Available sizes:

500ml, 1L, 4L, 10L, 23L



What is Cal-Max™

Fast Acting Calcium. During periods of rapid growth calcium can be a limiting factor. The calcium in this formula is rapidly available and fast acting to help plants achieve the best yields.

Key nutrients and chelates assist plants. Beyond calcium this formula offers nitrogen, and a strong source of chelated Iron for a rich greening effect on plants. Improving overall structure and growth rates this formula is a very beneficial supplement to a standard feeding program.

Excellent for conditioning coir. As a source of both nitrogen and calcium this formula is a great choice for coir charging the media with necessary nutrients throughout the growing cycle.


SHAKE WELL before using.

Soil/Soilless: Mix 1 tsp per 1 gal of water (5 ml / 4 L). Use as required.

Water Culture: Mix 1−1½ tsp per 1 gal of water (5−8 ml / 4 L). Use as required.

Foliar: Mix 2 tsp of Cal-MaxTM per 1 gal of water (5 ml / 2 L). Use as required.

Cal-MaxTM Feed Chart

Soil / Soilless :2 ml / 4 L (¼-½ tsp / gal)
Hydroponics / Water Culture:5 ml / 4 L (1 tsp / gal)
Foliar:2.5 ml / 4 L (½ tsp / gal)