Hesi's most powerful bloom booster – for explosive flower development, harder cell structure & more yield

Hesi PK 13/14 is a highly concentrated PK booster specifically developed to provide maximum support to plants in the mid to late flowering phase.
The perfect ratio of phosphorus (P) and potassium (K) promotes cell division, flower formation, and structural hardening – making flowers larger, denser, heavier, and more aromatic.

Ideal for:
✔ Soil
✔ Coco
✔ Hydro / RDWC / DWC
✔ Rockwool & Aeroponics
✔ Indoor & Outdoor

✅ Benefits at a glance

✔ Ensures dense, heavy, compact flowers
✔ Significantly increases final weight & flower volume
✔ Perfectly balanced PK ratio (13/14)
✔ Supports cell development & flower hardening
✔ Acts immediately – ideal complement to any bloom fertilizer
✔ Suitable for all media: Soil, Coco, Hydro, Aero
✔ Easy to use – especially in weeks 4–6 of flowering
✔ Ideal for hobby and pro growers

💡 Why PK 13/14 works

🌸 Phosphorus (P) → promotes cell division & flower formation
💪 Potassium (K) → strengthens cell structure, resin production & stability
🌿 Synergy effect → Plants can perfectly convert bloom energy

The result:
✔ Higher final weight
✔ More density
✔ Better aroma
✔ Harder structure
✔ Fewer "airy" flowers

⚙️ Technical Data

🛠️ Application & Dosage

Standard:

• 1.5 ml per liter of water

• Use from flowering week 4 to week 6

Hydro / RDWC / DWC:

• 1–1.5 ml per liter directly into the reservoir

• Replenish regularly with high consumption

Notes:
⚠️ Do not overdose simultaneously with very strong boosters
⚠️ Always monitor pH/EC – PK increases the EC value
⚠️ Never apply in early flowering

💡 Pro-Tip:
In combination with Hesi Boost, extremely aromatic and compact flowers are produced.