- Species and varieties: Italian parsley (Petroselinum crispum var. neapolitanum) is a variety of parsley known for its flat leaves and robust flavor. It is often used in Mediterranean and Italian cuisine. Common varieties include 'Giant of Italy' and 'Flat Leaf'.
- Hybrid or heirloom: Italian parsley seeds are typically heirloom varieties, meaning they are open-pollinated and have been passed down through generations without genetic modification. This ensures the preservation of their original characteristics and flavor.
- Pruning and training: Regular harvesting of the outer leaves encourages new growth and prevents the plant from bolting (going to seed). Pruning should be done by cutting the stems at the base, close to the soil level.
- Fertilization needs: Italian parsley benefits from a balanced fertilizer applied every 4-6 weeks during the growing season. Organic compost or a slow-release granular fertilizer can be used to provide essential nutrients. Avoid over-fertilizing, as this can lead to excessive leaf growth with reduced flavor.
- Hardiness zones: Italian parsley is suitable for USDA hardiness zones 4-9. It can tolerate light frost and can be grown as a biennial in milder climates.
- Climate requirements: Italian parsley prefers a temperate climate with full sun to partial shade. It thrives in well-drained soil with consistent moisture. Ideal growing temperatures range from 50°F to 70°F (10°C to 21°C).