Well I'm in soil and don't use superthrive in bloom, but I do use calmag atm simply because my plants are recovering from a coco experiment gone horribly wrong, lol!

In the future, I don't expect I will need the calmag, as my old soil method included some bone meal and a bit if fish glop mixed in to the soil of the last transplant, and myco-stim to help release it, and I occasionally add either flora micro or algoflash to the feedings... like, once every week or 2.
stinkyattic Reviewed by stinkyattic on . CalMag and Thrive in bloom... It's my understanding that N should still be fed, albeit in smaller quantities, during bloom but you need to knock it off in the last few weeks. Is this correct? Calmag is rated at 2-0-0 so phasing it out say halfway through bloom would be a good idea? While I'm here, I should also ask if a similar rule exists for hormones a la Superthrive? I hear people mention they use ST all the way until harvest, but I've also picked up that it can actually hinder full errr, fruitilization! :D Rating: 5