I did a post recently on remembe'ring' where seeds were planted. http://craftygardener.blogspot.ca/2012/03/remembering-where.html I saw an idea in a catalogue using the tops of pots, and decided I could make the same thing from recycled plastic containers. So I cut off the tops and presto, a great idea came to life. You can put the rings around the area in the garden where you have planted seeds to mark where they are Or you can put them around plants over the winter, so that you know where they will grow in the spring.