What To Know
- White asparagus is a variety of the common asparagus plant (Asparagus officinalis) that is grown in a unique way to prevent the spears from turning green.
- Use a sharp knife or garden trowel to cut the spears at soil level, leaving a small portion of the spear above the ground.
- As you enjoy the fruits of your labor, remember that your white asparagus plants will continue to produce for years to come, ensuring a long-lasting legacy of deliciousness in your garden.
White asparagus, a culinary delicacy prized for its subtle flavor and creamy texture, is a vegetable that can be grown successfully from seed. While it requires patience and dedication, the reward of harvesting your own white asparagus spears is well worth the effort. This comprehensive guide will walk you through the process of growing white asparagus from seed, from selecting the right variety to harvesting your first spears.
Understanding White Asparagus
White asparagus is a variety of the common asparagus plant (Asparagus officinalis) that is grown in a unique way to prevent the spears from turning green. By hilling soil around the plants, sunlight is blocked, preventing chlorophyll production and resulting in the characteristic white color. This technique of “blanching” is crucial for achieving the desired flavor and texture of white asparagus.
Choosing the Right Variety
Selecting the right variety of white asparagus seed is essential for success. Look for varieties specifically bred for white asparagus production, such as:
- ‘Gijnlim’: A popular Dutch variety known for its high yield and excellent flavor.
- ‘Backlim’: Another Dutch variety with a slightly milder flavor and good disease resistance.
- ‘Spangenberg’: A German variety known for its thick, tender spears.
Preparing the Soil
White asparagus thrives in well-drained, fertile soil with a slightly acidic pH (6.0-6.5). Before planting, amend the soil with organic matter such as compost or aged manure to improve drainage and fertility.
Sowing the Seeds
White asparagus seeds are best sown indoors in seed trays or pots filled with a seed-starting mix. Sow the seeds 1/4 inch deep and space them 2 inches apart. Keep the soil moist and warm (70-75°F) for germination, which can take several weeks.
Transplanting the Seedlings
Once the seedlings have developed several true leaves, they are ready to be transplanted outdoors. Choose a sunny location that receives at least 6 hours of sunlight per day. Dig a trench 12-18 inches deep and 18 inches wide. Amend the bottom of the trench with compost or aged manure. Space the seedlings 18 inches apart in the trench and cover the roots with soil.
Blanching the Asparagus
The crucial step in growing white asparagus is blanching, which involves preventing sunlight from reaching the spears. This is achieved by hilling soil around the plants as they grow. Start hilling the plants when they reach 6-8 inches tall. Add soil gradually, ensuring the spears remain covered. Continue adding soil as the plants grow, keeping the spears blanched.
Harvesting White Asparagus
White asparagus spears are ready for harvest when they are 6-8 inches tall and firm to the touch. Use a sharp knife or garden trowel to cut the spears at soil level, leaving a small portion of the spear above the ground. Harvest the spears regularly to encourage continued growth and production.
Caring for White Asparagus
Once the harvest season is over, allow the asparagus ferns to grow and produce seeds. This will help the plants build up energy for the following year. In the fall, cut down the ferns and apply a layer of compost or aged manure to the soil.
Extending the Harvest Season
To extend the harvest season, you can use a technique called “forcing.” This involves creating a “forcing bed” by covering the plants with a layer of straw or hay in the late fall. This helps to protect the plants from cold temperatures and encourages early growth in the spring.
Enjoying Your Homegrown White Asparagus
Once you’ve harvested your white asparagus, it’s time to enjoy its delicious flavor. White asparagus can be steamed, roasted, grilled, or served raw. It pairs well with butter, lemon juice, and herbs.
The End of the Journey, But Not the Story
Growing white asparagus is a journey of patience, dedication, and culinary delight. From selecting the right seeds to harvesting your own spears, the process is rewarding and fulfilling. As you enjoy the fruits of your labor, remember that your white asparagus plants will continue to produce for years to come, ensuring a long-lasting legacy of deliciousness in your garden.
Questions You May Have
Q: How long does it take for white asparagus to mature?
A: White asparagus plants typically take 2-3 years to reach maturity and produce a full harvest.
Q: Can I grow white asparagus in a container?
A: While possible, container growing is not ideal for white asparagus. The plants require a large root system and ample space for growth.
Q: What are the benefits of growing white asparagus from seed?
A: Growing from seed allows you to choose the specific variety you want and enjoy the satisfaction of nurturing the plants from the start.
Q: Can I grow white asparagus in a cold climate?
A: White asparagus can be grown in cold climates, but it may require additional protection during the winter months.
Q: What are some common problems that can affect white asparagus?
A: Common problems include asparagus beetle, rust, and root rot. It’s important to monitor your plants for signs of disease and pests and take appropriate action if necessary.
