Amend the soil with compost or aged manure before planting to enhance nutrition. Water at the base of the plant to avoid wetting the leaves, which can lead to disease. Fertilize with a balanced fertilizer (such as 10-10-10) every 4-6 weeks during the growing season. Alternatively, use compost tea or fish emulsion for an organic approach. Light pruning can help improve air circulation and encourage bushier growth. Prune away any dead or yellowing leaves.
Watch for pests like aphids, spider mites, and whiteflies. Use insecticidal soap or neem oil as needed. Ensure good air circulation and avoid overhead watering to minimize fungal issues like powdery mildew.