Emerald Harvest Cal-Mag Calcium Magnesium Supplement

Cover the Two Secondary Macros Your Base Feed Runs Short On

Emerald Harvest Cal-Mag, from California, supplies calcium and magnesium - two secondary macronutrients that do far more work than the name suggests. Calcium holds cell walls together; magnesium sits at the centre of the chlorophyll molecule. Between them they assist the transport of other nutrients and increase photosynthesis rates, which is why a shortfall stalls growth even when your base feed EC looks right. Essential stuff in coco, under strong LEDs, and on RO or soft tap water.

Key Benefits

• Maintains optimal growth rates - keeps plants moving rather than plateauing mid-cycle
• Assists nutrient transport - calcium moves other elements through the plant properly
• Increases photosynthesis rates - magnesium underpins chlorophyll production
• Gets the best from your boosters - supports peak flower additives so they actually deliver
• Ideal for RO and soft water - replaces what filtration and low-mineral supplies leave out

Pale New Growth and Feeds That Stop Working

Calcium and magnesium shortages are easy to misread. Poor nutrient uptake, interveinal yellowing on older leaves, weak roots and slow growth all get blamed on the base feed, when the plant is short of the elements that move everything else around. It bites hardest in coco and on RO water, where demand is high and supply is near zero.

How to Use

• Coco: the highest-demand medium - run Cal-Mag with your feed from early veg through flower
• Hydroponics and DWC: add to the reservoir first, mix thoroughly, then add your base A and B
• Soil: use as required, usually only on RO water or if new growth shows deficiency
• Rate: follow the Emerald Harvest feed chart for your stage - start low and adjust by watching new growth and EC
• pH: set after mixing - 5.5-6.0 in hydro and coco, 6.0-6.5 in soil
• Never mix concentrated Cal-Mag straight into silica - dilute in the tank between additions