So it looks pretty clear your plants are starved for water and nutrients, possibly even root space. Based on your recipe of nutrients I would have to suggest you are using a bit too much fertilizer and at a slight imbalance. Fine tuning organic fertilizer mixes can be a daunting task, even for the experienced grower.
My assumption of what may be happening, is salt toxicity. The salt build up is making it difficult for your plant to take up water...that causes a deficiency in Magnesium...which in turn makes it impossible for your plant to mobilize the nutrients available. When creating your fertilizer recipe, make sure to take the Maximum application of one nutrient as your Max application for all combined (example... you are using organic fertilizers and each one suggests a half cup per 5 gallons soil, but you have four different fertilizers...1/8 cup per fertilizer equals a half cup total). pH can dip severely with excess salts causing even more imbalance. If I was going to try and save these plants I would suggest a larger root zone with a balanced recipe that isn’t too strong, (less is always best when it come nutrients), make sure the pH of both your soil and water source are a spot on 6.2-6.8, transplant and water with either distilled or purified water until you get at least 50% runoff dripping out the bottom of your pots. Then continue to always achieve at least 10% runoff every time you water thereafter.
With the pH dialed in, ample root space, and a nice lean recipe of fertilizers you should be on cruise control! Good luck and I hope this helps!
