Factors Affecting Flowering of Asclepias spp

• Published in: HortScience Vol. 32; no. 3; p. 467
• Main Authors: Nordwig, G, Erwin, J.E
• Format: Journal Article
• Language: English
• Published: 01.06.1997
• ISSN: 0018-5345; 2327-9834
• DOI: 10.21273/HORTSCI.32.3.467A

Asclepias sp. seed were germinated and placed under different photoperiod treatments at constant 15, 20, or 25 ± 2°C. Photoperiod treatments were 8 hr, 8 hr plus night interruption lighting (2200–0200 hr, 2 μmol·m –2 ·s –1 from incandescent lamps), day extension lighting 1700–2000 HR (100 μmol·m –2 ·s –1 from highpressure sodium lamps), or daylight plus continuous light (100 μmol·m –2 ·s –1 light from high-pressure sodium lamps) treatments. Treatments were terminated at anthesis or after 15 weeks. Variation in plant habit and flowering were documented. Also, temperature/photoperiod effects/interactions on plant development are discussed. Lastly, species were classified into appropriate photoperiodic groups and evaluated for potential use as new floriculture crops.