Not really the best time to be planting trees, but we had to out on a job today. Some other guys on site liked my idea so I thought I?d pass it along if you haven?t done it. I always had short pieces of corrugated 4? tile around, so before backfilling I stick two short pieces of 4? perf in vertically on opposite sides of the root ball that will stick above the final mulch layer. After mulch I trim them down to an inch above and we go around and fill the tile as needed and it works great. Water right to the roots. After watering isn?t neede anymore, I just cut the tile low and push it down and mulch over the top. I?ve done the the tree bags and buckets too. Buckets look tacky on some jobs and sometimes tree bags don?t work or I?ve actually had some stolen!