Weezy90answered grow question 6y ago Hi!
If you stick to the regular nutrients, the price is actually quite reasonable. You can use them for a long time and often have the choice of small to large bottles. To give an example, I use the organic nutrients from Plagron. Alga Grow, Alga Bloom, and Power Roots (booster for the roots). I think I paid a total of €30 for everything. I've gone through my first grow with this, 2 photoperiod plants, and I still have at least half left in each bottle. There might even be cheaper options out there; you can specifically search for nutrients for weed plants. It's important not to skimp on good nutrients.
Good luck!