Latitude, heat and salt put Satkhira's mangoes on the market ahead of Rajshahi

Mangoes from Satkhira, the coastal district in south-western Bangladesh, began reaching the country's markets in the first week of May 2026, before Jyaistha, the Bengali month known as the honey month, had even begun. Under the mango calendar set by the district administration, picking of the Gopalbhog and Gobindabhog varieties started on Tuesday 5 May. In Rajshahi and Chapainawabganj, the country's traditional mango heartland in the north-west, picking was due to start on 15 May, BBC Bangla reported on 8 May 2026, so the coast had the market to itself for about ten days.

Agricultural researchers told BBC Bangla that geography explains the head start: Satkhira lies about two degrees of latitude south of Chapainawabganj, its coastal air is warmer, and its soil carries salt. Over the past decade, they said, a district once known mainly for the Sundarbans and its shrimp enclosures has become a new source for the national mango economy, taking a share of a trade that used to belong to the northern districts. Its good taste, and the fact that its fruit reaches the market first each season, play a large part in that, they said.

Satkhira's deputy commissioner announced this year's calendar on Sunday 26 April 2026 at a meeting on safe mango marketing in her conference room, Prothom Alo, Bangla Tribune and the state news agency BSS reported that day. Local varieties, among them Gopalbhog, Gobindabhog, Golapkhas, Baishakhi and Bombai, could be picked and sold from 5 May; Himsagar and Khirsa from 15 May; Langra from 27 May; and Amrapali from 5 June. No variety could be picked, stored or sold before its date, the deputy commissioner said, and law enforcement agencies and the agriculture department would keep strict watch.

The meeting was told that mobile courts, checkpoints and special monitoring teams would work in the field, and that publicity campaigns would make growers and traders aware of the rules. According to the district agriculture office, every variety needs a set time to mature; fruit picked earlier loses taste and quality, which is a major obstacle to selling in international markets. Md Saiful Islam, deputy director of the Department of Agricultural Extension (DAE) in Satkhira, told BSS that the picking dates for Langra and Amrapali had been brought slightly forward at the growers' request, and that the fruit would be mature by then; administrative monitoring of immature picking would continue.

The calendar has been the district's tool against immature and artificially ripened fruit for several seasons. In 2024 picking of Bombai and Golapkhas opened on 9 May, Gobindabhog on 11 May, Langra on 29 May and Amrapali on 10 June, Desh Rupantor and The Business Standard (TBS) reported. In 2025 the calendar, agreed by growers, traders and officials on 30 April, opened on 5 May, with Himsagar from 20 May, Langra from 27 May and Amrapali from 5 June. The 2026 calendar kept the 5 May opening and brought Himsagar forward from 20 May to 15 May.

Enforcement had started before the season opened. In an early-morning raid on 29 April 2026, police in Satkhira seized a truck carrying about 9,000 kg of Gobindabhog mangoes that, TBS reported, had been ripened with chemicals. The driver told TBS that the 351 crates had been loaded at Jironagachha in Kaliganj upazila and were bound for the Chattogram fruit market; the officer in charge of Satkhira Sadar police station said the raid followed confidential information. A mobile court oversaw the destruction of the fruit at a dumping site the same day, and the assistant commissioner (land) warned that legal action would be taken against traders who tried to market unripe mangoes by illicit methods.

"Storms have been fewer than in other years and pests troubled us a little, but on the whole the yield is good. Today I sent 15 crates of Gobindabhog to market at Tk 1,900 a maund," Khan Nazmus Sadat, a grower in Kalaroa upazila, told BBC Bangla. At the start of the season, he said, mangoes in Satkhira had sold at Tk 1,900 to 2,400 a maund depending on variety. Mohammad Shaharul Islam Raj, a local mango trader, said Satkhira's fruit would reach every part of the country within a few days.

The maund (mon) is the traditional South Asian unit of weight, forty seers, generally counted as 40 kilograms in Bangladesh. Opening prices were similar in earlier seasons. On 10 May 2024 TBS found mangoes selling at Tk 1,500 to 2,400 a maund at Satkhira's Boro Bazar, about double the previous year's price because yields were lower, traders said. On the first day of picking in 2025, traders at Sultanpur Boro Bazar told TBS that Gopalbhog and Gobindabhog were selling at Tk 1,800 to 2,400 and going to Dhaka and other parts of the country.

