- Species and varieties: Eggplant (Solanum melongena) is a species in the nightshade family. Common varieties of round eggplant include 'Black Beauty', 'Rosa Bianca', and 'Listada de Gandia'. These varieties are known for their round shape and are popular in organic gardening.
- Hybrid or heirloom: Many round eggplant varieties are heirloom, such as 'Rosa Bianca' and 'Listada de Gandia', which are prized for their unique flavors and historical significance. However, hybrid varieties like 'Black Beauty' are also available and are known for their disease resistance and uniformity.
- Pruning and training: Pruning is not typically necessary for eggplants, but removing the lower leaves and any suckers can help improve air circulation and reduce disease risk. Staking or caging the plants can support the heavy fruit and prevent the branches from breaking.
- Fertilization needs: Eggplants are heavy feeders and benefit from a balanced fertilizer. Apply a 10-10-10 fertilizer at planting and side-dress with compost or a balanced fertilizer every 4-6 weeks during the growing season. Avoid high nitrogen fertilizers, as they can promote foliage growth at the expense of fruit production.
- Hardiness zones: Eggplants thrive in USDA hardiness zones 9-12. They require warm temperatures and are sensitive to frost.
- Climate requirements: Eggplants need a long, warm growing season with temperatures between 70-85°F (21-29°C). They require full sun and well-drained soil with a pH between 5.5 and 7.0. Consistent moisture is crucial, but the soil should not be waterlogged.