Thinking Cal Mag deficiency?

Hello everyone. It all started a few months back when I got some clones of what was supposed to be some killer new cross of a strain. Well they started out beautiful. they were vigorous and strong.

I had 3 and took 3 clones off each one for a buddy. about 2 weeks into flower they started getting some strange leaves and almost a burning or yellowing.

The plants just finished this week and turned out good just didn't yield a ton per plant and I'm thinking it's because of the issue.

Well the clones I gave my buddy are in veg and showing the same leaves. We feed grow micro bloom in veg and flower along with some bloom boosters and some root enhancers. I do feed half strength. Do you think that's the reason for the deficiency? The PH is always between 5.8 and 6.4.

I flowered 9 other plants 6 of one strain and 3 of another and they did not show any signs of deficiency or problems and they were all in the same environment and got the same feedings.

I'll post a pic of the issues and a pic of a bud of the finished plant.

Thanks in advance.

Note I posted some pics of the under sidea of the leafs too.

I don't know but I'm curious to find out. I have the same issue , but I've been giving CaMg every other feeding 5ml/ gal and my ph is going in arou6.5-7 and runoff is 6-6.5. Ivery also added epsom and lime. Hasn't fixed my issue , I'm running autos about 35 days old

Skylan01 said:

I don't know but I'm curious to find out. I have the same issue , but I've been giving CaMg every other feeding 5ml/ gal and my ph is going in arou6.5-7 and runoff is 6-6.5. Ivery also added epsom and lime. Hasn't fixed my issue , I'm running autos about 35 days old

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It sounds like your calcium is all locked up and the plant is unable to access it. My guess is too much potassium built up. Maybe give it a really good flush and then water in a light CalMg solution.

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do you use distilled water?

it might be manganese, had a friend that had water with a lot of iron in it, and he was running cal-mag+, with more iron, and getting stuff that looked like that, the iron was locking out mang. it didn't clear up till he got an ro machine and quit using his well water.

with those purple stems i don't think you have too much K