Dirtbag
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If youre tap water is 120ppm i wouldnt use calmag. As for feeding in week 4 flower it depends how the plant is feeding and how it looks, some plants like more and some less and i always strive to intentionally underfeed by a hair, so there is no hard and fast rule about when to start dialing the food back. But for me i guess the general ques i look for are when the buds really slow down on new calyx growth and stop pumping out white hairs before they swell, and ill keep an eye on runoff ppm and try to use that a a guide too.Hi Dirtbag:
Thank you for your previous instruction, and you used to say that u will drop EC back to 0.8-1ec after the stretch for weeks 4-8 ,But if its sativa main hybrids (around 10-12 weeks of flowering), Do i still need to cut it to 0.8-1.0 EC in the fourth week or so?
In addition, I recently found that the calmag can be stopped around the second week of flowering. I think if my tap water (about 120 ppm), I may not need any calmag, and i really don't know what to do .