- Species and varieties: Purple carrot seeds belong to the species Daucus carota. There are several varieties of purple carrots, including 'Cosmic Purple', 'Purple Haze', and 'Purple Dragon'. These varieties are known for their vibrant purple skin and sometimes orange or yellow cores.
- Hybrid or heirloom: Purple carrot seeds can be both hybrid and heirloom varieties. Heirloom varieties like 'Cosmic Purple' are open-pollinated and have been passed down through generations, while hybrid varieties are bred for specific traits such as disease resistance and uniformity.
- Pruning and training: Purple carrots do not require pruning or training. However, thinning the seedlings to about 2-3 inches apart once they are a few inches tall is essential to ensure proper root development and prevent overcrowding.
- Fertilization needs: Purple carrots benefit from a balanced fertilizer applied before planting and again mid-season. A fertilizer with a higher phosphorus content (such as 5-10-10) is ideal for root development. Avoid excessive nitrogen, as it can lead to lush foliage but poor root growth.
- Hardiness zones: Purple carrots can be grown in USDA hardiness zones 3-10. They are quite adaptable and can be grown in a wide range of climates.
- Climate requirements: Purple carrots prefer cool to moderate climates. They grow best in temperatures between 55°F and 75°F (13°C to 24°C). They require full sun to partial shade and well-drained, loose soil to develop properly.