Jack Herer & White Widow

I think it was more underfeeding than PH. But I did start watering more per time, so this could have activated some more lime in the soil. My bed is underfeeding tho since they darkened up 4 days after increasing to 5ml gro and 5ml cal mag per gallon.

if it's burn, i'd guess potassium (K) You'll want to make sure pH is in proper range and check runoff PPM, if you can, before making any drastic changes to fertilizer mix. You are mostly soilless with some worm castings added? So, i guess i'd treat it as more soilless than a soil grow. if yo haven't ensure you get ~10% runoff waste water. maintains soil nute equilibrium. 7-9-5 is kinda concerning ratio for any plant. you will probably constantly run into issues with this ratio. 2-1-2 ratio is what you want - as does a majority of all plants. some boost p/k in bloom phase - once vege growth ceases or ramping up until that point. (vege growth = stems and leaves, and that continues for ~4 or more weeks after 12-12 bloom schedule starts) So, check pH. Make sure it is ~5.8-6.5 ... while you don't want it swinging that much, if you keep it consistently at a value in that range, you'll find a happy zone for your nutes more easily. pH impacts rate of use differently for each nutrient. Runoff PPM - this will *help* inform about concentration of nutes in soil. if it is sky high, you'll want to avoid feeding for an irrigation cycle or two. Your nutes look like they are for a hydro/soilless setup. That means the nutes are chelated and ready for use. stick to that 10% runoff or more with hydro nutes. you are kinda mixing two methods that don't necessarily create synergy together. the slow release worm castings/microbes they provide are just going to throw off the precision of your hydro nutrients in this context. calculating PPM of your fertilizer mix can help too. Use the guaranteed analysis labels. Google "calculate PPM from fertilzer guaranteed analysis labels" or "PPM nutrient calculator" will likely work too. Beware of USA and international standardization differences with P/K. Each week i have a screenshot of my PPMs, if roughly similar ratios, should be fine. You'll want a mix adding up to 1.3-1.5EC (650-750ppm) in most cases.