When is everyone lowering their crib mattress? More so, what milestones should the crib be lowered after reaching? Obviously our LOs aren't standing in their own... Yet

but thus far I've been unable to find solid info on the interwebs. I turn to you trusty bmb and btdt moms!!
Truth be told yesterday baby J was in his crib for the very first time (RnP refluxy baby) We are hoping (I underline hoping) to transition him in the crib this weekend. When I laid him in it he looked so close to the top and so big! I asked my husband if he thought it needed to be lowered and I got the "it's fine" response...
Anyhow in milestone world... J can sit unassisted (but cannot bring himself up unassisted) he rolls belly to back, is starting to get his knees under him while on his tummy, and he loves to stand (obviously assisted haha) He will be six months on the 24th.
Crib lowering thoughts? Advice?
Thank you ladies in advance!
Re: Crib mattress height
I lowered DD's to the middle height when she started sitting on her own. Then lowered it all the way when she started pulling herself to standing.
ETA: lol I should've read the responses first. Ditto @Ilbta85!
#Bodymber14 #Bodygate #itsMillerTime
Bradley 05-04-11 & Tyler 06-18-13