Anyone know what would cause the bottom leaves to ...

Hello @JazzyJay! You have a little bit of phosphorus deficiency and a little bit of calcium and its definitely not a PH problem. Your watering PH is at the right range ( 5.8 ) Although it doesn't look like a very aggressive problem. Do not go over 6 as the phosphorus at soilless mediums tends to lock out above 6 PH. Also your EC is a bit low for that stage of growth and i can see from your nutrients that are a little bit weak at phosphorus. Make a good watering with PH'd water at 5.8 and EC 1.6 and necessarily add in that solution the PK heavy from the line of nutrients that you use and you will be fine. After that start to raising slowly your EC. Happy growing ! 👊

Hey man this is classic early P deficiency, make sure add a good chelation agent to your nute mix so your substrate stays healthy with those roots and those nutes ! gonne get some killer bud 🚀

I compared your leaves with The ones with a Phosphorus defiency. And they look the same. The plant needs in the Flowering Stage big amounts of Phosphorus, If she dont get it leaves look like that. You can solve the problem very easyly. Look for a good PH Range. It should be between 6.2 and /. In this range Phosphorus can absorbed the best. Take care of the roots beware of overwatering, (2 liters are much to much) i think your girls will need about 200 ml. You flush the nutrients out of the soil if you give to much water. Give your girl Phosphorus ( into any blloming fertiliser or intoBat guano (phosphorus is readily available, especially if made into a teat) Bone or blood meal (takes quite a bit of time to break down in soil unless made into a tea first) Worm castings or worm tea Soft Rock Phosphate Fish meal Crabshell Happy growing