Calamansi (Citrus mitis), beloved for its tangy, vitamin-rich fruits, is a compact citrus tree often grown indoors or on balconies. It’s become a favorite among beginners for its resilience, year-round greenery, and productive harvests—even in small spaces.
Light Requirements
Calamansi thrives in bright, indirect light but can adapt to a few hours of direct morning sun. Place your Calamansi near an east- or south-facing window for best results. If using artificial light, aim for 10–12 hours daily. Insufficient light can reduce fruiting and make the tree leggy. Rotate the plant occasionally so all sides receive equal exposure.
Watering Schedule
Water your Calamansi when the top inch of soil dries out—usually once a week indoors, depending on your room’s humidity and light levels. Too much water may cause yellowing leaves or root rot; too little leads to drooping or leaf drop. Always use a pot with drainage holes. No need for a humidifier unless indoor air is very dry.
Humidity & Temperature
Calamansi prefers moderate humidity and temperatures between 18–27°C (65–80°F). Avoid placing it in direct line with heaters, air conditioners, or drafty windows, as cold or dry air can stress the plant. Protect your Calamansi from sudden temperature changes, especially during winter months.
Soil & Potting
Use a well-draining potting mix—commercial citrus soil or a blend of potting soil with sand and perlite is perfect. Repot Calamansi every 2–3 years, or when you notice roots circling the pot, to refresh nutrients and space for growth.
Fertilizing
Fertilize your Calamansi every 4–6 weeks during spring and summer with a balanced or citrus-specific fertilizer. Less feeding is required during fall and winter; too much can cause salt buildup and leaf burn.
Common Problems & Solutions
Yellowing leaves may indicate overwatering or poor drainage; allow soil to dry more between waterings and check pot holes. Browning leaf edges often result from under-watering or too much direct sun. Watch for pests like aphids or scale—remove with insecticidal soap. Leaf drop may signal stress or sudden changes in temperature or light.
Extra Tips
Support your Calamansi with a small stake when laden with fruit. Consider grouping with rosemary or basil for a fragrant display. The compact tree can be shaped into a bonsai, and its tart fruits are fantastic for drinks and cooking. The more you harvest, the more it keeps producing!
