I've never had a problem with this. I've always just looked for the plants and harvested. I've never really had to wait. I've been looking on and off for 4 days now.
I have my own plants, I bought seeds so no problem with that. Whenever I go to other worlds to harvest, that's the problem. The plants sparkle as they do when ready to be harvested but nothing there and only lets me view them. 5 days now and nothing. I've tried the 5am thing, I was lucky with one plant and not all of them. So def a bug or something.
