Yellowing

Week 2 to 3 not doing great won't grow seems to be yellowing growing in coco coir and perlite other 2 are doing great just got gai greens 4-4-4 should I add and how much

Need much more info, otherwise we’ll have use our crystal balls! What nutes, how often and much are you watering, ph of nute solution, what kind (wattage/brand) of light, how close to plant?

that's not good. gaia 444 is not what you want. you need to learn about the medium you're using.

coco for cannabis

sbeau2030 said:

Week 2 to 3 not doing great won't grow seems to be yellowing growing in coco coir and perlite other 2 are doing great just got gai greens 4-4-4 should I add and how much

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I have no experience using the Gia green food but I have plenty using coco. If you grab a small bottle of flora nova bloom and feed every watering to 10-20% runoff with a PH of 5.8-6.2 and only feed like 400ppm at that stage maybe 500 but I would try to keep it light you should have good results. That’s all you will need unless you are using RO water then maybe add some cal/mag but only 1/2-1ml per gal.
I have grown coco for few years now and Flora nova bloom from start to finish works great. That gia green I think takes time to break down to be available to the plants. There is too many Utubers showing them using coco and gia with in-real results and lots of good growers here say they are bogus. I can only tell you what works for me best of luck