NEED ADVICE??????

AD is the most popular line in GH. Advanced Nutrient. Your right just gonna go coco+perlite @GrowCN Thanks for advice on heat pad @Dapper_Buds

What is "AN from General Hydroponics"??? I have used their Bio Thrive Bloom and Grow for over a year. Now I'm on my first grow trying out their MaxiGro and MaxiBloom dry nutrients. I would not rely on biological action warming your soil. You've got to burn a lot of organic matter to generate heat and you won't be able to sustain it throughout a grow. Also, decomposition like that consumes a good deal of nitrogen and you don't want the soil competing with your plant for nutrients. It would be better to run a heater if you need to bring temperatures up.

There are products out there you can mix with your nutes to help them in the cold. I think vitalink do one and I'm sure there are a few other companies around that do it. You could get a tube heater and place that inbetween your pots.

I'm not using a heat lamp, but even if I were what I've read that won't do much either way, I'm using led 100w full spec. Coco+perlite. Will nuts heat that? I know, well what I've read is that it does it for soil so should I add a light biomix to help induce heat through nuts??