Do flowers regrow and if they do, how long?
On the subject of regrow ... what about ninroot? What about the ninroot farm?
???
The flowers used to regrow, then there was an update that killed them... don't know if they've fixed the new glitch yet either. The reason I'm so positive was a fluke. In Solitude in front of the Bard's College there is a row of flowers. I was picking my way along up to the college and decided to pick those when I came out. While I was in the college, I had to quit the game for a bit.
While I was out of the game, I got a message that Skyrim had been updated. When I went back into the game and came out of the college all the flowers were
gone! Where flowers had been everywhere when I entered the college, now there were none anywhere in the town. I checked all the other towns I'd visited, and the roads around them, but all the flowers had vanished from the landscape everywhere I'd ever picked them once.
I restarted with a new character and, in some towns, the flowers were still gone. After starting yet another new character, at last the flowers were back, but I don't pick them anymore, as the game is stark enough with them there to really look depressing to me with the flowers all gone.
Maybe they've fixed that glitch since, but I'll never know, since I no longer pick flowers anywhere I plan to go often, sticking to those I find in the wilderness off the main roads.