Perennial Plant Association selected Geranium ‘Rozanne’ as its 2008 Perennial Plant of the Year. Plantsman Adrian Bloom called it “the geranium of the millennium.”
The plant produces 2 1/2-inch, saucer-shaped, violet-blue flowers with white centers from early summer until frost. Plants reach 20 inches tall and 24 inches wide and have a mounding habit with slightly marbled, deep-green leaves.
Plants do best in sun to partial shade. It is hardy in USDA Hardiness Zones 5-8.
‘Rozanne’ is a naturally occurring hybrid discovered by nursery professionals Donald and Rozanne Waterer in their garden in
It has received high scores in university field trials throughout
{sidebar id=1}
For more: Perennial Plant Association, 3383 Schirtzinger Road, Hilliard, OH 43026; (614) 771-8431; fax (614) 876-5238; www.perennialplant.org. Blooms of Bressingham,
Latest from Greenhouse Management
- Voting now open for the National Garden Bureau's 2026 Green Thumb Award Winners
- WUR extends Gerben Messelink’s professorship in biological pest control in partnership with Biobest and Interpolis
- Lights, CO2, GROW!
- Leading the next generation
- The Growth Industry Episode 8: From NFL guard to expert gardener with Chuck Hutchison
- The biggest greenhouse headlines of 2025
- Theresa Specht
- 10 building blocks of plant health