Asparagus is a perennial vegetable that produces edible shoots or spears which may be harvested in April-May. Plants are male or female. Males do not have to expend energy in producing flowers and fruit and typically produce better crop yields. Plants eventually grow into towering ferns in the summer and then die off after frost and are dormant during the winter. Female plants produce red berries in late summer that will drop in autumn and can cause self-seeding problems.