Synonyms:
Genetics: Tenasserim Hills Landrace
Type: Point of origin, open pollinated
Style: Ganja, seeded flowers
Farmer: Various
Sourcing: Éloïse (2021, 2022)
Village(s): Undisclosed
District: Kaeng Krachan
Province: Petchaburi
Area: Kaeng Krachan National Park
Region: Western Thailand
Appellation: Kaeng Krachan
Country: Thailand

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Cultivation Details:

Regional Planting: July - September
Regional Harvest: January - March
Height: 2-4 metres
Classification: NLD type Landrace Population

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Description:

Tanaosri is a rare and historically significant landrace originating from the Tenasserim Hills in Kaeng Krachan National Park, a region known for its rugged terrain, biodiversity, and long history of cannabis cultivation. This landrace has been traditionally grown by Karen communities and Thai Communist insurgents, playing a key role in the region's political and economic history since the 1960s.

Characterized by tall, fast-growing plants with long, internodal spacing, Tanaosri exhibits classic Southeast Asian sativa morphology. The flowers are resinous and aromatic, exuding spicy, woody, and citrus-forward terpenes with deep incense undertones.

Highly adapted to the humid, monsoonal environment of the Tenasserim Hills, these plants are known for their exceptional pest and mildew resistance and their ability to thrive in diverse microclimates, from lowland jungle clearings to high-altitude forest terraces.

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Context:

The Tenasserim region—historically known as "Tanah Seri" or "The Glowing Land"—has been a center of trade, conflict, and migration for thousands of years. Once part of Suwarnabhumi and the Kingdom of Thaton, it later fell under Khmer and Burmese control, before being contested in the Siamese-Burmese Wars.

The Karen people, who migrated from Yunnan centuries ago, brought with them cannabis and agricultural knowledge, interweaving their own cultivars with the indigenous Thai landraces. By the mid-20th century, this region became a stronghold of both the Thai Communist insurgency and the Karen resistance against the Burmese state, with cannabis serving as a key cash crop that funded both movements.

However, the region's indigenous farmers have faced relentless oppression under Thailand’s conservation policies. Karen villages in Kaeng Krachan National Park have been burned down, entire communities forcibly evicted, and indigenous land rights systematically erased under the guise of environmental protection—despite the fact that illegal logging and poaching by corporate interests continue unchecked.

Today, Thailand’s new cannabis legislation has opened doors for commercial growers, but the original Karen farmers remain completely excluded, lacking legal recognition, land rights, and any pathway to obtaining cultivation licenses. Meanwhile, the Tanaosri genetics have been appropriated by research institutions such as Suranaree University and widely dispersed among Thai commercial growers.

The future of true Tenasserim landraces remains uncertain, as mass hybridization and industrial cultivation threaten to displace traditional open-pollinated populations forever.

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Accession and Selection Details:

Tanaosri General Population (2021, 2022)
Notes: A broad-spectrum accession collected by Éloïse
Type: General Population, Domesticate Landrace
Altitude: 200-600m

Tanaosri ‘Red’ Selection (2021, 2022)
Notes: A selection of highly resinous, red-stemmed plants
Type: Selected Domesticate Landrace
Altitude: 200-600m

Tanaosri ‘Green’ Selection (2021, 2022)
Notes: A selection emphasizing vigorous growth and larger plants
Type: Selected Domesticate Landrace
Altitude: 200-600m

Tanaosri ‘White’ Selection (2021, 2022)
Notes: A rare selection showcasing lighter-colored, resin-heavy phenotypes
Type: Selected Domesticate Landrace
Altitude: 200-600m

Tanaosri ‘White’ Reproduction (2024)
Notes: Tanaosri reproduction by Seeds of Peace in Nakhon Phanom
Type: Selected Domesticate Landrace Reproduction
Altitude: 200-600m

Tanaosri ‘Slowman’ Reproduction (2025)
Notes: Tanaosri reproduction by Slowman Farm inTrang
Type: Selected Domesticate Landrace Reproduction
Altitude: 200-600m

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Current Status:

The Tanaosri genetics have been widely dispersed, appearing in the hands of multiple legal Thai cannabis growers after having been worked on by the Suranaree university among other government institutions.

However, the original Karen farmers have been completely excluded from the industry, lacking the legal rights and infrastructure to compete in Thailand’s newly opened market.

2022 saw a drastic reduction in the size of the remaining fields, as illegally grown, authentic landrace cannabis was displaced by the influx of mass-produced polyhybrids flooding the domestic market.

Limited stock of the 2021 Tanaosri harvest remains available—potentially the last of its kind from the original source.

A return expedition is needed to assess the situation, support conservation efforts, and document any surviving landrace cultivation.

Join us on Patreon to help fund landrace preservation before it's too late!

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Tanaosri

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