For organic indoor or outdoor grows, veggies, houseplants/flowers or pot I used Mermaid fish emulsion for years. Now I use Neptune fish and/or kelp emulsions (there are a few different formulas).
I am just starting, with the last three or four grows to use the specialized fertilizer and suppliments as mentioned by others (not specifically General Hydoponics products) with a lot more experience with them and often they are hydro grows.

I tried Top Max last grow. This grow I'm using 3 part Technoflora plus the "Recipe" suppliments. I dunno, we'll see...

I"m still in soil and I'm not sure yet what works "best" for growing a little weed. I don't think it takes a lot of extra in a good organic soil.

Shov

Shovelhandle