Last week, U.S. astronaut Peggy Whitson tweeted a picture of the Chinese cabbageshes growing on the International Space Station as part of an ongoing study called, aptly enough, the Veggie Project. Think about that: Not only can someone use social media from nearly 250 miles above the planet, they can also grow delicious vegetables there, too.

I am growing cabbage on station. I love gardening on Earth, and it is just as fun in space I just need more room to plant more! pic.twitter.com/5hGMltDVCy

Peggy Whitson (@AstroPeggy) February 8, 2017

ThisFriday, the astronauts aboard the International Space Station will harvestand eatthecabbage, a variety called Tokyo Bekana, which is the first cabbage to be grown in space (astronauts have previously growna romaine variety and some flowers, too.)

Like everything else at NASA, how Tokyo Bekana was selectedinvolves research, research, and more research. Short stature and fast growth were the two main traits scientists were looking for in a crop. A variety of plants, including Swiss chard, several lettuce varieties, spinach and beets, were tested and consideredafter all, the whole point is to get the astronauts to eat their veggies. (Just kidding. In actual fact, the project is about figuring out the best way to grow vegetables in space for long-duration trips, such as goingto Mars, and to provide the crew with a means of recreation and relaxation.)

We conducted a survey of several leafy green vegetables and looked at how the crops grew, how nutritious they were, and how a taste panel felt about them, Gioia Massa, a scientist on the project, told Modern Farmer in an email. The Tokyo bekana Chinese cabbage variety was rated as the top in growth and the favorite of tasters.

Since this is space,a special system was needed. The Vegetable Production System(nickname: Veggie) forgoes soil in favor of aplant pillow that includescontrolled-release fertilizer, water, and calcined clay, which helps with aeration. The system, developed byOrbital Technologies Corp,also uses red and green LED grow lights to replacesunlight. A new, large, plant-growing system namedtheAdvanced Plant Habitat(no nick name yet) has been developed and is expected to head up to ISS sometime this year.

According to Massa, one thing the scientist have learned is that the plants are growinga bit more slowly than expected, but are generally growing well. This is pretty much uncharted territory and things dont always go as imagined.

Our testing has revealed that leaves growing under the high CO2 of the International Space Station sometimes have yellowing and we are seeing a little of this yellowing response, she says. Being able to distribute the correct level of moisture and oxygen to plant roots has been one of the biggest challenges we face. Getting other environmental conditions optimal for plants is also a challenge.

The astronauts have already successfully grown (and eaten, and experimented on) red romaine lettuce, but this is the first time Chinese cabbage will be on the menu.Whitson, who loves to garden on Earth, too, has been in charge of growing this round of vegetables.How the crew plans to enjoy this mild and peppery green hasnt been determined. It can be eaten raw as a salad green or sautedin a stir fry. But they only get to eat half the crop as the rest will be used for experiments.

Original post:

The Astronauts on the International Space Station Are About to Harvest Chinese Cabbage - Modern Farmer