I understand one of the key components to a successful switch is making sure there is new root growth. I'm doing pretty well with my phals and oncs in that respect. But how do I know when paphs are growing new roots?
I have three paphs all with different stages of growth on their new fans. Is there a standard size of the new fan when you know it has sufficient root growth or do I just have to un-pot periodically and poke around?