INTENSE PK Phite Phosphite Flowering Additive
INTENSE PK Phite is a phosphite-based flowering additive designed to support nutrient uptake during bloom and help maintain a healthy crop through the later flowering stage. Available in 1L, 5L and 10L options, it is suited to growers looking for a practical PK supplement with added phosphite mobility.
- ✔ Phosphite flowering additive formulated for bloom-phase feeding
- ✔ Designed to be more easily absorbed and mobile within the plant
- ✔ Supports flowering development alongside your main nutrient programme
- ✔ Contains Potassium Oxide 10.0% and Phosphite 16.4%
- ✔ Use at 1-2ml per litre from the end of week three of flowering
- ✔ Available size options: 1L, 5L and 10L
Price range: £12.95 through £43.99 incl. Vat
🌱 INTENSE PK Phite Phosphite Flowering Additive — Guide and Product Information
Overview
INTENSE PK Phite is a flowering additive developed for use during the bloom phase, using phosphite rather than standard phosphate-based PK supplementation. According to the manufacturer, this allows the formula to be more easily absorbed and more mobile within the plant, making it a practical choice for growers refining their flowering feed schedule.
As part of the Nutrients and Boosters range at Acorn Horticulture, PK Phite is intended to complement a base nutrient programme rather than replace it.
🌿 Why use INTENSE PK Phite during flowering?
During flowering, plants typically need careful PK support to help drive bloom development. INTENSE PK Phite is formulated specifically for this stage and is used from the end of week three in flowering. Its phosphite-based composition is designed for efficient movement within the plant, helping growers introduce targeted bloom support when demand increases.
The product description also states that INTENSE PK Phite has anti-fungal properties and may help guard against issues such as powdery mildew, leafspot fungus and botrytis as part of a well-managed growing environment. Good airflow and environmental control remain important, and for more advice you can read our guide to preventing mould and mildew in your grow tent.
📦 Available Options and Sizes
INTENSE PK Phite is a variable product with the following size options:
- ✔ 1L
- ✔ 5L
- ✔ 10L
The smaller option can suit personal grow spaces and trial runs, while larger sizes may be more convenient for regular feeding schedules or larger garden setups.
🌼 Suitable applications
INTENSE PK Phite is suitable for flowering-stage feeding where a grower wants to add a dedicated PK supplement to an established nutrient regime. It can be used in hydroponic and general horticultural feeding programmes where liquid nutrient additives are measured per litre of water.
If you are building a wider bloom feeding plan, related products in our range include PLAGRON Terra Bloom Flowering Nutrient, PLAGRON Power Buds 5L and PLAGRON PUREZYM Enzyme Additive for Root Zone.
🔧 Technical Specifications
- ✔ Product: INTENSE PK Phite
- ✔ Product type: Variable liquid flowering additive
- ✔ Category: Nutrients and Boosters
- ✔ Use: Bloom-phase PK supplementation
- ✔ Application rate: 1-2ml per litre
- ✔ Recommended timing: Use from end of week three in flowering period
- ✔ Potassium Oxide: 10.0%
- ✔ Phosphite: 16.4%
- ✔ Available sizes: 1L, 5L, 10L
🎯 Ideal Uses
- ✔ Adding PK support from mid flowering onwards
- ✔ Supporting bloom feeding programmes with a phosphite-based additive
- ✔ Growers looking for a dedicated flowering booster to use alongside base nutrients
- ✔ Feeding schedules where measured ml-per-litre dosing is preferred
🧪 Setup and Usage Tips
Use INTENSE PK Phite at 1-2ml per litre of water from the end of week three in the flowering period. Start at the lower rate if you are introducing it into a new feeding schedule, then adjust carefully within the recommended range according to plant response and the rest of your nutrient programme.
Always measure accurately, mix thoroughly and avoid overcomplicating your feed chart with too many overlapping bloom additives. Environmental control also plays a major role in flower quality, so for further reading you may find our article on boosting plant nutrition with advanced grow kit techniques useful.
🔗 Related products and growing advice
Browse more products in our Nutrients and Boosters category if you are building a complete feed programme. You may also want to pair flowering additives with products such as PLAGRON Power Roots Root Stimulator earlier in the cycle, or add bloom support options such as PLAGRON Sugar Royal 5L where suitable for your setup.
❓ FAQ
What is INTENSE PK Phite used for?
INTENSE PK Phite is used as a flowering additive during the bloom stage to provide PK support as part of a wider nutrient programme.
What sizes are available?
This variable product is available in 1L, 5L and 10L sizes.
When should I start using PK Phite?
The stated directions are to use it from the end of week three in the flowering period.
How much should I use per litre?
The recommended application rate is 1-2ml per litre.
Can I use this on its own as a complete feed?
It is best treated as an additive to support a main feeding programme rather than a standalone base nutrient.
What makes this formula different?
The product is formulated using phosphite, which the manufacturer states is more easily absorbed and more mobile within the plant than standard forms used in other PK additives.

