- Species and varieties: Japanese Mizuna (Brassica rapa var. nipposinica) is a type of mustard green known for its feathery, serrated leaves and mild, peppery flavor. There are several varieties of Mizuna, including 'Kyona' and 'Early Mizuna'.
- Hybrid or heirloom: Mizuna mustard leaf seeds are typically heirloom varieties, meaning they are open-pollinated and have been passed down through generations. However, hybrid varieties also exist, offering improved disease resistance and uniformity.
- Pruning and training: Mizuna requires minimal pruning. Regular harvesting of the outer leaves encourages new growth and prolongs the harvest period. It can be grown as a cut-and-come-again crop, where leaves are harvested as needed.
- Fertilization needs: Mizuna benefits from a well-balanced fertilizer applied at planting and periodically throughout the growing season. A nitrogen-rich fertilizer can promote leafy growth. Organic compost or well-rotted manure can also be used to enrich the soil.
- Hardiness zones: Mizuna mustard leaf seeds can be grown in USDA hardiness zones 4-9. They are quite adaptable and can tolerate a range of growing conditions.
- Climate requirements: Mizuna prefers cool weather and can be grown in both spring and fall. It thrives in temperatures between 45°F and 75°F (7°C to 24°C). It can tolerate light frosts, making it suitable for early spring and late fall planting.