Fox Farm Grow Big Soil – Liquid Vegetative Growth Nutrient Fertiliser

Grow Big Soil by Fox Farm is a 100% organic, fast-acting liquid nutrient designed for soil-grown plants in the vegetative stage. Formulated with earthworm castings and Norwegian kelp, it delivers a balanced NPK alongside a broad range of micronutrients and trace minerals — supporting sturdy stems, healthy foliage, and strong structural development.

NPK 6-4-4

A well-balanced vegetative formula with enough nitrogen to drive vigorous leafy growth, supported by phosphorus and potassium for strong root and stem development. Earthworm castings and Norwegian kelp contribute natural micronutrients and growth compounds to the feed.

Foliar Application

Grow Big Soil can also be applied as a foliar spray — apply to both sides of leaves for direct nutrient uptake during the vegetative stage.

Breathable Lid Notice

Fox Farm uses breathable lids on all liquid products. There is no inner seal — a small hole in the bottle cap allows live microbes to breathe. This is intentional and does not affect product quality.