I totally missed #SunDIY, ironically, because my partner and I were doing, DIY :D
We put some mypex liner in some wooden planters. This should help extend their life (from like 10 to 20 years, we hope) and stop water just seeping away too easily.
We also put a good layer of gravel at the bottom of the planters, so if we do get lots of wet weather, it should reduce the risk of root rot.
Sunbeam City is a Libertarian Socialist solarpunk instance. It is ran democratically by a cooperative of like-minded individuals.