TIMBER TREE
Red Sandalwood Plant
Pterocarpus santalinus — the red-heartwood tree of the Eastern Ghats. Slow, drought-hardy, and unmistakable once mature.
The Red Heartwood of South India
Pterocarpus santalinus — red sandalwood, red sanders, raktachandan — grows wild only in a narrow belt of the Eastern Ghats across Andhra Pradesh, Tamil Nadu and Karnataka. It is valued for dense, deep red heartwood, a colour that develops slowly over decades.
It is not the aromatic white sandalwood (Santalum album): red sanders has no scent and is not a root parasite, so it needs no host plant. It is a straightforward dry-country tree — full sun, sharp drainage, and patience.
Wood and Growth Habit
Growth is genuinely slow — roughly a metre a year in good conditions, and decades before heartwood colour develops. The tree reaches 5–8 m in cultivation. Being a legume it fixes its own nitrogen and copes with poor, gravelly ground that would defeat most trees.
Key Features
✓ Native to the dry Eastern Ghats of South India
✓ No host plant needed — unlike white sandalwood
✓ Nitrogen-fixing legume, thrives in poor soil
✓ Very drought hardy once established
✓ Reaches 5–8 m in cultivation
✓ Deep red heartwood develops over decades
🌱 Recommended Potting Mix
A gritty, sand-led mix — the same recipe we use for white sandalwood.
Red Sanders
Potting Mix
Potting Mix
40% Garden Soil
What is Garden Soil?
Clean, fertile and loose topsoil collected from a healthy garden or cultivation area.
- Loose and easy to crumble
- Free from stones and waste
- Not extremely hard or sticky
- Able to drain excess water
- Loamy soil is preferred
If your garden soil is sticky or clay-heavy, increase the river sand or perlite share and reduce the cocopeat by the same amount.
25% River Sand
Drainage channels; stops compaction.
20% Vermicompost
Slow-release nutrients and microbes.
15% Cocopeat
Holds moisture, keeps the mix light.
Pro Tip: Do not overwater and do not overfeed. This tree evolved on thin, stony, seasonally dry ground.
Growing and Care Guide
Simple essentials for healthy and balanced growth.
Sunlight
Full sun all day. It will not develop properly in shade.
Watering
Water weekly while young, then only in long dry spells. Established trees need almost none.
Soil
Gravelly, sharply drained soil. Poor ground is fine; heavy clay is not.
Temperature
Best growth 20°C to 30°C. Stress below 10°C and killed by frost. Handles 45°C heat.
Fertilizer
Very little. A handful of compost once a year is plenty for a legume.
Pruning
Remove lower side branches in the early years to build a clean straight trunk.
Temperature Tolerance
What this plant enjoys, what it merely survives, and where it stops.
Active growth
Tolerates 7°C – 46°C
It grows best where the mean annual temperature is 26–32°C, and is naturally found across mean annual temperatures of 13–37°C. Those are climate averages for a region, not a daily growing optimum.
0°C
7°C
45°C
48°C
LethalCold stressActive growthWarm — tolerable
❄️ Cold limits
Below 0°C
Killed
The tree is killed by temperatures falling below 0°C. A second source puts the limit at not bearing anything below −1°C.
Below 7°C
Outside its recorded range
The coldest places it grows have minimum temperatures of 7.2–12.7°C. Below that there is no record of it surviving.
🌡️ Heat limits
45–46°C
Extreme maxima it lives through
It grows in regions whose extreme maximum temperatures reach 45–46°C. The species is fire-hardy and drought-resistant, and its natural habitat is hot, dry, rocky hill country at 200–900 m.
Figures from Useful Tropical Plants (tropical.theferns.info, Pterocarpus santalinus) for the tolerance and mean-annual figures, and Antropocene.it for the −1°C limit. Habitat notes from the IUCN Red List assessment and Andhra Pradesh forest survey literature.
Climate Zone Compatibility
Where this plant performs across India’s growing zones.
