South Africa’s agritech sector is reaching beyond the Earth’s atmosphere, using low-Earth orbit as a laboratory for plant biology. An indigenous crop, rooibos, is set to become the country’s first botanical payload on the International Space Station, in a privately led project that combines space science with agricultural research and classroom education.

The Rooibos in Space programme, launched this week at Parklands College’s Innovation Centre in Cape Town, will send seeds of the red tea plant to the ISS in October. There they will be exposed to microgravity and cosmic radiation for several weeks before returning to Earth, where they will be grown alongside a control group of seeds that never left the ground. The comparative study will measure germination, growth, resilience and yield.

The initiative was conceived by the South African Rooibos Council, the industry body representing processors and brand owners, and is delivered in partnership with MaxIQ Space, a South African space-focused STEM education company. The South African National Space Agency is providing support. Together they frame the project as a dual-use experiment: it tests a commercially important crop under space conditions while giving school pupils in the plant’s home region a structured introduction to scientific research.

Seven schools from the Cederberg region, the only place rooibos grows naturally, will conduct the field trial on their return, working with local farms. A parallel experiment at Parklands College, a private school in Cape Town, will provide further comparative data.

“Rooibos has long been part of South Africa’s agricultural heritage,” said Dawie de Villiers, a director of the Rooibos Council. “This project places it within a broader scientific context, where plant biology, space research and education intersect. It also reflects the importance of investing in scientific literacy and skills development for the next generation of researchers and innovators.”

The experiment lands in a period of intensifying global interest in space-based agriculture. Space agencies, including Nasa under its Artemis programme, are funding research into crops that could sustain astronauts on long-duration missions, providing food, oxygen and psychological benefit. The ISS has already hosted experiments with lettuce, peas and soybeans, yielding insights into how plants respond to altered gravity and environmental stress. Rooibos now joins that research lineage, with backers arguing that the plant’s hardiness and unique polyphenol profile make it a candidate for further study in controlled life-support systems.

For South Africa, the project is also a marker of its deepening involvement in the commercial space economy. While the country has a long history in astronomy and satellite engineering, agritech has only recently begun to intersect with orbital platforms. The initiative demonstrates how even niche, non-governmental actors can secure payload slots on the ISS through commercial providers.

“Space science is becoming more integrated into areas that affect daily life, from communications to environmental monitoring,” said Thandile Vuntu, who leads the science engagement unit at the South African National Space Agency. “Initiatives such as this help build awareness of the skills required for future participation in the sector, and align with national priorities around skills development, innovation capacity and strengthening South Africa’s position in emerging scientific fields.”

The educational dimension is embedded in the programme’s design. Beyond running the plant experiment, participating learners will engage in a curriculum-aligned STEM programme covering plant biology, space science and data analysis. South African schoolchildren nationwide will also be invited to design the official mission patch in July and August, extending public engagement beyond the core schools.

Judi Sandrock, founder of MaxIQ Space, said the project aimed to give learners “exposure to real research processes linked to space science. It provides a structured opportunity to develop scientific thinking, data analysis skills and an understanding of how experimentation works in practice.”

The scientific payoff is likely to be modest. Space-flown seed experiments involving single crops rarely yield dramatic, publishable differences; the small sample sizes and uncontrolled variables of a school-led trial limit what can be concluded. Yet the initiative serves as a proof of concept for South Africa’s ability to design, fund and execute a multi-partner space biology project that combines agricultural research with workforce development. It also signals to the global plant-science community that an unusual crop from a biodiversity hotspot is available for off-Earth testing.

Bertram Loriston, deputy director-general for curriculum and assessment management in the Western Cape Education Department, noted the role of cross-sector partnerships in expanding access to science opportunities. “Initiatives that connect education, agriculture and emerging scientific fields make science more accessible to learners,” he said, addressing the Cape Town launch.

The City of Cape Town’s mayoral committee member for economic growth, Alderman James Vos, also attended, underscoring the local government interest in positioning the region as a hub for innovation-driven enterprise.

The seeds are due to fly to the ISS in October. After their return, the results from the Cederberg and Parklands trials will be published on the Rooibos Council’s website. While no commercial space-farmed rooibos tea is imminent, the project places a traditional agricultural commodity at the centre of a modern research infrastructure, testing what happens when a plant that evolved in the fynbos meets the physics of low-Earth orbit.