After searching long & hard for the answer on tinternet, I thought I would ask the professionals 
I wanted well rotted manure mixed with MPC to plant my seedlings into their buckets but I can't get any. I've now decided to just use MPC & then feed for the nutrients Brussel Sprouts need. What exactly do I feed them & how often?

I wanted well rotted manure mixed with MPC to plant my seedlings into their buckets but I can't get any. I've now decided to just use MPC & then feed for the nutrients Brussel Sprouts need. What exactly do I feed them & how often?
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