Autoflower retake

So basically i'll answer like this , if your feeding and its PH corrected water your feeding it then the rain comes and rains a whole bunch it will mess up the PH in the ground changing the PH of what you put and it will simulate the effects as being watered at an inconsistent PH which will lead to lock outs and stunts of growth . How ever if your just feeding it rain water that you have collected in a bucket or reservoir then if it rains for a few days its no big deal because its getting the same water , with the same PH . If you are using rain water to give to your plants then measure its PH first so that when you feed with the nutrients you can correct the PH and have it always be consistent . Thats the most important thing when they are young like that is consistent PH and of course not have her be over watered . So if it rains like crazy for a few days I would move her somewhere were shes not going to get over watered and drown to death , when they are young like that less is more and rain for couple days straight onto a small plant like that not exactly the most ideal. I hope this information shed's some light onto your grow and helps you determine what you think is best for your young plants ! -Happy Growing!

Hey man, you can surely find organic cal mag especially in powder/dry form. If not you've got a bunch of options starting with diatomous earth (it's got micro in it and cool pestcontrol properties !) or crushed egg shells for the calcium. You're so close to harvest so what I would actually do is to use some chelation agents that will help get the micro needed to the plants. You can find bio enzymes or if you want something stronger you can find bio humic and fluvic acid. you can find the acids in the biocanna line, that's all their "boost" is actually. Other bio brands are much the same so look at the ingredients in the flower boosters. Just my best advice brother ! Hope it helps ! 🚀