These Blackboard picks make a great gift for gardeners and greenhouse-dwellers. Included along with 4 blackboard picks, is a pack of chalk to write on them with. The whole kit is enclosed within a small hessian wrap.
Simply write on the pick and drive it into the soil next to your flowers to let others (or remind yourself) what's growing in that pot.
Once the pick has done its job, simply remove from the soil, wipe the chalk off with a cloth and it's ready for the next task.