PHOTOS: National Pick Blueberries Day - July 10

A seasonal worker picks blueberries on June 28, 2009 at a farm in Klaistow, eastern Germany, where blueberries are cultivated on an area of 55 hectares. AFP PHOTO DDP/ MICHAEL URBAN GERMANY OUT (Photo credit should read MICHAEL URBAN/AFP/Getty Images)

LUBOTEN, SERBIA AND MONTENEGRO: Two young ethnic Albanians collect blueberries on the Luboten mountain, southern Kosovo, 03 September 2006. The Luboteni mountains have the highest peak in Kosovo, and the blueberries there are know for their quality. Youth from neighbouring villages walk each day, nearly four hours in a row, to climb the hill and collect blueberries, and return home by sunset.AFP PHOTO / ERMAL META (Photo credit should read Ermal Meta/AFP/Getty Images)

LUBOTEN, SERBIA AND MONTENEGRO: An ethnic Albanian, works with blueberries (also known as billberries) collected in the Luboten mountains, some 140 kilometers from the capital Pristina, southern Kosovo, 03 September 2006. The Luboteni mountains have the highest peak in Kosovo, and the blueberries there (also known as bilberries) bare know for their quality. AFP PHOTO / ERMAL META (Photo credit should read Ermal Meta/AFP/Getty Images)

LUBOTEN, SERBIA AND MONTENEGRO: Two young ethnic Albanians collect blueberries on the Luboten mountain, southern Kosovo, 03 September 2006. The Luboteni mountains have the highest peak in Kosovo, and the blueberries there are know for their quality. Youth from neighbouring villages walk each day, nearly four hours in a row, to climb the hill and collect blueberries, and return home by sunset.AFP PHOTO / ERMAL META (Photo credit should read Ermal Meta/AFP/Getty Images)

WASHINGTON, : Hsing-Hsing, a giant panda, eats blueberry anniversary cake in his habitat at the National Zoo in Washington, 16 April. Today marked the 25th anniversary of the arrival of giant pandas to the zoo which were given as a gift of friendship by the people of China. AFP PHOTO Joyce NALTCHAYAN (Photo credit should read JOYCE NALTCHAYAN/AFP/Getty Images)

LUBOTEN, SERBIA AND MONTENEGRO: An ethnic Albanian, shows blueberries (also known as billberries) collected in the Luboten mountains, some 140 kilometers from the capital Pristina, southern Kosovo, 03 September 2006.AFP PHOTO / ERMAL META (Photo credit should read Ermal Meta/AFP/Getty Images)

Freshly harvested blueberries are pictured on June 28, 2009 on a farm in Klaistow, eastern Germany, where blueberries are cultvated on an area of 55 hectares. AFP PHOTO DDP/ MICHAEL URBAN GERMANY OUT (Photo credit should read MICHAEL URBAN/AFP/Getty Images)

Maltise, gets a blueberry facial from Valerie Durante at Downtown Doghouse pet salon and boutique on May 11, 2012 in the Chelsea section of New York. People and their pets often end up resembling each other, but image-obsessed Americans are taking that age-old relationship a step further, treating their four-legged friends to everything from spa facials to testicle implants. AFP PHOTO/Stan HONDA = MORE PHOTOS IN IMAGE FORUM = (Photo credit should read STAN HONDA/AFP/GettyImages)

OAKLAND, CA - JANUARY 1: Chef Alfredo Mora puts a blueberry muffin in a paper take out container at the Crepevine on January 1, 2007 in Oakland, California. In an effort to curb pollution, the city of Oakland on January 1, 2007 bans food establishments from using Styrofoam made take out containers. As an alternative, the city encourages food establishments to reduce use of plastic in favor of other materials that are biodegradable or can be composted. (Photo by David Paul Morris/Getty Images)

PHILADELPHIA - MARCH 22: Luis Rodriguez (L) has a blueberry Crazy Puff placed in his mouth by Michelle Rodriguez in the tasting area during the Snack Food Food Association's SNAXPO 2004 March 22, 2004 in Philadelphia, Pennsylvania. SNAXPO 2004 features the latest innovations in supplies and equipment as well as a snack tasting area to see and taste the latest trends in the snack industry. (Photo by William Thomas Cain/Getty Images)

CHARLES CITY, IA - MAY 25: Allison Cuccuini, 10, of Charles City, Iowa enjoys a slice of blueberry pie while waiting for the arrival of Democratic presidential candidate Senator Hillary Clinton (D-NY) before a meeting at the Lincoln Elementary School May 25, 2007 in Charles City, Iowa. Supporters of Clinton enjoyed coffee and pie before Clinton spoke and outlined her plan for the presidency, declaring she would spend a great deal of time campaigning in Iowa. (Photo by Mark Hirsch/Getty Images)

CHARLES CITY, IA - MAY 25: Jim Fencel of Charles City, Iowa enjoys a slice of blueberry pie while waiting for the arrival of Democratic presidential candidate Senator Hillary Clinton (D-NY) before a meeting at the Lincoln Elementary School May 25, 2007 in Charles City, Iowa. Supporters of Clinton enjoyed coffee and pie before Clinton spoke and outlined her plan for the presidency, declaring she would spend a great deal of time campaigning in Iowa. (Photo by Mark Hirsch/Getty Images)