It's fine here, sounds to me like you've got your settings messed up.
At the bottom of the page when you're in the garden section there should be some options, the third drop down box is from how long ago it will show the posts. It should be set to 'Show All' if you want to see all posts. If it's set to say 25 days and newer there's only 1 thread up in the forum.
Hope it is that, else I wouldn't know what's going on.
--Edit--
Forgot to mention, after you've set it to 'Show All' hit the go button to the right of it, if you dont hit the go button it won't change anything.