Rocket seeds boldly grow

The countdown is over for staff at the University of Bristol Botanic Garden to find out which collection of seeds they have been growing spent time in space. As part of British astronaut Tim Peake's mission, two kilograms of rocket (Eruca sativa) seeds were sent to the International Space Station last year and were returned to Earth in March after six months on board.

Thousands of schools, children's clubs and societies, including the Botanic Garden, signed up for the national science experiment, Rocket Science, to grow seeds that have been in space together with identical seeds that have stayed on earth. The project, run by the Royal Horticultural Society’s (RHS) Campaign for School Gardening and the UK Space Agency, will help understand how science in space contributes to our knowledge of life on earth.

Two batches of seeds, a red and blue packet, were sent to the Botanic Garden in April, and trainee horticulturist Claire Cope has been monitoring the growth rate of the two batches of seed. Both packets are thriving and beginning to flower and yesterday (Wednesday 22 June) Tim Peake revealed which colour packet went to space.

Nick Wray, Curator of the Botanic Garden, said: "This is terribly exciting. None of us have ever handled something that has been into space. It is a wonderful opportunity to be involved in a science experiment and the closely guarded secret of which packet of seeds went to space has finally being revealed.

"The choice of plant rocket is an obvious one for such a long voyage, the peppery tasting herb is full of minerals and could be one of the first plants to be grown in space if and when expeditions are planned."

The project's aim is to learn more about the effects of weightlessness and radiation on seeds in order to develop plant varieties that can be grown on long space missions. It is also hoped the experiment will inspire participants to think scientifically and see the potential of future careers in STEM (science, technology, engineering, maths) and horticulture.

The plants which are now maturing at the garden will be planted into the Botanic Garden's Ballast Seed Garden display and in the Floating Ballast Seed Garden, which is housed on a disused concrete barge in Bristol's Floating Harbour. The permanent display of non-native plants is a living history of the city's trade and maritime past and the traditional maritime ship voyages are an obvious link to those of 21st century spaceship travel.

Visitors to both the Botanic Garden and the Floating Ballast Seed Garden will be able to see this edible annual plant, commonly known as salad rocket that has made a very long voyage.