Asparagus is a great perennial crop. It is low maintenance, and quite easy to grow. It can be expensive to buy and tastes much better when home grown. As an added bonus it is available early in the growing season, when few other crops are producing. Asparagus does have some drawbacks, the most significant being that it isn’t very productive for the space it occupies. The large plants take up a lot of room, so it isn’t a good crop for small gardens or intensive beds in general. There is also a long time from planting to first harvest and the harvest season is pretty short (only 6 weeks or so). 

Asparagus is an independent and attractive plant and can be planted in any spare corner of the garden, or even grown as an ornamental. Birds eat the berries and sow the seeds, so given the right conditions it may escape from your garden and naturalize.