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Rootfast by Atami is a powerful 100% plant-based root stimulator for Cannabis plants.

With Rootfast, the root mass develops abundantly, preparing the plant for vigorous and robust growth.

Recommended for Cannabis cultivators who want to grow their plants naturally and organically, and for vegan growers.


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Type and Use

Organic root stimulant of plant origin, designed for use on plants that have already rooted during the first few weeks of growth, in substrates of soil, coco, and non-recirculating hydroponics.

Benefits to the Plant

Laminaria Digitata is a brown seaweed rich in phosphates, amino acids, and phytohormones.

  • Boosts the formation of root hair which is the part of the root where nutrients are absorbed.
  • Increases root mass, leading to larger plants with greater strength.  
  • Helps combat stress, allowing plants to recover faster and to continue growing.

Usage and Dosage

Mix 1ml of Rootfast per litre of water. Use during the first two weeks of growth and after transplants.


P phosphorus 5% W/W

Derivatives of Laminaria Digitata and ammonium phosphate.

La Huerta’s Opinion

This product is a root stimulant, for optimal results it should be combined with a complete growth fertilizer. Within the Ata product line from B’Cuzz, we recommend using Ata Coco Max for coco substrate, Ata Awa Leaves A and B for hydroponic systems and Ata Terra Leaves for soil substrate.

Data sheet

Type of composition
Bio or organic
Growth stage
Type of stimulant or additive
Root stimulant
Type of grow
Aeroponic grow
Coco grow
Hydroponic grow
Soil grow

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