On 4 May 2026, the day before picking began, TBS found traders from across the country already staying in Satkhira town and touring its markets and orchards. A former general secretary of the Boro Bazar wholesale traders' association said prices could not be known until the fruit came to market under the calendar. The Sadar upazila agriculture officer told TBS that traders had been instructed not to sell any chemically treated mangoes, and that he expected mangoes worth Tk 300 to 350 crore to be traded in Satkhira over the following month. A year earlier, growers had told the daily Ittefaq that the district had only one large mango market, Sultanpur Boro Bazar, where the lack of space caused hardship for growers, wholesalers and buyers, and had asked for more selling points.

Dr Md Sharaf Uddin, principal scientific officer at the Regional Horticulture Research Centre, gave BBC Bangla the rule he applies: "For every degree of latitude gained, the mango harvest is delayed by three days." Satkhira lies at 22.60 degrees north and Chapainawabganj at 24.56 degrees, he said, so harvesting in Rajshahi and Chapainawabganj begins at least six to seven days after Satkhira, and later still around Panchagarh in the far north. "A mango of the same variety that is harvested in Satkhira today will be harvested in those areas one to two weeks later, depending on location," he said. The rule is the same for mango growing around the world, he added: the higher the latitude, the later the harvest.

Banglapedia, the national encyclopedia of Bangladesh, places Satkhira district between 21°36' and 22°54' north and Chapainawabganj, which it lists as Nawabganj district, between 24°25' and 24°58' north. Kalaroa, the Satkhira upazila where Khan Nazmus Sadat grows his mangoes, lies between 22°48' and 22°57' north on the border with West Bengal.

Temperature is the second factor, Dr Sharaf Uddin said. "From the time the bud appears, it takes at least 25 to 30 days to open. But if the temperature is higher, the buds open somewhat earlier. Because temperatures are higher in the coastal areas of Satkhira, the mango matures earlier than in other areas." Satkhira has a tropical savanna climate, with an annual average maximum temperature of 35.5°C and annual rainfall of about 1,710 mm, according to the district's encyclopedia entry.

Plant physiologists describe the same tie between temperature and the mango's calendar. In a 2007 review in the Brazilian Journal of Plant Physiology, Thomas L. Davenport of the University of Florida's Tropical Research and Education Center wrote that flowering in the subtropics is driven mainly by the intensity and duration of cool winter temperatures, and that it takes about four months from flowering to fruit maturity. Most producers, he wrote, want to manage flowering so as to obtain an early harvest, because prices are highest early in the season. In Bangladesh the trees flower in the cool, dry months: Banglapedia notes that fog, rain or cloudy weather from January to March, when mango trees flower, harms fruit setting.

Md Saiful Islam of the DAE named soil salinity as another reason. "Because of the geographical location, mango buds come early in Satkhira and maturity also comes early. Besides, salt in the soil reduces the age of anything," he told BBC Bangla. Not only mango but also rice has a somewhat shorter life cycle in the Satkhira area because of salinity, he said, and reaches maturity a little before the usual time. This is his explanation from the field; the BBC report did not cite a study that measured the effect in mango.

Salinity is a defining feature of the coast. Banglapedia's entry on saline soil, citing estimates for 2009, puts the land affected by salinity in Bangladesh at about 1.06 million hectares, on the deltaic floodplains and offshore islands of the coastal districts, Satkhira among them. Coastal soils are slightly to moderately saline at the surface and highly saline in the layers below. Soil salinity starts rising in February and reaches its peak in April and May, the months in which Satkhira's mangoes ripen, and declines sharply after June. Along the coast it is lowest in the north-east and increases towards the west, and the soils of the Sundarbans are highly saline in the west, the encyclopedia says.

Salt has also shaped how the district earns its living. Most people in the southern part of Satkhira depend on fish and shrimp culture in enclosures locally called gher, and the district's export products include shrimp, mango, jute, crabs and handmade clay tiles. The trader Mohammad Shaharul Islam Raj told BBC Bangla that because saline water makes farming uncertain, many Satkhira farmers have turned to mango growing, and the mango business in the district grows every year.

Allegations that fruit is ripened early with chemicals are not new in Bangladesh, BBC Bangla noted, and many buyers distrust fruit that appears at the start of a season or wonder whether it is immature and will taste right. Dr Sharaf Uddin said Satkhira's mangoes come to market a little earlier because of the district's location and weather, and that this has nothing to do with taste. "In the same variety there is not much difference in taste between Satkhira and the Rajshahi region; there may be a slight difference," he said.

