French astronaut will grow marigolds on the ISS
21.08.2023 - 11:44
/ theunconventionalgardener.com
/ Emma Doughty
Thomas Pesquet’s Alpha mission is about to bloom! The ESA astronaut will soon be growing flowers on the International Space Station, in an experiment called “Graines d’Eklo”.
Pesquet’s task will be to grow French marigolds (Tagetes patula, L’œillet d’Inde in French) in a capsule that includes a light source and a specially developed growing medium. (Judging from the photos, it looks to be a mix of coir and vermiculite and some sort of paper squares that hold nutrients.) A valve in the base of the capsule will allow Pesquet to top up the water reservoir.
The idea behind the experiment is to bring Pesquet “a little closer to Earth”. The team chose French marigolds because they:
– do not exceed the size of 20 cm due to the reduced space, – are adapted to ISS temperatures, – germinate quickly, grow easily and give flowers under laboratory conditions.
Testing showed that Caillard’s double dwarf marigold seeds have an excellent germination rate, so that’s the variety chosen for the mission.
A post shared by Eklo (@eklo.space)
The Eklo capsule launched on the NG-16 cargo supply mission yesterday and arrives at the ISS tomorrow. The experiment will commence soon afterwards.
Here on Earth, 850 people are receiving kits with marigold seeds and instructions so that they can grow their own plants at the same time as the astronaut.
The Earth-bound astrobotanists participating in this Ekosion mission will be sharing a photo of their flowers with the hashtag #EklosionISS and the partners: @eklo.space @graines_caillard @panamseed.
A post shared by Eklo (@eklo.space)
If you want to grow along with the experiment, all you’ll need is some French marigold seeds and a pot to put them in. There’s a downloadable worksheet for keeping measurements,