Prairie Sun Rudbeckia Seeds. A.A.S. and Fleuroselect Winner 2003. Prized for its unique bicolour pattern and sturdy plant habit. Very large 12 cm (5″) flowers with light yellow tips on golden yellow petals that encircle a soft green centre. Free blooming plants reach 100 cm (3') garden height. A short lived perennial that should be treated like an annual in Canadian gardens.