Source: Wikimedia Commons
Nepenthes Rajah
AdvancedNepenthes rajah
The world's largest Nepenthes from Mt. Kinabalu, Borneo, with pitchers exceeding 35cm. CITES protected.
About
Nepenthes rajah is a carnivorous pitcher plant of the family Nepenthaceae endemic to Mount Kinabalu and the neighbouring Mount Tambuyukon in Sabah, Malaysian Borneo. It grows exclusively on serpentine substrates, particularly in areas of seeping groundwater where the soil is loose and permanently moist, at altitudes of 1,500–2,650 m above sea level. The species produces the largest pitchers of any Nepenthes, with a capacity exceeding 3.5 liters; besides insects, the pitchers have been documented to contain drowned rats and other small vertebrates. N. rajah is classified as Endangered by the IUCN and listed on CITES Appendix I due to its extremely restricted distribution. Cultivation requires cool highland conditions (days 20–25°C, nights 10–15°C), sphagnum-based media with excellent aeration, and high humidity, making it a challenging but coveted species for advanced collectors.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
Mount Kinabalu and neighbouring Mount Tambuyukon in Sabah, Malaysian Borneo
Lifespan
20+ years
Size
Vine 50-200cm
Temperature
10〜30℃
Humidity
60〜90%
Watering & Fertilizer
Insects, small animals
Growing Tips
Size
World's largest pitcher
Temperature
10-25°C, highland
Rarity
CITES protected
Culture
Very difficult
Nepenthes Rajah FAQ
QWhat is the growing difficulty level for Nepenthes Rajah?
Advanced. A variety suitable for advanced growers. Requires advanced cultivation techniques and specialized equipment, with careful environmental adjustments needed.
QWhat is the ideal temperature for Nepenthes Rajah?
The ideal temperature for Nepenthes Rajah is 10〜30℃. Recommended humidity is 60〜90%. Avoid sudden temperature changes and maintain a stable environment.
QWhat is the lifespan of Nepenthes Rajah?
The average lifespan of Nepenthes Rajah is 20+ years. With proper cultivation environment and nutrient management, you can keep it healthy for a long time.
QHow large does Nepenthes Rajah get?
The mature size of Nepenthes Rajah is Vine 50-200cm. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Nepenthes Rajah?
Nepenthes Rajah: watering & fertilizer — Insects, small animals. Aim for appropriate frequency and amount.
QWhat is the typical price for Nepenthes Rajah?
The price of Nepenthes Rajah varies significantly by variety, characteristics, size, and lineage. Please check ボタちょく's price guide for the latest market information.
Last updated: July 8, 2026
References & Sources
Edited & verified by: BoTachoku Editorial Team
The classifications, regulations, and growing data on this page are created and verified based on the primary information database below.
Taxonomy & Authority
Accepted name: Nepenthes rajah Hook.f.
Authority databases: GBIF · POWO · ICPS 栽培品種登録(国際食虫植物協会)
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
ネペンテス属で唯一N.rajahとN.khasianaのみCITES附属書I(他は附属書II)。
Sources: CITES Appendices (carnivorous plants) - ICPS/Barry Rice / CITES & Carnivorous Plant Checklist (RBG Kew) / IUCN Red List: Nepenthes rajah (EN, 2000)
Regulations may change. Always verify the latest information with the relevant authorities.
Related Species
Find listings for this species
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