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Canned_ibis started grow question 4 years ago
Calmag, how much to use and when?? Have spoken to some people and they say every feed and others say, when the plant needs it. What am I looking for as a deficiency of calmag?? And I start using less the further into flower I go??
Week 1
Techniques. Defoliation
PharmaZ answered grow question 4 years ago
Hey there. I’ve written a reply 3 times now and it didn’t send. Basically to shorten it down. If your tap water is around 0.4EC before adding nutrients as long as the nutes you use and the soil is of good quality you may never need it. If you live in soft area like me (0.1EC) you need it. Only in small amounts in soil, but every feed with coco. —————————
Deficiency signs can show weeks after the requirment for either Ca or Mg. So this is why growers always supplement Calmag, unbeknown to most that when a deficiency shows up it was because the plat didn’t have enough/access to calcium or magnesium. So the moral of the story is always use it but find out how much you need. You need at least 160ppm of calcium every feed in veg and flowering stretch, 2% of that total calcium should be added as magnesium so 30-40ppm of mag is enough. Hope that clears things up:v::skin-tone-2:
B4RNS answered grow question 4 years ago
Use cal mag every feed when using RO water .... otherwise there’s plenty enough in your tap water ! You switch from cal mag to mag sulfur around week 4 of flowering .
Michka answered grow question 4 years ago
If no deficiency, you can give just a little when temperatures are rising.. If there's a deficiency then give a big tea spoon for two liters of water, for a week or two.. I hope i helped you !