'Mary Washington' Asparagus

Robust, flavorful, and productive heirloom asparagus for many years

“Mary Washington” asparagus ( Asparagus officinalis ), offered by OSC Seeds

“Mary Washington” is an heirloom asparagus variety renowned for its vigor , hardiness , and reliable production year after year. It produces beautiful, straight, fleshy, and flavorful green spears that are excellent grilled, roasted, or steamed. Long-lived, it can produce for 15 to 20 years once established. It is a classic variety in North American vegetable gardens thanks to its adaptation to cool climates and its hardiness.

Propagation: Indoor sowing or direct sowing
Plant height: 100–150 cm (feathery foliage after harvest)
Packet size: Approximately 60 to 75 seeds
Harvest time: 2 to 3 years after establishment (light harvests in the 2nd year)
Frost tolerance: Very hardy (zone 3–4)
Companion plants: Tomatoes, marigolds, basil
Incompatible plants: Onions, garlic
Heritage: Legacy

Planting and maintenance:
Start seeds indoors 12–14 weeks before the last frost or sow directly outdoors in rich, deep, well-drained soil. Transplant or thin to 35–45 cm spacing. Asparagus prefers full sun and slightly sandy soil. Keep the bed weed-free, water regularly, and avoid harvesting during the first year. Cut back the ferns once they turn yellow in autumn. With proper care, this variety will provide abundant harvests for many years.