Hey there BUD! lol bud anyways...teas are great for all stages of the plants life, easy to make/apply and you can customize everything you put in it. Or you could get the BPN products. But either way you will need the things to brew em. So heres what Id get.
1.) 5 Gallon Bucket
2.) An air pump (from pet, hydro or any big box store....with preferably at least 2 ports for the airlines)
3.) Air lines for air pump
4.) As many airstones as airlines you have
5.) Paint Strainer or Panty Hoes (Paint strainer works best, I think and you can reuse)
^^^^And thats it my friend. Figure out if you want to do some bad ass organic teas or the BPN route. Also, at many hydro stores they sell premade teas where all you have to do is open the pouch and bubble it for a couple days and bam. But you will not get as much biological diversity in these. Im talking like 1millionth maybe that you would compared to even a simple Eartworm Casting tea.
Next, after you have got you supplies and figured out what kind of teas you want all you got to do is add R/O water and ingredients and bubble it with the pump and airstones in the bucket for a day or 2 and your girls will love you for it. What the main funtion of teas is to get a microherd in your soil to make a symbiotic relationship with you roots so they can give the plant the nutes from the soil in the amounts it needs. You can also add stuff like guanos and different fertilizers to your teas and feed like that. No more nutes at all. And its all pretty cheap. So if you would like anymore info on things to put in teas, just ask.
I would really advise maybe asking Docbud about teas. As he is a wiz, and who really started the using of High Brix Gardening on MMJ. But he will definitely get you the info youre looking for and his advise is rock solid.
From what I've seen BPN rocks, so if you have these products, I definitely would recommend them
