The White House Kitchen Garden staffers tried "hoop houses," long plastic hoops that covered plants and protected them from the cold, in the winter. While there was a little trial and error – Obama says they had to move the hoop houses farther apart than they originally planned the next year because they needed more room to shovel snow – the hoop houses worked remarkably well. "Some varieties of lettuce grew even better in the hoop houses than during the regular garden season," she wrote.

A large version of a hoop house
By Michael Barera