I don't have a solution to the nute issue but would suggest do not give up. I had a photo plant started from seed in March. She was molested by the dog during transplant to her final indoor home. She looked real bad but I didn't want to just toss her out so I put her in the ground outdoors. She was uprooted by some varmint two days into her new digs. She's been through, 70mph winds, sub-freezing temps, bug issues, some nute issues, and now summertime heat but today she's over 4 feet tall, about as round as a whisky barrel, and her main stalk is almost two inches thick at the base. I topped her along the way because she was going to be a tall tree, literally. Like you, I respect these plants, so might I humbly suggest that you do not throw in the towel just yet?