Size can differ when there is less rain, he said. In Rajshahi and Chapainawabganj severe drought at this time of year leaves the soil short of moisture, and in that dry weather the fruit grows somewhat larger. On the weather at the time of the report he said: "The rain now falling helps the mango to mature, but if this rain goes on for another eight to ten days, it will be harmful for the mango."

Md Saiful Islam said taste varies somewhat with variety and soil. "Satkhira's Himsagar and Chapainawabganj's Khirsapat are the same mango. But because of the temperature and the salt in the soil, Satkhira's mango is a little sweeter, because the amount of dry matter in it is somewhat higher," he told BBC Bangla.

Himsagar, also known as Khirsapati, is a fibreless variety with yellow to orange flesh. The fruit is medium-sized, weighing 250 to 350 grams, with pulp making up about 77 per cent, and it keeps well. It ripens in May and is mainly grown in Chapainawabganj in Bangladesh and in the Malda, Murshidabad, Nadia and Hooghly districts of West Bengal, where it is registered as a geographical indication. In Bangladesh, Khirshapati is among the mangoes with geographical indication (GI) certification, together with Haribhanga, Langra, Ashwina and Fazli, the researcher Pavel Partha told TBS in July 2024.

The weather had been harder in the north this season. On 26 April 2026 BSS, carried by TBS, reported that a heatwave and a long dry spell were making unripe mangoes drop in Rajshahi's orchards. The Rajshahi weather office had recorded only 1.4 mm of rain on 7 April and 9.2 mm on 28 March, and temperatures had risen sharply from mid-March. The DAE in Rajshahi put the district's mango area this year at 19,062 hectares, with a production target of 244,000 tonnes. Banglapedia notes that mild showers while the fruit develops and enlarges are beneficial, but storms, especially hailstorms, often make immature fruit drop.

Banglapedia counts nearly 100 mango cultivars in Bangladesh, in two broad groups: superior or elite varieties, propagated by grafting and other vegetative means, and local seedling mangoes, popularly called deshi or guti, which have no recognised variety names and whose taste is not assured. Among the elite varieties it lists Fazlee, Langda, Gopalbhog, Himsagar, Khirsapat, Ashwina, Bombai and others. Grafted trees begin to bear fruit in the fourth year after planting and stay productive to about the 45th year, the encyclopedia says.

Gopalbhog and Gobindabhog are the early local varieties that open Satkhira's season, and with it the country's. In April 2025 an additional deputy director of the DAE's exportable mango production project told BSS that the national mango harvest would start with Satkhira's Gopalbhog from 5 May, and in 2026 the district again opened on that date.

Langra, which follows in late May, was first grown in Banaras, in present-day Uttar Pradesh in India, 250 to 300 years ago, and keeps a greenish tinge even when ripe. TBS's 2024 guide to mango varieties noted that the best Langra in Bangladesh comes from Chapainawabganj and that it is among the country's GI-tagged varieties.

Amrapali, the last on the calendar, is a hybrid of the Dasheri and Neelum varieties introduced in 1971, developed by Dr Pijush Kanti Majumdar at the Indian Agricultural Research Institute in Delhi. The tree is a dwarf, regular bearer with clusters of small fruit; its deep orange-red flesh carries about 2.5 to 3 times more beta carotene than other commercial varieties, though it has a shorter shelf life. TBS's guide described it as medium-sized, sweet and smooth, with a smaller seed than traditional varieties.

Satkhira covers 3,817.29 square kilometres in Khulna division, bounded by Jashore district to the north, the Bay of Bengal to the south, Khulna district to the east and the Indian state of West Bengal to the west, according to Banglapedia. It has seven upazilas: Satkhira Sadar, Assasuni, Debhata, Tala, Kalaroa, Kaliganj and Shyamnagar. Shyamnagar is the largest at about 1,968 square kilometres and Debhata the smallest. Satkhira became a sub-division under Jashore in 1861 and a district in 1984. About 1,445 square kilometres of the district lie within the Sundarbans, and its main rivers include the Betna, Kholpetua, Ichamati, Kalindi, Raimangal and Kobadak. The 2022 census counted 2,196,582 people in the district.

Kalaroa, on the northern edge of the district, covers 231.42 square kilometres and has 12 unions. Banglapedia lists mango first among its main fruits, followed by jackfruit, banana, papaya, guava, litchi and coconut, and according to the 2011 census agriculture was the main source of income for 68.89 per cent of its households.

