There were plants. Lol I honestly don't remember it at all I just remember it came on after Little Bear.

POssibly Teletubbies? There's lots of flowers and green grassy background - also where they live has round type doors - here's the intro..
YouTube - teletubbies intro

Allegra's Window

No, it was with real people, I should have mentioned that. Thanks for your response though! (:

Maybe Fred Penner's Place or The Elephant Show? Those are the two shows I can think of with real people

I think you're thinking of Fred Penner's place. It took place outside and there were a lot of plants. Not sure about the circular door though