Asparagus officinalis

Asparagus ‘Backlim’ is a premium, all-male variety renowned for its large, high-quality spears and excellent flavor. This mid- to late-season cultivar is ideal for both green and white asparagus production, making it a fantastic choice for home gardeners and commercial growers alike. Notably, ‘Backlim’ has earned the Royal Horticultural Society’s Award of Garden Merit, reflecting its exceptional performance and reliability in gardens. If you’re seeking a reliable, high-yielding asparagus plant that will provide delicious harvests year after year, ‘Backlim’ is an excellent choice.

Asparagus Backlim (Asparagus officinalis) is a late-season, all-male hybrid variety that produces thick, straight spears with a tender texture and superb taste. It thrives in well-drained soil and is resistant to hollowness, making it a popular choice for those who want a dependable crop. This variety is perfect for both green and white asparagus production, offering versatility for different culinary uses.

• High Yield: Produces a significant number of spears each season.
• Late-Season Variety: Complements early-season varieties like Gijnlim for extended harvesting.
• Versatile: Suitable for growing both green and white spears.
• Resistant to Hollowness: Ensures consistent quality.
• Compact Foliage: Requires less space while still offering abundant growth.

1. Preparing the Soil

Backlim asparagus thrives in well-drained soil with good drainage to prevent root rot. Before planting, dig long trenches about 30cm deep and 45cm apart. Fill the bottom with 7cm of well-rotted manure or garden compost to enrich the soil and improve drainage.

2. Planting Asparagus Crowns

Crowns should be planted in early spring or autumn. Spread the roots evenly along the trench, ensuring that the crowns are just visible above the soil. Fill the trench gradually as the plants grow, keeping the spears exposed to encourage strong development.

3. Spacing and Depth

• Plant crowns 20cm apart within each trench.
• Cover with 7cm of soil, gradually adding more as the plants grow.
• Ensure the crowns remain at ground level to avoid rotting.

Watering and Feeding

Asparagus requires consistent moisture, particularly during the growing season. Water deeply once a week, ensuring the soil remains moist but not waterlogged. Apply a dressing of general-purpose fertiliser in spring to support vigorous growth.

Weeding and Mulching

Weeds compete for nutrients and moisture, so remove them regularly. Apply mulch around the plants to suppress weeds, retain moisture, and regulate soil temperature.

Protecting Your Crop

• Use netting to protect young spears from pests.
• Compact foliage helps reduce disease risks, but ensure good air circulation.
• Monitor for pink discolouration on spears, which may indicate fungal disease.

When to Harvest

Backlim asparagus begins producing spears in the second year after planting. Avoid harvesting in the first year to allow plants to establish strong roots. By the second year, spears can be cut when they reach about 20-28mm in thickness.

How to Harvest

Use a sharp knife or asparagus cutter to harvest spears at ground level. Harvest regularly to encourage continuous production.

If you prefer white asparagus, blanch the spears by covering them with soil or a mound to block sunlight. This prevents chlorophyll development, resulting in pale, tender spears.

Key Points to Remember:

• Choose a well-drained site with rich, organic soil
• Plant crowns in early spring in trenches filled with compost or manure
• Water regularly and feed plants with a balanced fertiliser
• Harvest from the second year onwards for best results
• Grow green or white asparagus by adjusting light exposure

By following these steps, you’ll enjoy delicious, homegrown asparagus for years to come.

To see the RHS article please click here

For more information on Fruit for your garden please click here

Frequently Asked Questions

Q: Where can I buy asparagus ‘Backlim’ crowns?

A: You can purchase asparagus ‘Backlim’ crowns from garden centres and online retailers. Be sure to check the quality and age of the crowns before buying!

Q: What is the best way to buy asparagus ‘Backlim’ crowns?

A: It’s best to buy asparagus ‘Backlim’ crowns from reputable nurseries or online shops that specialise in asparagus crowns. Always ensure they are of high quality and the right age for planting.

Q: How do I know if I should plant my asparagus crowns on top or in a trench?

A: When planting asparagus crowns, it is recommended to dig a trench and position the crowns so that they are just visible on top of well-draining soil. This method promotes healthy growth and ensures the crowns establish well.

Q: Can I grow asparagus ‘Backlim’ in a raised bed?

A: Absolutely! Growing asparagus ‘Backlim’ in a raised bed is an excellent choice, especially if you have heavy soil. Just ensure the raised bed has well-draining soil and is positioned in full sun for the best results.

Q: How deep should the trench be for planting asparagus crowns?

A: The trench should be approximately 6 to 8 inches deep. This depth allows the crowns to be properly covered with soil while giving them the space they need to establish and grow.

Q: What kind of soil should I use when planting my asparagus crowns?

A: For the best results, mix well-rotted manure or garden compost with the soil. This creates optimal conditions for planting and helps your asparagus ‘Backlim’ thrive.

Q: When should I expect my asparagus spears to start growing?

A: Asparagus spears typically begin growing in the spring following planting. With asparagus ‘Backlim’, you can expect strong and vigorous growth, provided you give them the right care.

Q: What makes ‘Backlim’ asparagus different from other varieties?

A: ‘Backlim’ is an all-male variety known for its resistance to hollowness and its ability to produce both white and green spears. It is a popular choice for gardeners due to its reliability and high-quality harvests.

Q: How can I ensure that my asparagus plants thrive in subsequent years?

A: To maintain healthy asparagus plants year after year, ensure they receive regular watering, have good drainage, and are enriched with well-rotted manure or compost. Keeping the soil healthy is key to a successful asparagus patch.

Q: Are there any special care tips for ‘Backlim’ asparagus as it matures?

A: Yes! As your ‘Backlim’ asparagus plants mature, continue to monitor soil moisture and provide nutrients as required. Mulching is beneficial for retaining moisture and suppressing weeds, helping the plants to grow stronger and healthier.