Libby McMillan

10Best (a division of USA TODAY)

As voting draws close to its conclusion, the 20 public gardens across America which are vying for the title of Best Public Garden in our 10Best Readers' Choice contest are pulling out all the stops for votes.

Garden lovers from Vancouver to Miami are rallying fans, friends and patrons to vote for their favorite, as are the gardens themselves.

Garden expert Cindy Brockway (a renowned landscape designer, lecturer, instructor and author) chose the 20 nominees in contention for the title. Vote for your favorite by noon on Monday, March 31 at 10best.com/awards/travel/best-public-garden/.

The 20 nominees are:

Bloedel Reserve - Bainbridge Island, Wash.

Brooklyn Botanic Garden - Brooklyn, N.Y.

Butchart Gardens - Victoria, B.C.

Callaway Gardens - Pine Mountain, Ga.

Cheekwood Botanical Garden - Nashville

Chicago Botanic Garden - Chicago

Coastal Maine Botanical Gardens - Boothbay, Maine

Denver Botanic Gardens - Denver

Desert Botanical Garden - Phoenix

Fairchild Tropical Botanic Garden - Miami

Franklin Park Conservatory - Columbus, Ohio

Huntington Botanical Gardens - Los Angeles

Lewis Ginter Botanical Garden - Richmond, Va.

Longwood Gardens - Kennett Square, Pa.

Missouri Botanical Garden - St. Louis

National Tropical Botanical Garden - Hawaii

Portland Japanese Garden - Portland, Ore.

Ruth Bancroft Garden - Walnut Creek, Calif.

United States Botanic Garden - Washington, D.C.

Wave Hill - Bronx, N.Y.