Calcium Nitrate Supplement for Mushroom Substrates

Calcium nitrate adds two things mushrooms love: bio‑available calcium for stronger cell walls and nitrate nitrogen for fast, healthy mycelium. A little goes a long way, so this 100 g pack is enough to treat dozens of tubs or bags.

Why Choose Calcium Nitrate?

• Dual nutrient boost: calcium + nitrate nitrogen in one soluble salt.
• Dissolves instantly in water for even distribution through coir, straw or sawdust‑based mixes.
• Neutral to slightly alkaline, helping keep substrate pH in the sweet spot around 6.5.
• Compatible with pasteurised or fully sterilised recipes.

Recommended Usage Rate

Add 0.3 to 0.5 percent of the dry substrate weight. That equals 3 to 5 g per kilogram of dry substrate (about half to one level teaspoon).

Quick reference examples

How to Use

1. Dissolve the measured calcium nitrate in part of your hydration water.
2. Mix thoroughly into the substrate so no dry spots remain.
3. Proceed with pasteurisation or sterilisation as usual.

Tips

• Start at the lower end of the range if you have not supplemented before.
• Avoid exceeding 1 percent; higher levels can slow colonisation or invite bacteria.
• Store sealed and labelled in a dry place; the crystals absorb moisture rapidly.

Pack Size

100g resealable pouch of horticultural‑grade calcium nitrate (tetrahydrate).

Legal Disclaimer

Use this supplement solely for cultivating legal mushroom species. Keep out of reach of children, pets and uninformed adults.

Payment: We accept Bank Transfer only for this product. Orders paid by cash in post, cryptocurrency or other anonymous methods will be refused and refunded.

Safety notice: Calcium nitrate is acidic and a strong oxidiser. Store sealed in a cool, dry place, away from heat sources, organic materials and other chemicals. Wear gloves, eye protection and a respirator when handling. Avoid skin or eye contact, inhalation and ingestion. Not for human consumption.