Mary Washington Seeds

Asparagus Officinalis
Regular price $6.99
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About

Mary Washington Asparagus (Asparagus Officinalis) is a classic heirloom perennial vegetable. Native to coastal Europe and western Asia, it was developed in the U.S. as a rust-resistant selection and remains one of the most planted varieties today. Plants produce thick, tender green spears with distinctive light-purple tips each spring, growing into tall, feathery ferns 4–5 feet high by summer. Hardy in USDA Zones 3–9, Mary Washington Asparagus thrives across a wide range of climates. 

Quick Facts

Life Cycle
Life Cycle Perennial
USDA Zones
USDA Zones 03–09
Light Requirements
Light Requirements Part sun; Full sun
Germination Time
Germination Time 10-20 days
Stratification
Stratification Not required
Spacing
Spacing 12-18 inches
Sowing Method
Sowing Method Start Indoors
Soil
Soil Well-drained; Sandy; Rich
Flowering Period
Flowering Period -
Water Requirements
Water Requirements Moderate (regular watering)
Maturity Time
Maturity Time 3rd year
Growing Habit
Growing Habit Upright

How to Grow & Harvest

Sowing & Timing

Soak Asparagus Mary Washington seeds 48 hours before planting to speed up germination time. Start asparagus seeds indoors 8–10 weeks before last frost, or direct-sow outdoors in mid-spring once soil hits 65 °F. Sow 1/4–1/2 inch deep in a loose, well-draining mix. Germination happens in 10–21 days at 65–85 °F; cooler soil drags it out, warmer soil speeds it up. You can transplant seedlings once they are 10–12 weeks old and hardened off before going into the ground.

Soil, Watering & Fertilization

Full sun is non-negotiable - make sure your plants get six or more hours daily to keep spears strong. They prefer sandy loam with a pH of 6.5–7.0 — asparagus roots rot in waterlogged soil, so drainage is more important than fertility at the start. Work compost into your bed before planting. Water about 1 inch per week; let the top inch of soil dry slightly between waterings. The plant is surprisingly drought-tolerant once roots settle in.

Growth & Harvest

Transplant Asparagus Mary Washington seedlings into trenches 6–12 inches deep and 18 inches wide, spaced 12–18 inches apart in the row. In the first year do not expect harvest, as it's the time when ferns and rooting systems grows. Second year you will get two weeks of light harvest, then stop. By year three, you're cutting 7–9 inch spears for up to 8 weeks each spring. After harvest, leave the ferns standing — they're preparing the root system for next season.

FAQ

Are asparagus plant seeds non-GMO?

Yes. KVITER asparagus seeds for sale are non-GMO, and open-pollinated. Once you buy heirloom asparagus seeds at KVITER, you can get free delivery on orders above $49.

Can I grow asparagus in containers or indoors?

Honestly, not well. Mary Washington Asparagus plants develop deep, spreading root crowns that need real ground or a very large raised bed — minimum 18 inches deep. Mary Washington Asparagus is rust resistant, open pollinated plant seeds for outdoor gardening, and well suited for vegetable gardens, raised beds, and permanent asparagus beds. 

Is this variety easy to grow for beginners?

The germination and seedling stage is straightforward. Low maintenance once established; the plant largely takes care of itself. The harder part is patience — most gardeners give up in year one or two when there's nothing to eat yet. 

What are the best companion plants for asparagus?

Tomatoes and basil planted nearby help deter asparagus beetles. Parsley and marigolds are solid companions too. Avoid planting onions, garlic, or fennel close by — they inhibit asparagus root development. Strawberries are a traditional pairing that uses bed space efficiently in the early years while asparagus establishes.

How do I use the harvested spears?

Fresh asparagus spears are excellent for cooking, blanching, or freezing. The purple-tipped spears from Mary Washington Asparagus are tender enough to eat raw in salads when young.