Nute burnig. Scared to feed my plants.

I have 5 plants 4 outdoor and one indoor under a skylight(where all my plants started).
Of the 4 plants 2 were in 3.4 gallon pots with ffof and perlite. The other 2 were in 1 gallon one with ffof the other with miracle grow.
I fucked up my first feeding about 2 weeks ago when my plants were about 6-7 weeks old. I was planning to give them 1/4 of the recommended dosages of grow big and big bloom. Grow Big called for 2-3 TBS / gallon and Big Bloom was 6 TBS/gallon. So i went with 0.75 TABLESPOONS of grow big and 1.5 TABLESPOONS of big bloom.
I realized i fucked by using tablespoon instead of teaspoons. but it was too late. I used 2.25teaspoons /gallon of grow big and 4.5 teaspoons of big bloom.
The two plants in the 3.4 gallon pots loved it and now are booming. The two in the 1 gallon pots got eaten up. All the new shoots got burned and stopped growing =(. It took 10 days and they are finally starting new shoots. Although not many.
Now the plant indoors I let sit for another week after watering my outdoor plants. I decided to try my luck at feeding again. This time i was sure to use teaspoons. I used 0.5 teaspoons of grow big and 1 teaspoon of big bloom per gallon and watered my baby. The next day all the tops started curling and i knew what had happened...... WTF. that plant was about 7-8 weeks old and a quarter strength burnt my shit. Now I have to wait around 10 days till I see new shoots. And i will have a lot less tops now.........

Now back to the 2 healthy plants. 2 weeks ago i gave them 2.25 teaspoons/gallon of grow big and 4.5 teaspoons/gallon of big bloom and they seem to be doing great. I just transplanted them into 10+ gallon pots and watered the shit out of them with ph water some where in the mid 6s. When the soil dries up I want to feed again but I'm scared of burning my 2 good plants.

How should i feed the 2 healthy plants? Should i give them the same mixture as i did before? I dont want to ruin them. I tried posting pics of before and after but i dont know how. I did it before but cant now.
Please help.

the nutes more than likely did okay on the healthier ones because they were farther along. I would stop all nutes on the troubled ones for at least a couple of weeks. Let them recover completely, only water them for that time.

If it were me, I'd pinch off the damaged growth and leave well enough alone for a while. If you leave it, it's going to die off anyways with that damage. Once they get better off, give them 2 tsp of big bloom per gallon of ph'd water. It doesn't have a reputation for burning, it's actually quite mild, plus it will help them recover fully.

Keep us posted!

TBS is tablespoon. TSP would be teaspoon.

Im just watering the ones that got sick. I want to know if what kinda feeding I should be giving my healthy ones.

IMHO...you have been using too much nutes, so I would reduce or eliminate for all plants for awhile

^ Yep! For the next couple feedings I would just use PH-right water. Then gradually re-introduce the nutes (maybe 1/4 strength). Good luck with them!!

Keep in mind your using ffof, a hot soil. If you transplanted to bigger pots and put fresh soil (ffof) in there then its gonna kick the ppm up a notch anyways.

If your two healthy plants did fine the last time, I would try giving them the same strength, unless there is a bunch more new ffof (especially if the newer stuff is on the bottom where the roots go). Then you might even want to try something a little less potent. Definitely let the smaller ones get their vigor back