Since items/plants/ore/enemies/etc. respawn following a set number of days after their location was last visited by the player in Skyrim, are there any console commands that can be run to check how long ago a certain location was visited? I've been keeping a small list on a piece of paper, but it sounds like something that might be found with a console command, although I have been unable to find any related commands on UESP or The Elder Scrolls wiki.
I'm almost positive there are no ways to find out how long. I'm pretty sure the quickest way to regrow plants is just wait (in game) and keep checking on them.
Although I don't believe there is a command for what you're asking you could use the timescale command perhaps?
If you're waiting for a particular item/plant etc. to respawn and don't mind about building up your day count you could use:
set timescale to x
The default for x is 20 so for every minute that passes realtime 20 minutes will pass in Skyrim. If you changed this to 86400 for example you'd have a whole day passing in just a single second.