Blossom Blaster

Out of stock

BLOWOUT SALE! Blooming & Fruiting Formula. Grotek Blossom Blaster (0-39-25) is a powerful fertilizer designed to increase the number and size of blooms. It contains a very high concentration of phosphorus and potassium which contribute to proper plant maturation, fruit quality and the formation of sugars, starches and oils.

This powerful flowering supplement should be added twice during the initial 3 weeks of flowering. It is effective in all growing mediums and is compatible with all base nutrients.

Available size: 300 Gram Tub

Complete Feeding Chart (PDF)
Grotek Bloom Feeding Chart (PDF)


Hydroponics: For every 10 L (2.5 gal) of growing solution in your reservoir, mix in 1 g (1/4 tsp). Add directly to your reservoir when flower buds appear established. Mix well and repeat once more two weeks later.

Soil/ Soilless: For every 10 L (2.5 gal) of water, mix in 1 g (1/4 tsp). Dissolve directly into your watering jug. Water with 1/2 L (1/2 qt) per plant when the first flowers appear. Repeat once more two weeks later.

Do not use as a foliar spray. Always use fresh product. Do not add to existing solutions.