Jersey Knight Asparagus Asparagus is a long-lived perennial vegetable crop that is enjoyed by many gardeners. It can be productive for 20 or more years if given proper care. Roots are 2 year old. Select the new all-male hybrid asparagus varieties such as Jersey Giant, and Jersey Knight. These varieties produce spears only on male plants. Seeds produced on female plants fall to the ground and become a seedling weed problem in the garden. Female plants also have to expend more energy to produce the seeds that decreases the yields of asparagus spears on female plants. The all-male hybrids out-yield the old Mary Washington varieties by 3 to 1. Roots received before planting time may be packed in moist soil or sand and stored in a cool place until ready to plant. Plant roots as early in spring as soil can be worked. Choose a sunny location with rich, well-drained soil. When selecting a site, keep in mind that asparagus is a perennial vegetable; planting should not be disturbed. Dig trenches 6-8″ deep and 12-15″ wide. Set roots in bottom of trench, spacing crowns (center) 12-18″ apart in the row. Spread roots out as far as possible and cover with 3-4″ of fine soil. Fill trenches in as shoots grow. Space rows 2.5!–4′ apart.
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