Yes, I had a similar experience. It happened when I did something to a seedling or something. In fact, it's what finally stopped me from playing Plant Tycoon. It was GREAT!!... at first.
You could buy the best seed...any and all you wanted... empty all your pots of old plants, fill them with soil, plant them, buy the instant growth liquid... Zap! New plants! Not what you wanted? Trash them all, buy more seed and more instant growth liquid... Yep, it was fun! For about..oh...1 day. lol!
Once the challenge was removed, it became too easy, and suprisingly ...boring. I eventually put it on pause, and have been meaning to go back and start a new game, but just never got back to it. Was fun while it lasted though.

Brenda