teak Care (Tectona grandis)

This species needs strong light to build dense wood and healthy foliage.

• Provide 6–8 hours of direct sun daily, ideally with morning and early afternoon exposure; light afternoon shade in very hot, dry climates reduces leaf scorch.
• Young teak tolerates light partial shade, but long-term shade below 4–5 hours of sun leads to tall, weak stems and sparse crowns.
• Keep the canopy free from heavy overstory shading; in monsoon or cloudy seasons, avoid additional shade from structures so the tree captures as much light as possible.

Tectona grandis prefers evenly moist but not waterlogged soil, especially while young.

• Before watering, check that the top 3–5 cm of soil have dried slightly; moist, cool soil at this depth is acceptable, but free water or a sour smell signals poor drainage.
• During active growth and hot weather, increase watering so deeper soil stays slightly moist, watching for wilting, dull leaves, or curling edges as signs of drought stress.
• In cooler or rainy seasons, reduce watering frequency and ensure excess water can drain away; yellowing leaves, soft new growth, and algae on the soil indicate overwatering.

This tropical tree thrives in warm, stable temperatures and is highly sensitive to cold.

• Optimal growth occurs around 77–95°F (25–35°C); growth slows noticeably below 70°F (21°C).
• Avoid temperatures below 50°F (10°C); brief dips toward 40°F (4°C) can damage foliage, and any frost can kill young shoots or saplings.
• Mature trees tolerate short hot spells up to about 104°F (40°C) if soil moisture is adequate, but prolonged heat with dry soil causes leaf drop and marginal scorch.

This species grows best in moderately humid air but adapts to many outdoor conditions.

• Aim for 50–70% humidity in warm growing seasons, especially for young plants or seedlings.
• Dry air can cause marginal leaf browning and slower growth, but established trees usually tolerate it outdoors.
• To boost humidity around container plants, group them together and mulch the soil surface to reduce evaporation.

Tectona grandis prefers deep, well-structured soil that drains freely but does not dry out too fast.

• Use a loamy mix with moderate organic matter, blending garden loam, coarse sand, and compost for structure and nutrition.
• Ensure fast drainage; soil should feel airy, with water soaking in quickly rather than pooling on the surface.
• Target slightly acidic to neutral pH, around 6.0–7.0, to support nutrient availability and root health.
• Improve aeration and avoid compaction by incorporating coarse sand or fine bark chips and never working soil when waterlogged.

This tree can be grown in containers only on a temporary or dwarf scale due to its eventual size.

• Choose a tall, heavy container that resists tipping as the woody stem becomes thicker and top growth heavier.
• Provide a deep root zone so the main taproot can partially develop, which supports stem stability and steady growth.
• Use a mineral-based, fast-draining mix in a rigid pot material to prevent waterlogging and structural bowing as the root mass expands.

Nutrient inputs support faster juvenile growth of teak, especially in containers or poor soils.

• Use a balanced granular or slow-release fertilizer (around 10-10-10 or similar) or well-rotted compost as the main nutrient source.
• Feed during the warm growing season every 6–8 weeks, keeping the root zone evenly moist after application.
• Reduce or stop feeding in cool or dormant periods, when growth slows and uptake declines.
• For young container plants, use liquid fertilizer at 1/2 strength every 4–6 weeks instead of strong, full-dose products.

Thoughtful pruning of Tectona grandis helps develop a strong trunk and safe, stable structure.

• Carry out main structural pruning at the end of the dry or cool season, just before active growth resumes.
• Remove dead, diseased, crossing, or storm-damaged branches first to reduce infection risk and improve airflow.
• Thin crowded interior shoots and low competing branches to encourage a straight leader and balanced crown.
• Use sharp bypass pruners or a clean pruning saw, making small, angled cuts just outside the branch collar.

Transplanting young Tectona grandis carefully is important for establishing a deep, stable root system.

• Look for roots circling the container, water running off quickly, or slowed height increase as signs a seedling is pot-bound.
• Plan transplanting for the early rainy or growing season so roots can recover and extend into moist soil.
• Move container plants every 1–2 years into a pot 5–10 cm wider, or transplant field-ready trees once they reach sturdy sapling size.
• Handle the root ball gently, keep it intact, water thoroughly before and after planting, and shade new transplants for 1–2 weeks to limit stress.

Tectona grandis is most often propagated from seeds, with cuttings used less frequently for uniform stock.

• Collect fully ripe seeds and use pre-treatment such as soaking in warm water 12–24 hours to improve germination.
• Sow in a well-drained, sterile medium at 75–86°F with bright light and consistent, but not waterlogged, moisture.
• For stem cuttings, take semi-hardwood pieces in warm weather, dip in rooting hormone, and place in a high-humidity propagator.
• Keep young plants shaded from harsh sun and maintain even moisture until roots are well developed and new growth is stable.

Tectona grandis is a tropical tree with low frost tolerance and needs careful winter management in cool climates.

• In regions below about 40–45°F, grow T. grandis in large containers that can be moved to a bright, frost-free space for winter.
• Apply a 5–8 cm mulch layer over the root zone in marginal climates to moderate soil temperature and moisture swings.
• Avoid overhead watering in cold periods and remove any frozen, blackened growth in late winter once temperatures stabilize.