Growth, Flowering, and Survival of Black-eyed Susan from Different Regional Seed Sources

• DOI: 10.21273/horttech.11.1.26
• Publication Date: 2018-12-14T15:14:04Z
• Authors: Jeffrey G. Norcini; James H. Aldrich; Mack Thetford; Kimberly A. Klock...; Michelle L. Bell; Brent K. Harbaugh
• Keywords: Growing season

Growth, flowering, and survival of black-eyed susan ( Rudbeckia hirta L.) from three seed sources—northern Florida (NFL), central (CFL), Texas (TEX)—were evaluated under low input conditions for one growing season at four sites in Florida. Two were American Horticultural Society (AHS) Heat Zone 9 while the other two AHS Zones 10 11. onset date number flowers peak flowering varied by site. With few exceptions, plants tended to reach about same time. Flower diameter source with TEX>NFL>CFL. While TEX perceived as showiest, NFL CFL persisted longer Florida, hence provided some evidence adaptation regional site conditions.