I need some help with my first grow

I need some help with my first grow.
I planted these three critical Neville haze auto plants on May 31st in 3-gallon pots for outdoor growth. The weather hasn't been ideal, with hail storms and heavy rain, and I made the mistake of overwatering them for the first 3 weeks. I've been using Hesi's TNT fertilizer at half the recommended dosage since week 3, twice a week, and I'm planning to increase it to the full dosage. The plants are still very small (about 13cm tall) and have some dots and a yellowish stain. I've been watering them every 3 days and just started low-stress training (LST) on 2 of the 3 plants today by pinning the main stem to the pot's border with a cable. What can I do so they become healthy and big?
I would appreciate any kind of help
Have a great day!

Don’t water until the pots get light, don’t water on a schedule, water when they need it. Unfortunately as autos, they could go into flower anytime in the next couple weeks. If you’ve got more seeds, learn from the process and drop some more seeds. Certainly grow your current ones to maturity.