The Robinsons Mammoth Giant Onion (often sold as Mammoth Improved) is a prize-winning variety renowned for its massive size and sweet flavor. This onion variety can grow over 6 lbs (2.7 kg) and reach 22 inches (56 cm) in circumference, making it an excellent choice for both competitive exhibition growers and home gardeners. Its uniform bulb shape and golden skin make it visually appealing while maintaining a sweet, mild flavor that is perfect for a variety of culinary uses.
Size: The Robinsons Mammoth onion is famous for its massive size, with individual bulbs often reaching over 6 lbs (2.7 kg) in weight.
Flavor: Despite its large size, this onion is sweet, offering a mild taste that works well in raw dishes, salads, and cooked recipes 🧅🍴.
Appearance: The bulbs have a uniform shape and develop a golden skin once mature, making them a prize-winning choice for exhibition gardens.
Exhibition Quality: This onion has been recognized in the giant vegetable community for many years, winning numerous awards since the 1800s.
Sowing Time: Start seeds early, typically from late December to late February, in a heated propagator or greenhouse 🌱.
Germination: Takes about two weeks at 12°C (54°F). After germination, transfer seedlings to individual pots using a good compost mix (e.g., John Innes).
Transplanting: Harden off the young plants by gradually acclimatizing them to outdoor conditions in a cold frame from mid-to-late March. Plant them outdoors in their final position from mid-April to late April.
Soil and Location: Choose a hot, sunny position with excellent drainage. Enrich the soil with well-rotted farmyard manure, organic materials, and potash for optimal growth.
Watering & Feeding: Ensure the onions are consistently watered throughout the growing season to encourage large bulb development 💧.
Spacing: Leave 4-6 inches between plants to allow each onion bulb enough room to swell without crowding.
Protection: Use cloches in the early stages to protect the onions. Growing under lights indoors after germination will help prevent legginess.
Raw: Excellent in salads, sandwiches, or as a garnish.
Cooked: Ideal for soups, roasted dishes, and stews thanks to its sweet and mild flavor.
Preservation: Can be pickled or used in onion preserves to enjoy the sweet flavor all year round.
✅ Massive size – Can grow up to 6 lbs each
✅ Sweet flavor – Ideal for raw and cooked dishes
✅ Exhibition quality – Award-winning variety since the 1800s
✅ High yield – Perfect for both competitive growing and home gardens
Whether you're looking to grow giant onions for exhibitions or enjoy the sweet flavor in your kitchen, Robinsons Mammoth Giant Onions are a must-have for any gardener. These onions are easy to grow with the right care and produce impressive results. 🌱🧅
🔗 Buy Seeds: Exotic Seeds Store
🔗 Learn More: Wikipedia: Onion
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