I know next to nothing about growing asparagus (but I'm thinking about trying them!), but I believe you don't really get to harvest them for a few years after planting. There was an interesting article posted recently concerning asparagus, and although it mostly concerned cooking them, the comment section might be worth a read. Here's a link to the main article:
http://garden.org/ideas/view/T...
And there's some good information in this comment thread:
The thread "My first asparagus from my garden" in
Asparagus, a Spring Delicacy
