Need help with rust color spots and curling.

Ok so these are about 3.5 weeks old and in some cheap six month feed soil.

One has been doing great and has grown quickly with good color, but today I noticed a leave with one side curling under. Then I noticed some lighter color dots on a couple leaves.



This is a different plant that doesn’t seem to tolerate the soil as well. The leaves were developing a lot of rust color splotches between the veins. Initially I was watering with tap water but when my tester came the ph was super high. I switched to good water and thought that solved the issue but it seems to have only slowed it down, albeit significantly.



The lower leave has it much worse you can only see part of it in the picture though.


Any thoughts on what to do? I have ffof now that I’ve been transplanting into when I pot up.

Also how much can under watering slow growth?

Top plant with no blemishes is PH. Bottom pic plant has lockout because of the PH. Just a guess. Know your PH at all times and EC/PPM. I don't even water my plants without testing the PH first.

Ok awesome that’s exactly what I thought about the lockout from reading the problem threads but wasn’t sure.

Ive been using filtered spring water with the right ph and under 100 ppm. Is there anything I need to do to fix lockout or will it resolve on its own? And I guess I need to alter the ph for the curling one maybe then.

You're probably going to need to add some calcium and magnesium. Cannabis uses almost as much calcium as NPK and poor soil isn't usually adequate.

Nice job going with FFOF. You mentioned you were using a CHEAP soil mixture. Don't do that, you want to give your girls an environment to thrive without having to juggle a bunch of feedings to compensate.

When you transplant to the FFOF, premoisten the FFOF soil completely to runoff as well as the current container. This will make your transplant so much easier as the soil wont fall apart during transplant. After doing this, you shouldn't have to water for probably a week at least. Wait until the new pot is light when you pick it up and then resume watering.

The best way to make sure you aren't overwatering is pick up your pot after watering it. Feel how heavy it is and remember that. Once the pot begins to feel pretty light when you pick it up, it's time to water again. Once you get used to this, it's very easy to NOT overwater your plants.

As far as Calmag, I don't start adding it to my water until about 3 weeks old. The FFOF is packed with enough nutrients to last 3-4 weeks, so feeding isn't necessary. After 3 weeks, I add 1 tsp of calmag to EVERY watering until mid-late flower.