"The creek is one of those creatures you love and it loves you back, but every so often it takes a bite out of you, " says Mr. Maida.

WSJ: Flood Cleanup Continues in Duluth

Mighty as the plant is nutritionally, I love it most of all for its peppery bite.

WSJ: Watercress, Springtime's Superfood

But newly legal New Zealand drinkers love them so much, that sparkling Sauvignon Blanc sales have taken a major bite out of the market for RTD Alcopops, long a thorn in the side of the beer and wine industries, not to mention law enforcement and health advocates.

FORBES: New Zealand Whine