Curry tree, Sweet neem, Karipatta, Kadi patta, Karivepaku
Bergera koenigii (syn. Murraya koenigii), commonly called the curry leaf plant, is a small, aromatic evergreen to semi-evergreen tree in the citrus family (Rutaceae). In cultivation it typically reaches 1–3 m in containers and 4–6 m in the ground, forming a sparsely branched canopy with pinnate leaves bearing 15–25 glossy, highly fragrant leaflets. Clusters of small, white, citrus-like flowers appear in warm seasons, followed by shiny black drupes; the pulp is edible but the seeds are considered toxic. The leaves are a staple seasoning in South Asian cuisines and are richest in aroma when fresh. The plant prefers warm, bright, frost-free conditions and well-drained, slightly acidic soils. It develops a pronounced taproot, appreciates regular pruning to encourage bushiness, and can be grown outdoors in tropical to subtropical climates or indoors under high light in cooler regions. Do not confuse it with the unrelated ornamental “curry plant” (Helichrysum italicum), which smells of curry spices but is not a culinary substitute.
Allow the top 2–5 cm of soil to dry between waterings, then water thoroughly until excess drains. Curry leaf is moderately drought-tolerant once established but dislikes soggy roots; consistent, even moisture yields the best leafy growth. Reduce watering in cool, low-light months, letting the soil dry a bit more to prevent root rot. Use a free-draining mix and empty saucers promptly. Indoors, expect faster drying under strong light and increased ventilation.
Provide full sun outdoors (6–8+ hours direct). In hot, arid regions, light afternoon shade can reduce leaf scorch. Indoors, place at a south- or west-facing window with the longest possible photoperiod; supplement with a strong grow light (PPFD ~300–600 µmol/m²/s for 12–14 hours) if needed. Insufficient light causes leggy growth and poor aroma. Rotate the pot regularly for even canopy development.
Feed during active growth (spring through early autumn) with a balanced, dilute fertilizer (e.g., 10-10-10 or 12-6-6) every 3–4 weeks, or use organic feeds like fish emulsion and seaweed. Slightly higher nitrogen supports leafy harvests, but avoid overfeeding, which can reduce aroma and cause salt buildup. In alkaline soils, supplement with chelated iron and micronutrients to prevent chlorosis. Flush the potting mix with plain water occasionally. Do not fertilize in winter when growth slows.
Keep above 12 °C (54 °F) for reliable growth; ideal daytime temperatures are 20–35 °C (68–95 °F). Brief dips near 0 °C (32 °F) can defoliate, and hard frost may kill stems or the plant. Overwinter indoors in temperate climates, placing it in a bright, warm spot away from drafts. Growth slows markedly below 15 °C (59 °F), so reduce watering and stop fertilizing until warmth returns.
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