Kenneth W. Leonhardt |

Ornamental Crops

Research Specialties and Interests

▴ Developing improved varieties of ornamental plants for commercial producers

▴ Ornamental crops, with emphasis on Leucospermum (Pincushion) and landscape trees

Education

Ph.D.︱Horticulture, University of Hawaiʻi at Mānoa

M.Sc.︱Horticulture, University of Hawaiʻi at Mānoa

B.Sc.︱Horticulture, California State Polytechnic University, Pomona

Courses Taught

‣ TPSS 369 – Ornamental Plant Materials
‣ TPSS 430 – Nursery Management
‣ TPSS 492L – Internship Experience
‣ TPSS 695 – Masters Project

Membership and Service

American Society for Horticultural Science (ASHS)
International Society for Horticultural Science (ISHS)
International Protea Association (IPA)
Co-Editor, Journal of the Heliconia Society International

Selected Publications

Leonhardt, K.W. 2022. Breeding Leucospermum for Improved Horticultural Characteristics, Disease Tolerance and Cultivation in Tropical Climates. Acta Hort. 1347. ISBN. 978-94-62613-46-1. Link

Leonhardt, K.W. 2020a. Cultivar Improvement in Tropical Ornamentals, for Landscape Uses and Floral Products. Acta Hort.1288, 21-31. DOI:10.17660/ActaHort.2020.1288.4

Leonhardt, K.W. 2020b. A polyploid pink and white shower tree, Cassia javanica, produces diploid progeny. Acta Hort. 1282, 49-52. Link

Leonhardt, K.W. and M.G. Wright. 2020. Breeding Leucospermum hybrids for potted flowering plant production, landscape uses and for cutflower production in the tropics; genetic factors contributing to plant architecture. Acta Hort. 1282, 163-166. Link

Leonhardt KW, Shingaka P, Nakao P, Jewell T, Miguel T, Oka D.2005. New protea cultivars for Hawai‘i growers from the University of Hawai‘i protea research project — 1999 to 2004. Honolulu (HI): University of Hawaii. 28 p. (New Plants for Hawaii; NPH-11) PDF

Leonhardt, K.W. 2019. Polyploidy as a Management Strategy for Invasive Species. HortTech. 29(5):554-558. Link