Prairie, Ox Eye Sunflower
- Self-seeding and hardy to zone 4
- Plants grow to 2-5 feet tall
- Long-lasting yellow-orange flowers
- Blooms from June through September
(Heliopsis helianthoides) Produces huge quantities of brilliant yellow-orange flowers from June to September. Very easy to grow. Seeds are great for the birds! Excellent cut flower lasting up to 10 days. Grows 2-5' tall. Self-sows; does not spread by rhizomes. Hardy to zone 4.