"John Savage" wrote in message
news:050202000091114.02Feb05
While this may be advisable in some instances, or for some species of
berry plants, it is by no means universally true. My Mum has had a very
productive bed of strawberry plants growing for almost 30 years! They are
about as productive today as they were a year after they were planted.
Annual fertilising, good mulching, pruning off the runners, and choosing
the right plants for the soil and climate would seem to be the key.
Perhaps a disease-resistant species is crucial for long-term cropping?

Are you sure she hasn't been removing the older plants when you weren't
looking?

Bob