Calmag en cultivo orgánico

Filtered water does have a smaller EC reading. EC doesn't mean much in organic grows but it still means the water has no minerals if EC = 0. Some nutrient brands advise to add lesser Calmag when using tap water and more when using RO water. That might mean you should add some Calmag. Exbeginner list of organic sources of Calmag is on point. Good luck

Plagron soil, fertile or both? The soil composition sounds good but when listing actual ingredients it just says "organic fertilizer", sketchy as. Fertilizers that are high in calcium include shells (egg, clam, or oyster), lime, gypsum, wood ash, bone meal, and calcium nitrate. Even add some dolomite lime as a soil ammendment, just be careful of ph levels.