It’s now, around January and February, that daikon radishes begin to really sell, said Tamarack Hollow Farm’s farmer Amanda Andrews. She drives down from Burlington, Vermont, every week to sell produce at the Union Square Farmers Market on Wednesdays, and says that only diehard daikon fans really buy them when they’re first harvested in September. At that point in the year, the long, white radishes are often overshadowed by spotlight-stealing fall produce like tomatoes, squash and berries.