How to grow a lemon tree on a terrace?

Choose a grafted Kagzi Nimbu (thin-skinned lemon) or Eureka dwarf for containers. Use a 15–20-litre pot with well-draining soil. Repot every 2 years. Feed monthly with citrus-specific fertiliser (high potassium). Water when top 2 inches of soil dry out. Spray neem oil to prevent leaf miner. Grafted trees fruit within 1–2 years. Full sun essential — at least 6 hours daily.