Structure — Water-Soluble Calcium Phosphate

What is Structure?

Structure is water-soluble calcium phosphate made by dissolving calcined bones in natural vinegar. The acid dissolves the calcium and phosphorus from the bone, creating a bioavailable mineral solution that plants can absorb directly.

What does it do?

Structure builds the physical architecture of the plant — thicker cell walls, stronger stems, deeper root development. Plants with adequate calcium are firmer, more upright, and more resistant to pests and disease. Many problems that appear biological are actually structural: a calcium-deficient plant is simply more vulnerable.

How is it made?

Burn bones until white and fully calcined. Cool, then submerge in natural vinegar at a 1:3 ratio. The acid dissolves the calcium phosphate over 7–14 days. Strain and store. Use at 1:1000.

When to use it

Primarily during childhood and puberty (the first two thirds of the plant's life cycle), when structure is being built. Reduce during late fruiting. Also valuable at transplant to encourage root establishment.