ultra is a high-efficiency phosphorus and potassium booster engineered for the late stage of flowering and fruiting, when size, weight and aroma are decided.

It's designed to increase flower and fruit density, support aromatic compound (terpene) production for richer scent and flavour, and drive bigger, more abundant harvests.

Perfect For

Serious tomato and chilli growers chasing show-bench fruit, aromatic herbs, strawberries, citrus and fig trees, cut-flower growers, and anyone growing in soil, coco or hydro who wants professional-grade results from a beautifully concentrated bottle.

Key Benefits

• Highly concentrated: 0.2–0.3ml per litre
• Boosts flower and fruit size, weight and density late in the cycle
• Supports terpene production for richer aroma and flavour
• Works with any base nutrient in any growing medium

How to Use

Add 0.2–0.3ml per litre of water or nutrient solution from week 4 of flowering to the end of week 7, as shown in the schedule below. Use a syringe for accurate dosing.

Feeding Schedule

From the official Intense Nutrients Ultra (Pro Series) soil grow schedule, in ml per litre of water:

🌿 Rose's Pro-Tip: with a product this concentrated, measure don't guess. A few tenths of a millilitre is just a few drops, and more is not better. Precision is the whole point of the Pro Series.

Sizes

250ml, 1 Litre and 5 Litres.

Black Flag Horticulture Ltd, Coventry – proud UK stockists of Intense Nutrients.