last you curling leaves is from a few things that added up. your ph was pr is way off, i recommend trying to have it at 6 during your next run, ph has a very important role in plants and the uptake of nutrients so the plant gets what it needs from the cell walls all the way to the leaves, now you also had or have heat issues, this stresses the plants to send all this what the f*ck energy to their leaves and they start dying, to fix this you would flush your plant until you got a run of of 6ph, then you would wait until your pot dried out and the first 2 feedings you would use kelp and cal mag or kelp and Epsom salts , after a few times you will then resume your nutrients at half of what you been doing, now your plants have seen the damage and i also recommend cutting off those dead and dying leaves, your plant is sending energy to those dead and dying leaves, where that energy should go to the healthy green leaves and soon buds. right now by keeping the dead stuff on, you are looking at a lower yield. now with the use of kelp, it also helps with heat stress, along with it is a great additive to use,
here is some info on kelp.
Kelp is an array of massive brown algae (seaweed) that grows underwater and on rocky shores. Kelp is located in regions of the world with cold waters.
The benefits of marine kelp extract to plants have been identified through their active ingredients which include richly available plant hormones and beneficial trace elements (iron, copper, zinc, manganese, calcium, magnesium, sodium, sulfur and others).
5 reasons kelp is good, 1. Bio-stimulation of germination and growth in plant, meaning Kelp contains almost all micronutrients in the readily available form as well as plant hormones; all that encourages plant growth.
Increased Plant Immunity
The kelp extract facilitates the absorption of nutrients and provides powerful plant hormones; this makes the plants healthier and more resistant to diseases. Kelp also contains natural antibiotic properties that can help eliminate harmful bacteria. These features also make seaweed good fertilizer, where antibiotic properties can help protect the leaves from infection and discourage pests. Seaweed extracts are particularly rich in cytokines. Cytokinins stimulate rapid cell division and production of new cell walls, so cytokines are particularly crucial for further growth. If cytokinin is used during vegetative growth, the plants will grow faster with stronger cell walls.
Expanded and Healthy Root Zone
Cytokines work together with other herbal hormones. If, for example, they apply cytokinin during root formation, the cytokines will stimulate the division of multiple root cells. Kelp solutions applied directly to the root zone enhances root, health, and vitality. Starch molecules similar to sponges found in kelp can retain water near plant roots for a long time, making moisture available to roots without saturation. These starches also help to enrich the soil by feeding beneficial microorganisms, bacteria, and fungi. Kelp also acts as a form of soil remediation by improving the overall structure of the soil.
Fortifies Plant Development
Another essential feature of kelp is its rich concentration of vitamins; especially in the form of vitamin B. Vitamins provides the plants the power and energy needed to progress under the stress of accelerated growth rates. These powerful B vitamins can be particularly useful in cloning to reduce the mortality rate of vulnerable young plants.
Increased Yields
The most prominent visual effects of kelp fertilizer will be visible at harvest time. Rich content of stimulants, enzymes, and nutrients will generate more abundant flowers, fruit, and vegetables. Cytokinins applied just before flowering aid the formation of more lateral buds which will help in the overall yield and quality of the budding plants.
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