My soil is Compo Sana Universal Compact. I just bought it because it seemed to be a decent soil, with perlite and agrosil (root stimulation). I know it is already fertilized but I read in a lot a places that after 3 weeks that is gone so I started BioGrow and Hesi SuperVit. BioBloom is crap? Oh sh... that's exactly what I bought for flowering
Should I give them more than they say or should I but some other fertilizer? What about Hesi fertilizers?
I don't know brands outside Israel so I can't help you with that.
For 3 weeks the ferts in the soil should be sufficient to support the plant. They will still be there for a while but won't be active enough.
MJ requier a lot of ferts so I usually start thinking about feeding after 2 weeks.
BioBloom lacks quite a few things. You could use it, but you would probably want to supplement it with other amendments.
It works on its own, but I never liked the outcomes of it alone.
Hesi is nice, I've used them on my last 2 proper runs.
Its chemical and not organic so it should be managed differently. You should only use it every second or third watering at around 2ml\L.
If you don't mind a little extra work you could bubble indonesian guano (high P) and make a tea (search AACT for more info). You could use half of that and half of the BioBloom final solution.
If its either BioBloom or Hesi Bloom Complex I'd go with Hesi for yield and BioBloom for taste.
Also, I would recycle soil that was used with Hesi nutes. I would recycle soil that was used with BioBizz nutes after a nice flush and a week to settle.
Don't bother overdosing with the BioBloom, it won't solve your problems and it will cost you more money.
P.S.
BioBizz Alg-A-Mic is awesome. For pretty much everything.