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A Spanish agricultural-inputs group founded in Salamanca in 1812, best known for fertilizers, manures, seeds, gardening products, and related agricultural services.

Last updated August 26, 2026

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Overview

Mirat, formally S.A. Mirat and also known as Grupo Mirat, is a long-established Spanish company based in Salamanca. Founded in 1812 by Gregorio Mirat as a starch manufacturer, the business gradually expanded into several industrial and agricultural activities. Its principal modern activity is the manufacture and sale of manures and fertilizers, making it one of the most established agricultural-inputs businesses in Castile and León and the largest company in Salamanca's agricultural sector according to the referenced account. The company's history reflects the industrial development of Salamanca during the nineteenth and twentieth centuries. Gregorio Mirat brought his son Juan Casimiro into the business in 1853, after which the enterprise became known as Mirat e Hijo. Juan Casimiro later applied experience gained in France to the company's operations. In 1876, the factory moved to a site near the Tormes River, incorporating buildings associated with the former Convent of Nuestra Señora de la Victoria. The same year, Mirat began exporting, marking an early step beyond its local market. The business also produced rice starch from 1881 and was among the first Salamanca factories to use steam power. Mirat's present portfolio extends beyond conventional fertilizers. Group activities described in reference material include seed products, gardening supplies, plant-health products, agricultural machinery, fuel distribution, service points, passenger-bus lines, and winery operations under the Valdeviñas division. The group's gardening business includes the Vitaterra, Vitaterra Nature, and Mas Plant brands. Vitaterra is identified as Spain's largest manufacturer of garden manures and fertilizers. Mirat's industrial site has an additional architectural and heritage significance. The factory is described as the best-preserved surviving example of nineteenth-century industrial architecture in Salamanca. It incorporates remains of the fifteenth-century Hieronymite Convent of Nuestra Señora de la Victoria, including walls, cellars, workshops, brick arcades, stone emblems, and a large vaulted arch attributed to Juan de Álava. This combination of agricultural manufacturing and historic fabric has made the site part of Salamanca's industrial and urban heritage. The company operates principally in Spain and Portugal. No reliable public information in the supplied material establishes a current chief executive, ownership structure, stock-market listing, revenue, or official website URL, so those fields are left unspecified.

History

Mirat traces its origins to 1812, when Gregorio Mirat established a starch factory in Salamanca, Spain. The enterprise did not remain limited to starch: over time it developed multiple industrial and commercial lines, eventually becoming primarily associated with fertilizers and agricultural supplies. A significant early transition occurred in 1853, when Gregorio introduced his son Juan Casimiro into the business. The company subsequently used the name Mirat e Hijo, or Mirat and Son. Juan Casimiro played an important role in the later development of the enterprise. After traveling to France and acquiring relevant industrial knowledge, he helped broaden the company's technical and commercial outlook. In 1876, Mirat began exporting and moved its factory to a location near the Tormes River. The new site was connected with the former Convent of Nuestra Señora de la Victoria, a religious complex founded for the Hieronymite Order in the late fifteenth century. The company continued to diversify its manufacturing. Rice starch production began in 1881, serving uses such as ironing and textile care. Mirat was also among the early Salamanca factories to adopt steam as a source of mechanical power. The company's property portfolio influenced the surrounding city as well: a warehouse near Salamanca's old main square was redeveloped in the early twentieth century, and the area became associated with Avenida de Mirat. The history of the factory is inseparable from the history of the convent site. The Convent of Nuestra Señora de la Victoria had enjoyed several centuries of religious use before suffering major destruction during the Peninsular War. Later industrial interventions removed much of the original complex, but portions survived and eventually came under the control of the Mirat family. The surviving remains include sections of walls, cellars, former workshops, brick arcades, arches, and stone architectural elements. A particularly notable vaulted arch is attributed to Juan de Álava, an architect associated with important Salamanca buildings. In 1933, the company began operating as a cooperative association. In 1963, it entered the production of compound fertilizers, a decisive step toward its modern agricultural identity. Fertilizer manufacturing and agricultural commerce became the core of the business, while additional divisions developed around seeds, gardening, plant health, machinery, fuels, transport, and wine. The group's gardening division includes Vitaterra, Vitaterra Nature, and Mas Plant. Vitaterra is described in the reference material as the largest Spanish manufacturer of garden manures and fertilizers. Alongside these consumer and professional gardening lines, the group has maintained agricultural and related service activities, including wineries under the Valdeviñas division and other support businesses. Mirat's Salamanca factory is regarded as an unusually well-preserved example of nineteenth-century industrial architecture. Its continued association with the convent remains gives the site both industrial and ecclesiastical heritage value. In the modern period, Mirat has remained focused mainly on Spain and Portugal and is described as one of the largest companies in Castile and León, with particular importance in Salamanca's agricultural economy.

