I have used Build a Soils mix . (LoS) fert mix bloom packet.
I followed thier soil mix directions, but before I could use it things changed and it got stored in the garage in 5 gallon buckets for a year.
I "refound" it a few months ago and have a plant (blue dream) in a 3 gallon container of the mix. Water only.
Kinda surprised me. Took bout a week but now it's takeing off like crazy!!
Rivaling my hempy bucket growth!!
I must admit it's not just water but water with
Recharge added, every water.
But looking great so far.
I use Dr Earth in my outdoor vegetable garden with spectacular results.
So see no reason it won't work.
My second container is with lady bug soil Useing espoma ( tomato and bloom) mixed in with a splash of Dr earth tossed in for luck.
This is in a 3 gallon container only water also.
So I am going to see which is better but sure espoma and dr earth will be more cost efficient.
Also espoma is a slow release
While DrEarth is more available faster....