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1. That green spear on your plate wanted to be a fern.

Botanically speaking, asparagus is an oddity among vegetables. First of all, farmers only plant a new asparagus crop every 10 or 15 years, and they don't start with seeds. Instead, farmers plant "crowns," which are the roots of 1-year-old asparagus plants. Those roots will grow underground, year after year, and every spring, when the weather gets warm, the roots will send up green spears. If the spears aren't harvested, they will turn into big and bushy ferns.

2. Asparagus spears grow ridiculously fast.

Scott Walker, president of the world's biggest asparagus seed company (Walker Brothers, of Pittsgrove, N.J.), says that he's heard that on really hot days, asparagus can grow an inch per hour. But he's never actually measured them. During harvest season, farmers struggle to stay ahead of the growing spears. Each field has to be harvested every day, and sometimes even twice a day.

"I remember one year, it went from cold to hot, and it looked like the hair on a dog's back out there in the field. It was everywhere, and we could not keep up," Walker says.

After about six or eight weeks, farmers stop harvesting and let them grow wild. The plant needs to grow into a fern to capture energy from the sun and store it in the root for the next growing season.

Asparagus Time lapse from Adam Gregory on Vimeo.

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