Last year I planted some asparagus plants which needed a year to become
established well enough to be harvested. This year, all but one appear to be
dead, even though they did pretty well last year.

Planting new by seeds takes three years before first harvest.
So my question is, can store-bought asparagus be sprouted (in water, for
example) and planted, and if so, how soon would it be harvestable?

If not, is mature stock available anywhere?

Thanks in advance...