Ahh spring is in the air! Even though it's still officialy winter, we in southern Calif. have it nice in that February here is like spring in the rest of the country. Having said that, I love to be outside and start the gardening and upgrading/maintaining previous projects. Being a concrete artist, I like making new projects with concrete and have included two new tree ring segments for this instructable that I have made recently to enclose two new avocado trees. A prior instructable: http://www.instructables.com/id/How-To-Make-Concrete-Tree-Rings/
shows the complete process of making tree rings. Pictures of other art projects are included in the final step.