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Cold hardiness
Killed below 0°C
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Optimal growth temp
Mean annual 26°C – 32°C
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Winter dormancy
Semi-deciduous in the dry season
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Heat stress above
Survives 45–46°C extremes
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Ideal Indian zones
Z10 · Z11 · Z12 · Z13 · Z14 · Z15 · Z18
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Temperature range
7°C to 46°C
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✅ Ideal — thrives here
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Z10 — Tropical Mid-Elevation Monsoon · Winter 9–15°C / Summer up to 38°C
Elevation 600–1,500m · Monsoon 6–7 months · Rainfall 2,500–6,000mm · Humidity 80–95%
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Z11 — Tropical Monsoon Coastal · Winter 14–24°C / Summer up to 38°C
Elevation 0–200m · Monsoon 5–6 months · Rainfall 1,400–4,000mm · No frost ever
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Z12 — Tropical Wet & Dry Savanna · Winter 11–17°C / Summer up to 40°C
Elevation 300–1,000m · Dry season 5–6 months · Rainfall 700–1,600mm · Deccan Plateau — distinct wet and dry seasons
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| ✅ |
Z13 — Tropical WDS Hot Interior · Winter 11–18°C / Summer up to 48°C
Elevation 200–700m · Dry season 6–7 months · Rainfall 700–1,600mm · Summer scorching — 45–48°C peak
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| ✅ |
Z14 — Tropical Wet & Dry Savanna Coastal · Winter 17–22°C / Summer up to 42°C
Elevation 0–400m · Dry season 4–5 months · Rainfall 700–2,000mm · Coastal — humid year-round
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Z15 — Tropical Semi-Arid · Winter 12–16°C / Summer up to 45°C
Elevation 450–600m · Humidity 35–75% · Rainfall 600–900mm · Dry season 7 months
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Z18 — Tropical Hot Semi-Arid · Winter 16–20°C / Summer up to 46°C
Elevation 300–800m · Dry season 7–8 months · Rainfall 500–700mm · Western Ghats rain shadow
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⚠️ Workable — grows, but needs help
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Z5 — Subtropical Monsoon · Winter 8–14°C / Summer up to 38°C
Elevation 50–600m · Monsoon 5–6 months · Rainfall 1,800–4,000mm · Humidity 75–95%
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Z6 — Subtropical Monsoon Highland · Winter 10–13°C / Summer up to 32°C
Elevation 800–1,400m · Monsoon 5–6 months · Rainfall 1,500–3,200mm · Dry season 5–6 months — no frost ever
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Z7 — Humid Subtropical · Winter 8–15°C / Summer up to 42°C
Elevation 100–700m · Dry season 3–4 months · Rainfall 800–2,200mm · Summer hot — 38–42°C
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Z8 — Subtropical Semi-Arid · Winter 5–12°C / Summer up to 44°C
Elevation 10–200m · Dry season 7 months · Rainfall 400–800mm · Semi-arid steppe
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Z16 — Subtropical Hot Semi-Arid Continental · Winter 4–13°C / Summer up to 48°C
Elevation 100–450m · Dry season 6–7 months · Rainfall 600–900mm · Summer scorching — 44–48°C peak
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Z17 — Subtropical Hot Arid · Winter 5–12°C / Summer up to 50°C
Elevation 200–300m · Dry season 9–10 months · Rainfall <400mm · True desert climate
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❌ Not suitable
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Z1 — Cold Alpine · Winter down to −20°C or below / Summer up to 20°C
Elevation 3,000–5,500m · Rainfall <300mm · Dry season 8+ months · Deep dormancy — hardiest conditions
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| ❌ |
Z2 — Cold Hills · Winter down to 1–5°C / Summer up to 25°C
Elevation 1,800–3,000m · Rainfall 700–4,000mm · Monsoon 4–5 months · Full dormancy — excellent vigour
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Z3 — Subtropical Hills · Winter down to 3–8°C / Summer up to 28°C
Elevation 1,500–2,500m · Rainfall 800–2,500mm · Monsoon 4–5 months · Full dormancy — best colour
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Z4 — Subtropical Highland · Winter down to 0–8°C / Summer up to 33°C
Elevation 1,200–2,200m · Rainfall 500–3,600mm · Mixed monsoon · Dormancy sufficient at elevation
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Z9 — Cool Tropical Highland · Winter 5–12°C / Summer up to 28°C
Elevation 1,600–2,500m · Nilgiri Hills / Western Ghats · Rainfall 1,500–3,000mm · Monsoon 5–6 months
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Season by Season
Spring (Feb – Apr)
New flush of leaves as heat builds. Best planting window.
Summer (May – Jun)
Grows steadily through the heat. Water young trees; mature ones cope alone.
Monsoon (Jul – Sep)
Fastest growth of the year. Make sure water drains away from the trunk.
Autumn (Oct – Nov)
Growth slows. Small yellow pea flowers may appear on older trees.
Winter (Dec – Jan)
Semi-dormant, may shed some leaves. Protect young plants from cold nights.
How to Plant
01. Choose an open, permanently sunny site with deep, free-draining ground.
02. Dig a hole twice the width of the root ball.
03. Add the recommended gritty potting mixture.
04. Plant at the original depth without disturbing the taproot.
05. Firm the soil and water in well.
06. Stake for the first year on exposed sites.
Frequently Asked Questions
Is this the same as white sandalwood?
No. White sandalwood (Santalum album) is aromatic and needs a host plant. Red sanders has no scent, needs no host, and is a different genus entirely.
How long until the wood turns red?
Decades. This is a legacy tree, not a quick crop. Growth is roughly a metre a year in good conditions.
Is it legal to grow?
Growing it is permitted. Harvesting, transporting and trading the timber is tightly regulated in India — check your state rules before felling anything.
Will it survive a north Indian winter?
Only in a pot that can be moved under cover. Frost kills it, and anything below 10°C causes stress.
Plant a Tree That Outlives You
Slow, tough and rooted in South Indian soil — red sanders is a tree for the long view.
Growth rate, heartwood development, tree size and flowering may vary depending on plant maturity, climate, sunlight, nutrition, soil and local growing conditions.
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