Late flowering damaged leaves

Well, first of all- if thats all you have avaliable to you to use for fertlizer, then you need to mix it up with some soil, (prawns, coffee grinds, and some grass clippings or plant material, straw works fine too, and some kind of manure -cow, chicken ect..) and once its all mixed up with some soil, you try to keep it damp if possible for a month MINIMUM, 2 months is better, and every few weeks turn it over and mix it up again with a shovel. If you use 50% soil and the other 50% of the mix is prawns, coffee grinds, straw/hay, manure etc, then once its sat around for a few months it will be ready to use as a fertlizer. You plant is showing signs of both nutrient over load and deficency at the same time, The leaves are burning as the prawns first turn to Ammonia as they start to break down, then Nitrites then Nitrates that the plant can use. So u need to let them break down first before putting them anywhere near your plants. The coffee grinds being very acidic along with the ammonia is likely whats causing the leaf burn. Your plan need potassium - so potatoes and bananas are high in potassium, But it will take weeks to break down and be able to be used by the plant, And your plant will be finished by then. Bat guano would also be a good option to use now if you can get it, mix with water and water in well. But for next grow if you want to stick with organic, mix up a compost in advance and use that for feeding. Summer just finished here and im already planning my compost for next summers grow, I will have it all made up and aging by the start of winter.