TUMSONG

Tumsong is a tea estate in West Bengal, India, situated at an altitude of 1,324 metres and operated by Chamong Tee Exports Pvt. Ltd. The estate produces black tea and is known to supply Morrisons and Sainsbury's, two of the United Kingdom's principal supermarket chains.

Terroir & Climate

At 1,324 metres above sea level, Tumsong occupies an elevation at which estates in the Darjeeling hills typically experience cooler temperatures and higher diurnal variation than those at lower altitudes. This elevation range tends to slow leaf growth during the cooler months, a factor often associated with the concentration of flavour compounds in the flush periods that define the regional calendar.

West Bengal's tea-growing districts generally receive monsoon rainfall from June through September, with drier conditions prevailing in the spring and autumn flush periods. Estates at this latitude and altitude often see misty mornings and moderate daytime temperatures, conditions that can influence the balance of polyphenol development and enzymatic activity during withering and oxidation.

Tea Produced

Tumsong produces black tea. Estates in West Bengal at comparable elevations typically yield orthodox black teas with a range of cup characters depending on the flush period; first-flush production often exhibits lighter body and floral or astringent notes, while second-flush teas from this region can show fuller body, muscatel character, and amber colour. The specific profile will vary with processing technique and the timing of plucking within the season.

Supply Chain & Market Position

Tumsong is recorded as a supplier to Morrisons and Sainsbury's, both major participants in the UK grocery sector. The estate's presence in the supply chains of these retailers indicates that its production reaches a mass-market retail audience, often through blended own-label lines as well as potentially single-estate offerings. Supply to supermarkets of this scale typically requires consistent volume, traceable sourcing, and adherence to retailer-specific ethical and quality standards.

• Recorded supplier to  Morrisons
• Recorded supplier to  Sainsbury's

Operator

Chamong Tee Exports Pvt. Ltd. operates Tumsong and six other estates recorded in this directory. Chamong is an established operator in the West Bengal tea industry, with a portfolio that spans multiple gardens in the region. The company is known both for estate production and for its role in export supply chains serving international buyers.

Location & Neighbouring Estates

TUMSONG lies at 27.0353, 88.1755 in West Bengal, India. Its 1324 m elevation is the 13th highest of 24 estates we map in West Bengal. The nearest estates in the TeaTrade directory, measured point-to-point from these coordinates, are:

• Lingia Tea Estate — 1.2 km away
• Chongtong — 5.3 km away · Darjeeling. West Bengal
• Aloobari — 5.3 km away
• CHAMONG TEE EXPORTS PVT LTD — 6.6 km away
• Soom Tea Estate — 7.0 km away

Estates at a Similar Altitude to TUMSONG

Elevation shapes how slowly leaf matures, so we match TUMSONG (1,324 m) with estates within 150 m of its height that are not its neighbours. Each is shown with its own 2025 climate. TUMSONG recorded 2,294 mm in 2025, within 5% of the 2,277 mm average across these estates, so altitude explains most of its rainfall.

Estate	Where	Elevation	Rain 2025	Mean high
Kelanivalley Plantations, Ingestre	Central Province, Sri Lanka	1,316 m	4,245 mm	22.2 °C
Madulsima Plantations, Battawatte	Uva Province, Sri Lanka	1,333 m	2,709 mm	23.7 °C
Hunan Yiqingyuan Everspring Tea Co., Ltd.	Pu'Er City, China	1,313 m	2,137 mm	24.6 °C
Kinoro Tea Factory	Eastern Province, Kenya	1,307 m	1,008 mm	25.5 °C
Muzizi	Kagadi District of the Bwikara Sub-County, Uganda	1,305 m	1,286 mm	27.2 °C

TUMSONG Compared with West Bengal

In West Bengal, TUMSONG is drier than 91% of the others by 2025 rainfall; lower than 52% of the others by elevation; warmer than 61% of the others by daytime temperature. The table sets TUMSONG against the 23 other estates we map in West Bengal, so you can see whether it is typical for its region or an outlier.

Measure	TUMSONG	Region median	Region range
Elevation	1,324 m	1,332 m	10 to 2,071 m
Annual rainfall (2025)	2,294 mm	2,552 mm	1,859 to 2,870 mm
Mean daily high	21.9 °C	21.0 °C	17.1 to 31.3 °C
Mean overnight low	14.3 °C	14.0 °C	9.5 to 22.7 °C

Observed Climate at TUMSONG (2025)

ERA5 reanalysis data modelled for TUMSONG’s coordinates recorded 2,294 mm of precipitation across calendar year 2025. The wettest month was August (644 mm) and the driest was December (10 mm). Daytime highs averaged 21.9 °C and overnight lows 14.3 °C over the year; July was the warmest month and February the coolest.

Metric	2025 value
Annual precipitation	2,294 mm
Wettest month	August (644 mm)
Driest month	December (10 mm)
Mean daily high	21.9 °C
Mean overnight low	14.3 °C

Frequently Asked Questions

Where is TUMSONG located?

TUMSONG is in West Bengal, India, at coordinates 27.0353, 88.1755, at an elevation of about 1324 metres.

Who operates TUMSONG?

TUMSONG is operated by Chamong Tee Exports Pvt. Ltd., according to public supply-chain records.

What type of tea does TUMSONG produce?

TUMSONG is recorded as producing black tea.

Which buyers does TUMSONG supply?

Public supplier disclosures record TUMSONG as supplying Morrisons, Sainsbury's.

How much rain does TUMSONG receive?

ERA5 reanalysis data for the estate's coordinates recorded 2,294 mm of precipitation in 2025, peaking in August (644 mm).

How does TUMSONG compare with estates at a similar elevation?

Estates at a similar elevation recorded about 2,277 mm of rain in 2025, close to the 2,294 mm at TUMSONG.

Data sources: public supply-chain disclosures (Ethical Tea Partnership member lists, Rainforest Alliance certificate holders and retailer supplier disclosures); climate figures are ERA5 reanalysis modelled for the estate’s coordinates via Open-Meteo (calendar year 2025); coordinates and elevations from geocoded records. Spotted an error? Email [email protected].