Your water is hopefully the best....
Start Nutes at 1/3rd strength... first week mix one third...
NEVER add full strength nutes to a 'TOTALLY DRY PLANT' ....
I water 1/2 amount [that plant would normally need]
then I add nutes...
FYI: If you add full strength harsh chemicals to your extra dry soil,
you "MIGHT" burn roots, which will manifest itself as burnt leaf tips, pointing down...
Every plant you ever grow, start nutes at 1/3 rd strength to 1/2 ....
In a week... what you did last week will show up...
So second week if plants look great, better than week before, then up dose...
Less is more... DO not over do it... Tablespoon, is not a tea spoon...
Good Luck man!