Re: How can you tell when asparagus is too old?
Here is how I grow asparagus, in case you didn’t see on the blog:
My patch is about 20 years old now, and I have filled in a few weak spots as they occurred with new crowns. But (most important) I feed it with all-natural organic fertilizer in early spring or as the shoots poke through and add compost and mulch each year, and I keep it weeded. Weeded=key. Don’t make it compete!