We're having a little difficulty deciding on how to build my planters on the corners of each post of the pergola. Because I run a daycare centre in the back yard, I need the planters to be appr. 3' high so that the kiddies can't pull the plants out and dig in the planters. Rather than explaining, here's my plan on how the planters will be at each post: http://www.bhg.com/bhg/story.jhtml?.../bhg/story/data/12371.xml&catref=SC781&page=3 The instructions on #7 tell us to build the planters around the posts, so I'm guessing it would be fine. Just not sure how long the posts would last if they're in moist soil all the time. The posts are pressure treated wood, and my worry is that the posts might start to rot over time because they're in the planters with soil around them. Any ideas on this? My hubby says we should see if we can find some PVC pipe to slide over the posts so they're not touching the wet soil. Either way, I need to decide before we go on with the pergola.