Inherited greenhouse_what to do

[Klueless_Kristie]

Hi all :-) I have just inherited my grandfathers greenhouse after 3+ years of neglect. There are over 30 pots of orchids inside, labels are so old the writing is gone. The pots r so root bound the roots are coming over the top and bottom n I can't see the pots from the roots. Nothing has flowered in over 3 years but there are green leaves n shoots inside the pots. Where do I start :-0