  • 1963

    Compound fertilizer production begins

    [1]

    Mirat entered compound-manure production, reinforcing the agricultural-inputs focus that defines its modern business.

  • 1933

    Cooperative association phase

    [1]

    The company began operating as a cooperative association.

  • 1902

    Urban property redevelopment

    [1]

    Casimiro Mirat used a warehouse near Salamanca's old main square for redevelopment, contributing to the area's later association with Avenida de Mirat.

  • 1881

    Rice starch production begins

    [1]

    The company added rice starch production, serving industrial and household uses including clothing care.

  • 1876

    Exporting and factory relocation

    [1]

    Mirat began exporting and moved its factory near the Tormes River, to a site incorporating remains associated with the former Convent of Nuestra Señora de la Victoria.

  • 1853

    Juan Casimiro joins the business

    [1]

    Gregorio Mirat brought his son Juan Casimiro into the company, which later operated under the name Mirat e Hijo.

  • 1812

    Starch factory established in Salamanca

    [1]

    Gregorio Mirat founded the business in Salamanca as a starch factory, establishing the enterprise that later became Grupo Mirat.

Products and positioning

A historic Spanish agricultural-inputs group combining fertilizer manufacturing with seeds, gardening, plant-health, machinery, fuel, transport, and winery activities. Its strongest consumer-facing position is in garden fertilizers through the Vitaterra brand.

  • Agricultural inputs · 1963

    Agricultural fertilizers and compound manures

    Fertilizers and compound manures form Mirat's principal modern business. The company began producing compound fertilizers in 1963, extending its earlier industrial activities into crop nutrition and agricultural supply. The products serve the group's commercial activity in Spain and Portugal.

  • Garden fertilizers and manures

    Vitaterra

    Vitaterra is Mirat's principal gardening trademark and is described as the largest Spanish manufacturer of garden manures and fertilizers. The line represents the group's consumer-facing presence in home gardening and garden soil nutrition.

  • Gardening products

    Vitaterra Nature

    Vitaterra Nature is one of the gardening labels associated with Mirat's gardening division. The supplied material identifies the brand as part of the group's portfolio but does not specify individual products or launch dates.

  • Gardening products

    Mas Plant

    Mas Plant is a gardening brand within Mirat's portfolio. Available reference material confirms its association with the gardening division but does not provide a detailed product catalogue or launch chronology.

  • Agricultural inputs

    Seeds

    Seed products are listed among Grupo Mirat's divisions. The supplied sources do not identify specific seed varieties, proprietary sub-brands, or launch dates.

  • Wine

    Valdeviñas wineries

    The Valdeviñas division covers winery activities and includes the names Mirat, Tinar, and Torrelanga. The available reference material does not provide further detail on the wines or their markets.

  • Agricultural services and equipment

    Agricultural machinery and plant-health services

    Mirat's group divisions also include agricultural machinery and plant-health activities, supporting farmers beyond the supply of fertilizers and seeds. Specific equipment lines and service formats are not detailed in the supplied sources.

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