Calcium or phosphorus deficiency?

i know I don't have a pest problem.. But, I'm second guessing myself right now. I figure this is a calcium deficiency but wondering if it could be a phosphorus deficiency? Any help would be great! Thanks in advance!

My first question ALWAYS is what's your pH? https://www.sensigarden.com/calcium-deficiency-marijuana/

I didnt make this.

Jypsy Dog said:

My first question ALWAYS is what's your pH? https://www.sensigarden.com/calcium-deficiency-marijuana/

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Thank you! Appreciate the link. I don't have a ph pen but I do have a soil testing kit and the ph of that particular plant dropped significantly. To between 5.5-6.

That looks like a calcium deficiency IMO. Plants don't absorb calcium very well below a pH of 6 with the exception of gypsum. If you have a chelated liquid/powdered calcium product you can foliar spray it and that will help in quick time. I use liquid Biomin Calcium for foliar feeding. Also I'd top dress some form of liming product, e.g. fine powder calcium carbonate and gypsum. The lime should help bring the pH up over time and the calcium in the gypsum should be available immediately.

BushMaster15 said:

Thank you! Appreciate the link. I don't have a ph pen but I do have a soil testing kit and the ph of that particular plant dropped significantly. To between 5.5-6.

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Ph Is way too low for soil grow it is locking out other nutes such as calcium.

I've already pulverized some lime and watered it into the soil.. Could I take some of that lime and make a foliar spray? I live in a very small town and the nearest hydro store is an hour and a half away.

I didn't realize how different growing indoors is. I never had an issue with any of my outdoor crops.. The most I ever had to worry about was mold and bud rot in October.