Alga Bloom

Alga Bloom by Plagron is an organic, seaweed-based base nutrient designed specifically for the flowering phase in soil cultivation. Certified organic by Control Union, it delivers phosphorus and potassium from natural algae sources to support dense, healthy flower development.

The algae-derived nutrients promote robust flowering and help develop the amino acids, proteins, and trace elements needed for optimal terpene and resin production. The presence of alginates and organic compounds also improves soil structure and feeds the microbial ecosystem, contributing to better flavor and aroma in the final harvest.

Use at a maximum dose of 4 ml/L with every watering throughout the bloom phase. Not suitable for hydroponic systems — this is a soil-only nutrient. It's also not EC-measurable since the organic compounds don't conduct electricity. Alga Bloom pairs with Alga Grow for a complete organic two-product veg-to-bloom program, and works alongside Plagron's additive range (Power Roots, Silic Rock, Green Sensation) for growers who want to build out a fuller feed schedule.