Why aren’t all the leaves on my Monstera holey?Updated 3 months ago

It probably isn't old enough yet, or the leaves that aren’t holey are from when it was younger. Monstera don’t have holes, or ‘fenestrations’, in their leaves when they first start growing, and as they age, the new leaves get bigger and have more fenestrations. If the leaf is huge, with lots of holes in, that means it’s a really mature plant!