Board Thread:News and Announcements/@comment-3965346-20150813153538/@comment-26618197-20150822224833

Maybe he thought that the gems already knew at first then when it was revealed that they never knew he was worried that they'd freak out like Pearl did, in fact I bet a future event will occur where Garnet says that they need to see what else Rose stored in there and it might go like this

Garnet: Steven, could you get the stuff from Lion's mane and bring it out here, I think it might be important.

Steven: Ok, just don't freak out.

Garnet: We won't.