Monastrell Onion is a long-season bulbing variety that takes 110 days to reach full maturity, rewarding patient gardeners with substantial yields. This cultivar belongs to the Amaryllidaceae family and thrives in well-drained soil with a pH between 6.0 and 7.0. It demands consistent moisture throughout the growing season, making regular watering essential for developing full-sized bulbs. The tight spacing of just 2 inches between plants, with rows 12 inches apart, allows gardeners to maximize production in even modest garden beds.
—
High
3-10
?in H x ?in W
—
High
Hover over chart points for details
Monastrell Onion's extended growing season of 110 days gives it the time needed to develop substantial bulbs with protective papery outer layers ideal for storage. The variety's tight spacing requirements mean you can grow numerous plants in a relatively small footprint, making it efficient for both home and market gardeners. Its high water needs reflect its preference for consistent soil moisture, which supports the formation of large, well-formed bulbs rather than smaller scallion-sized plants.
Monastrell Onion is grown as a storage bulb for culinary use. The mature bulbs can be harvested and cured for long-term storage, making them suitable for cooking applications throughout fall and winter months when fresh onions may be less available.
No timeline data available yet for this variety.
Sow 10-12 seeds in a 4-6 inch pot indoors. If seedling tops exceed 5 inches before transplanting, cut them back to 3 inches to encourage sturdier growth.
When seedlings are ready, carefully separate them and plant in a shallow trench in the garden bed. Space plants 2 inches apart with rows 12 inches apart. Water in well after planting. Transplant timing should allow plants to mature within 110 days before your first frost.
Days to maturity are calculated from direct seeding. Sow seeds directly into garden beds and thin seedlings to the strongest plant when they reach 4-5 inches tall.
Harvest Monastrell Onion once approximately half the tops have fallen over naturally, indicating the bulb has finished its growth cycle. At this point, push over any remaining upright foliage and wait about one week before harvesting. Dig bulbs carefully from the soil and allow them to cure in a warm location (75-80°F) in shade with good air circulation for 2-4 weeks. This curing period allows the outer skin and neck to dry completely. Once fully cured, trim the dried tops, leaving about one inch above the bulb, before moving to storage.
Enter your ZIP code to see a personalized growing calendar for this plant.