This season about 12,300 growers had planted mango on 4,140 hectares in 5,350 orchards across the district, Md Saiful Islam told Prothom Alo and Bangla Tribune on 26 April 2026, and the DAE's production target was 70,000 tonnes. Satkhira's soil and weather give its mangoes a distinctive taste and aroma, he said; the buds appear earlier than elsewhere and the fruit ripens faster. Since 2015, mangoes from Satkhira have been exported regularly to Europe and other countries, the district agriculture department said.

The mango tree is the national tree of Bangladesh, and the species is considered native to the region that includes Bangladesh, north-eastern India and Myanmar. According to DAE figures reported by BSS in April 2025, the country produced 23,50,499 tonnes of mango on 2,02,968 hectares in the 2020-21 fiscal year; production rose to 27,07,459 tonnes in 2022-23 and stood at 25,08,973 tonnes on 2,05,034 hectares in 2023-24. For the 2025 season the target was 27 lakh tonnes. An official of the exportable mango production project said mangoes are produced mostly in 15 districts, including Rajshahi, Naogaon, Satkhira and Chapainawabganj.

Exports remain small beside that output. The same DAE figures put mango exports at 309 tonnes in 2016-17, 1,757 tonnes in 2021-22 and 3,100 tonnes in 2022-23, falling to 1,321 tonnes in 2023-24; the target for 2025 was about 5,000 tonnes. Bangladesh exports mango to some 38 countries, including the United Kingdom, Italy, France and Canada. China opened its market after the two governments signed a protocol on phytosanitary requirements for fresh mangoes in July 2024, and China's customs authority announced the requirements on 26 July 2024; the first consignment to China was set to leave on 28 May 2025.

In a July 2024 feature, TBS set out the obstacles. Mohammad Arifur Rahman, director of the DAE's Exportable Mango Production project, said exports were held back by the short shelf life of Bangladeshi mangoes and high air freight charges, and that the lack of orchards certified for Good Agricultural Practices (GAP) was a further shortcoming. The exporter Abul Hossain said air freight had risen from Tk 180 to 190 a kilogram to Tk 485. The feature reported that 25 to 30 per cent of the crop is wasted at various stages of the supply chain and that the country has only one quarantine centre. The DAE project, with a budget of Tk 47 crore, runs until June 2027 to train farmers and officials in quality mango production and conservation.

Satkhira's share of that trade is growing. The DAE expected about 70 tonnes of the district's mangoes to be exported in 2025, and the 2026 target is 100 tonnes. Agriculture officials told BBC Bangla that the use of fruit bagging, in which the young fruit is covered with a bag while it grows on the tree, and pesticide-free cultivation have put Satkhira's mangoes on the shelves of European chain stores.

The north runs later and longer. Rajshahi's 2025 calendar, set on 7 May that year, allowed guti mangoes from 15 May, Gopalbhog from 22 May, Rani Pasand or Laxmanbhog from 25 May, Himsagar or Khirsapat from 30 May, Langra from 10 June, Amrapali and Fazli from 15 June, BARI-4 from 5 July, Ashwina from 10 July and Gourmoti from 15 July, TBS reported. Rajshahi's DAE then aimed to produce 260,000 tonnes from 19,603 hectares of orchards.

That longer, later season has its own pressures. In December 2025 the Dhaka Tribune reported that Rajshahi growers, short of fair prices for five or six years, were cutting down orchards: stakeholders claimed more than 1,000 hectares had been felled in two years, while a DAE additional deputy director put the figure at about 450 hectares. Kazi Julfikar Ali, an associate professor of economics at Rajshahi University, told the paper that Rajshahi's mangoes are mostly late varieties that enter the market at the same time as those from Naogaon and Rangpur, causing oversupply and falling prices, and that the lack of storage forces farmers to sell cheaply.

Research on the crop is centred in the north. The Mango Research Station in Chapainawabganj, set up in 1985 on a 30-acre campus, is run by the horticulture division of the Bangladesh Agricultural Research Institute (BARI), the autonomous body under the Ministry of Agriculture that conducts research on all crops except rice, jute, sugarcane and tea. The DAE, formed in 1982 through the merger of several directorates, is the government department responsible for agricultural extension and runs the district offices that set production and export targets such as Satkhira's.

Photo: Masum Ibn Musa / Wikimedia Commons (CC BY-SA 4.0)

Sources: BBC Bangla, Prothom Alo, Bangla Tribune, Bangladesh Sangbad Sangstha (BSS), The Business Standard, The Daily Ittefaq, Desh Rupantor, Dhaka Tribune, Banglapedia, Brazilian Journal of Plant Physiology, Wikipedia