Calcium deficiency? Need some help(:

[Bjorn]

I have been growing in living soil and seem to be experiencing calcium deficiency. It first started right when I flipped to flower and I originally fixed it by increasing nutrients, doing a foliar spray, and adding gypsum to the soil. It was fixed for a few weeks and now I am on day 36 and it’s been coming back steadily for a week. I can’t seem to get solid knowledge of solving the issue because no new growth happens now but I just wanted more opinions and potential ideas for solving it since I can’t seem to get it right.

 

[CookiesLikeWhoa]

What makes you think it's a Calcium deficiency?

It seems there some other things going on. Leaves appear to be waxy and dark green, combined with some clawing might point to other imbalances. Tips are burnt a bit as well, seems that higher feeding was a bit hot.

Also you have any pictures of the plant zoomed out? There's some views in the video but they aren't really clear enough.

Watering habits? Feed schedule? Feed? PPFD?

 

[Bjorn]

What makes you think it's a Calcium deficiency?

It seems there some other things going on. Leaves appear to be waxy and dark green, combined with some clawing might point to other imbalances. Tips are burnt a bit as well, seems that higher feeding was a bit hot.

Also you have any pictures of the plant zoomed out? There's some views in the video but they aren't really clear enough.

Watering habits? Feed schedule? Feed? PPFD?

I think it’s calcium based on the symptoms. New growth closest to the light source getting slight yellowing and brown spots is fairly characteristic of calcium deficiency if I’m not mistaken. Leaves aren’t waxy but definitely dark green and clawing. I think the clawing and tip burn may be because of the calcium deficiency as well but I’m not totally sure. They are in earthboxes if you know what that is, it has a 3 gallon res. In the bottom of the pot which I fill and then top water about every 3 days. Top dressing with 3/4 of a cup of build a soils craft blend every 2 weeks, fish shit microbes occasionally, and recently been adding gypsum and some egg shells to the soil. Using a 200w led from HLG at ab 70% power and ab 18-20 inches away from top colas.

 

[Shaded_One]

It was fixed for a few weeks and now I am on day 36 and it’s been coming back steadily for a week.

....add more Gypsum?

2-3tablespoons every 2 weeks in flower.

 

[Moshmen]

I’d say your cal is locked out from other issues - imo

 

[Bjorn]

I’d say your cal is locked out from other issues - imo

Are you thinking ph or something else?

 

[Bjorn]

....add more Gypsum?

2-3tablespoons every 2 weeks in flower.

Heard

 

[mysticepipedon]

This might be more like K lockout from too much N. Dark green, shiny leaves are not a good thing. But none of these pics show the whole plant.

If no one can see which leaves -- uppers, lowers, etc. -- are most affected, you're taking shots in the dark.