Bloom booster recommendation

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Do you use Cal Mag during flower?

It greatly depends on the nutrients you are using since Calmag usually is Calcium Nitrate that means has substantial N in it 4-0-0 for some 1-0-0 for other Cal supplements if you were using a N rich formula as a base like many Micro products you would steer clear of 4-0-0 as it would increase N Some product lines like GH have 1-0-0 Cal mag which would be fine for use for first 3-4 weeks of flower during stretch and initial bloom but in soil much of what you use remains stored in media and degra…