Asparagus has a long root system. You can keep it ALIVE in pots but it does not grow or produce well in pots. I kept a series of 3 asparagus plants alive in 16" pots for about 2 years. They did not produce a single stalk during that time. I moved to a new house in 2020 and transplanted them into a large garden bed. They went gangbusters and began producing wonderful, bountiful, thick stalks within 2 yrs.
Asparagus has a long root system. You can keep it ALIVE in pots but it does not grow or produce well in pots. I kept a series of 3 asparagus plants alive in 16" pots for about 2 years. They did not produce a single stalk during that time. I moved to a new house in 2020 and transplanted them into a large garden bed. They went gangbusters and began producing wonderful, bountiful, thick stalks within 2 yrs.