Good question! When I bought my first Juniper bonsai, I kept it inside all the time on my windowsill and it died within 3 months. I would try something that grows well in zones 8 and 9, so more tropical plants. Most of these bonsai do well if the temperature stays above 60 degrees. I've been working on ficus bonsai that do well inside, you might want to give a Ficus bonsai a try. Thanks for listening, Jason Garbenis