Emerald Harvest - Cal-Mag

How Cal-Mag Works

Cal-Mag delivers a rich source of calcium and magnesium, two secondary macronutrients that are essential for plant health and vitality. If plants don't get an adequate supply of calcium and magnesium, then you'll start to notice some very negative consequences. Growth can slow down to a crawl and you'll see clear signs of deficiencies, like yellowing between the veins on leaves (magnesium) and dark brown spots (calcium), as well as an overall paleness.

Cal-Mag is particularly useful for growers who live in soft water areas. Soft water has lower levels of dissolved minerals, resulting in lower starting EC levels. The dissolved minerals in tap water tend to be made up of a large proportion of calcium and magnesium, which makes it all the more important for those in soft water areas to supplement with Cal-Mag.

But it's not just those in soft water areas who need to pay attention. High levels of potassium can lock out calcium and magnesium. Potassium is needed in larger amounts during the bloom phase, which is great for flowers and fruits, but it can also trigger deficiencies if you don't keep an eye on it. This is also worth noting for those running coco coir - one of the UK's most popular mediums. Coco naturally releases excess potassium as it degrades, which can trigger issues with nutrient lockout. Cal-Mag is exactly what you need to keep you growing sweetly.