Follow our tips to adding a citrus tree to your houseplant collection:  

• Plant indoor citrus trees in a large container filled with well-drained soil.
• Make sure plants receive five to six hours of sunlight.
• For best results, keep daytime temperatures at 65ºF and night temperatures at about 55ºF to 60ºF.
• Use an acidic fertilizer during the plant's active growing season, usually April through September, and water only when the soil is dry.
• It's possible to get fruit from indoor trees, but you'll probably need to hand pollinate the flowers with a thin paintbrush or cotton swab.