Dani, I say go ahead and use it; after three weeks, it's probably become as vigorous as it's going to. You might try feeding it with 100% all-purpose flour, rather than half whole wheat; the whole wheat could be subduing it a bit for some reason. Good luck - PJH
September 27, 2016 at 9:29am
In reply to I've been growing my start for close to 3 weeks! I think it's p… by Dani (not verified)