For 20 cups (makes approximately 500 mini ¾” blocks or 36 of the 2” blocks)
16 cups sifted peat moss or coco fiber
4 cups sifted compost
¼ cup greensand
¼ cup rock phosphate powder
Mix ingredients dry. Mix 3 parts dry mixture to 1 part water.
Larger Volumes
4 gallons sifted peat moss or coco fiber
1 gallon sifted compost
1 cup greensand
1 cup rock phosphate powder
Mix ingredients dry. Mix 3 parts dry mixture to 1 part water.
Mixing tub suggestions: kitty litter box, cement mixing tray, wheelbarrow or a rigid baby pool.
Best tool for mixing: use an old-fashioned potato masher to mix water with dry mix.
Storage of unused blocking mix: allow the unused portion of blocking mix to dry out and store in a breathable manner. It can be re-wet and used next time.
About the nutrients: In the event you cannot locate the nutrient ingredients perhaps you can find a substitute that is similar.
- Greensand is used for its broad spectrum source of micronutrients as well as potassium. It contains about 3% total potash, along with iron, magnesium, silica and as many as 30 other trace minerals.
- Rock phosphate is a non-detrital sedimentary rock that contains high amounts of phosphate bearing minerals.
Click here for a printable version of the Blocking Mix Recipe.