biopreparados.es

Soluble calcium phosphate (WCaP)

Soluble calcium phosphate (WCaP)

A solution of bioavailable phosphorus and calcium obtained from calcined bones and vinegar

Mineral and nutritional supplements Extract

Extract

Highly concentrated extraction of the plant material in a solvent (water, alcohol or oil), using a much higher plant-to-solvent ratio than a simple maceration, and often a longer contact time. The result is a very concentrated liquid, meant to keep for a long time and always be used diluted, unlike the other techniques prepared for more immediate use.

Process summary

1) Finely chop or crush the plant material, using a high proportion relative to the solvent (more plant matter than in a standard maceration). 2) Fully cover with the chosen solvent (water, alcohol or oil) in a closed container, opaque or kept in the dark. 3) Let it sit for several weeks, shaking occasionally. 4) Strain, bottle in a sealed container and store cool and dark — always use diluted, never undiluted.

See all preparation methods

✅ Authorised (some countries)

It provides phosphorus and calcium in a soluble form that is easily absorbed by leaves and roots. It promotes root development, improves flowering and fruit set, and contributes to the strength of plant tissues.

Application

When to use: Routinely and occasionally

Development stage: Rooting Growth Flowering

Application description: Dilute the calcium phosphate extract in water and apply it as a targeted irrigation to the root zone during transplanting and rooting, or spray it on the foliage during flowering and fruiting to enhance the absorption of phosphorus and calcium.

Dose: 1–2 L of extract diluted in 20 L of water

Full recipe reserved for members

This recipe is freely viewable for its summary, but the full ingredients, dosage and application method are reserved for members. Create a free account or sign in to see the complete recipe.

Create a free account Log in

Content hidden: this page is protected. Close developer tools to keep viewing it.

Regulatory status

✅ Authorised in Burundi, in India, in Kenya, in South Korea, in the Philippines, in Rwanda, in Tanzania and in Uganda

Authorised bio-preparations: Burundi
Authorised bio-preparations: India
Authorised bio-preparations: Kenya
Authorised bio-preparations: South Korea
Authorised bio-preparations: Philippines
Authorised bio-preparations: Rwanda
Authorised bio-preparations: Tanzania
Authorised bio-preparations: Uganda

Calcium phosphate extract obtained from bones preserved in vinegar for use as a fertilizer. Its production on the farm does not require European authorization (Regulation 2019/1009 only regulates marketing), but bones are animal by-products subject to Regulation (EC) 1069/2009. In organic farming, Annex II of Regulation 2021/1165 permits bone meal among products of animal origin, subject to certain conditions. Its ingredients also appear on the official lists of inputs permitted in organic farming of: Burundi, India, Kenya, South Korea, Philippines, Rwanda, Tanzania, Uganda. Depending on the country, some are only allowed under conditions (certification body approval, maximum doses): see each country's page.

Official texts

Official sources automatically checked on 20/10/2026.

What the icons mean: ✅ Authorised ⚠️ Tolerated 🟠 Not prohibited ⛔ Not authorised EU 🔎 Status being verified Full details →

Documentary information, checked on 19/10/2026. Not a substitute for legal advice; regulations may vary from country to country. See the regulations · Substances authorised in Europe

Related recipes

Mineral and nutritional supplements

Water-soluble calcium (WCA)

✅ Authorised (some countries)
Mineral and nutritional supplements

Mineral salts for livestock

⛔ Not authorised EU
Mineral and nutritional supplements

Multinutritional block for livestock

⚠️ Tolerated
Biostimulants

Fermented Fruit Juice (FFJ)

🟠 Not prohibited
Plant vitality

Oriental Herbal Nutrient (OHN)

✅ Authorised (some countries)
Weed management

Vinegar for weed management

✅ Authorised EU