Mangel wurzel (Beta vulgaris subsp. vulgaris), also known as mangold or field beet, is a large-rooted member of the beetroot family. Its swollen roots — which can be yellow, orange, or white — sometimes grow to several kilograms in weight, making it one of the most productive root crops per unit area. The leafy tops closely resemble Swiss chard and are equally nutritious and edible.

Historically cultivated since the 18th century, mangel wurzel was prized primarily as winter fodder for livestock, providing a high-energy feed that stores exceptionally well. Today it enjoys renewed interest among home gardeners and small-scale growers who appreciate its remarkable yields, ease of cultivation, and culinary potential.

In the kitchen, mangel wurzel can be prepared much like other root vegetables — roasted, boiled, steamed, or mashed — offering a mild, subtly sweet flavour reminiscent of beet and turnip. The greens are best enjoyed sautéed, added to soups, or used raw when young and tender. In some traditions, mangel wurzel has even been fermented to produce artisan beverages.

Nutritionally, mangel wurzel provides dietary fibre, vitamins A and C, potassium, and magnesium. Its hardiness, impressive storage life, and versatility make it a valuable addition to any productive garden.

How To Grow

Growing Mangel Wurzel

Soil Preparation

Mangel wurzel grows best in deep, well-drained, fertile soil with a pH of 6.0–7.0. Before sowing, dig the soil to at least 30 cm depth to allow the large roots to develop freely. Incorporate well-rotted compost or aged manure to improve fertility and structure. Avoid freshly manured ground, which can cause forked roots.

Sowing

Sow seeds direct into the ground in spring once the soil has warmed to at least 10°C. Sow clusters of 2–3 seeds approximately 1–2 cm deep, spacing clusters 30 cm apart in rows 30 cm apart. Thin to the strongest seedling per station once seedlings reach 5 cm tall. Mangel wurzel does not transplant well due to its tap root, so direct sowing is strongly recommended.

Watering & Feeding

Keep the soil consistently moist, especially during dry spells, to encourage steady root development and prevent splitting. Mulching around plants helps conserve moisture and suppress weeds. Apply a balanced general-purpose fertiliser at planting, then side-dress with a nitrogen-rich feed as plants establish. Avoid excessive nitrogen later in the season, which promotes foliage at the expense of root size.

Weed Control

Keep the bed weed-free during early growth, as young mangel wurzel seedlings are slow to establish and competition can significantly reduce yields. Hoe shallowly between rows to avoid root damage.

Crop Rotation

Rotate mangel wurzel with other beet family members (beetroot, chard, spinach) on a 3–4 year cycle to reduce the build-up of soil-borne diseases and beet cyst nematode.

Harvesting

Harvesting Mangel Wurzel

When to Harvest

Mangel wurzel roots are typically ready to harvest 4–6 months after sowing, once roots reach 10–15 cm in diameter. They are often left in the ground until after the first light frost, which can improve their sweetness. For long-term storage, harvest before hard frosts penetrate deep into the soil.

Harvesting the Roots

Use a garden fork inserted 15–20 cm from the root to loosen the surrounding soil without damaging the root. Grasp the base of the foliage and lift the root cleanly from the ground. Twist or cut off the leaves, leaving a short stub of about 2–3 cm to reduce moisture loss during storage — avoid cutting into the root flesh, which can lead to rot.

Harvesting the Greens

The leafy tops can be harvested throughout the growing season by cutting outer leaves as needed, allowing the plant to continue growing. Young leaves are most tender and flavoursome.

Storage

Mangel wurzel stores exceptionally well. After harvesting, allow roots to dry briefly in the open air, then store in a cool, dark, and slightly humid environment — ideally between 0–4°C. Roots can be layered in slightly damp sand or straw in boxes and will keep for several months. Check stored roots regularly and remove any showing signs of rot to prevent spread.

Common Problems

Common Problems with Mangel Wurzel

Pests

• Beet leaf miner (Pegomya spp.): Larvae tunnel through leaves, creating pale blotches. Remove affected leaves promptly and destroy them. Covering plants with fine mesh after sowing reduces infestation.
• Black bean aphid: Colonies cluster on the undersides of leaves and on young growth. Encourage natural predators such as ladybirds and lacewings, or apply an insecticidal soap spray.
• Beet cyst nematode: Causes stunted, yellowing plants with poor root development. Practice a strict 3–4 year crop rotation to manage population levels.
• Slugs and snails: Can damage seedlings and young plants. Use physical barriers, traps, or encourage natural predators.

Diseases

• Damping off: Seedlings collapse at soil level in wet conditions. Ensure good drainage and avoid overwatering.
• Downy mildew: Grey-white coating on the undersides of leaves, often in cool, damp conditions. Improve air circulation and avoid overhead watering.
• Cercospora leaf spot: Small, circular brown spots on foliage. Remove and destroy affected material; avoid wetting foliage.
• Heart rot / Boron deficiency: Internal browning of roots and distorted growth caused by boron deficiency. Apply a trace element supplement containing boron if deficiency is suspected.

Bolting

Mangel wurzel may bolt (run to seed prematurely) if exposed to cold temperatures shortly after germination followed by warm weather. Sow at the correct time and avoid very early outdoor sowing in cold soils to minimise this risk.