Sikkkaanswered grow question 2 years ago Buy a super fertilized soil(BioBizz -All mix, TopCrop-HeavyMix) -20 euros/60l and BioBizz Starter Pack-40 euros. Thats enough for like 3-5 autoflowering plants for ALL their lifecycle, they will grow big fast, nice and frosty without any problems/deficiencies. you will have to feed them only tap water(no ph needed, just tap water) all their cycle. I'm did it and it works 100%. I wouldnt put less than 3 plants because they wont grow big enough, they are autoflowers.
I'm doing like this but for photoperiods and i add bottled nutrients from mid flowering because they are far bigger plants, but for autos it's not needed.