Spring is flower festival time from coast to coast in the United States. Washington's Cherry Blossom Festival, April 6 to 12, will be just one of dozens of similar colorful events celebrating the beauty of the blossom, from Alabama's azaleas to California's camellias.

The primary draw of these festivals, of course, is the flowers themselves, although many also feature parades and exhibits, concerts and formal balls. But a few have planned special events to draw visitors: In Sacramento, Olympic gold medalists will give gymnastic exhibitions during a competition between local and regional athletes. Knoxville's 17-day celebration will be one of the first major events highlighting "Tennessee's Homecoming '86," a yearlong, statewide celebration. And Norfolk's 33rd annual tribute to its azaleas is also its annual salute to the North Atlantic Treaty Organization and will wind up with an air show.

Among the flower festivals around the country this year: Sacramento Camellia Festival, March 1-16, Sacramento, Calif.; for information, (916) 442-7673. Azalea Trail Festival, March 8-May 31, Mobile, Ala., (205) 433-6951. Macon Cherry Blossom Festival, March 16-23, Macon, Ga., (912) 744-7429. Atlanta Dogwood Festival, April 5-13, Atlanta, Ga., (404) 892-0539. Dogwood Arts Festival, April 11-27, Knoxville, Tenn., (615) 637-4561. International Azalea Festival, April 17-21, Norfolk, Va., (804) 622-2312. Washington State Apple Blossom Festival, April 24-May 4, Wenatchee, Wash., (509) 662-3616. Shenandoah Apple Blossom Festival, May 1-4, Winchester, Va. (703) 662-3863. Spokane Lilac Festival, May 8-18, Spokane, Wash., (509) 624-1393. Tulip Time Festival, May 14-17, Holland, Mich., (616) 396-4221. Lilac Festival, May 16-25, Rochester, N.Y., (716) 546-3070. Portland Rose Festival, May 30-June 15, Portland, Ore., (503) 227-2681.