Are you only having trouble with your money tree, or are other plants affected as well? My money tree is also growing in Glimmerbrook and it's been working fine. I bought mine from the rewards store and planted outdoors, directly in the ground, if that makes a difference.
Another thing you could try, if the tree looks ready to harvest but you're not getting an option to harvest, is to try placing the tree in the household inventory. I did that trick a couple of times so I can get more fruits to plant and also some to 'gift' to another household.
