University of Hawaii at Manoa

What you'll study

The PhD programme combines advanced coursework, supervised laboratory and field research, seminars and a substantial original dissertation. Students tailor study plans with a major professor and advisory committee; typical coursework areas include plant systematics and phylogenetics, evolutionary biology, plant physiology, molecular and genomic methods, ecology and population biology, conservation biology, and biogeography. Core training emphasises quantitative skills such as experimental design, statistics, bioinformatics and phylogenetic analysis, plus professional development in scientific communication and grant writing.

Practical components often include extensive fieldwork across Hawaiian and Pacific island ecosystems and laboratory work in areas such as molecular ecology, functional morphology, reproductive biology and conservation genetics. Formal requirements typically comprise graduate seminars, credit-bearing coursework, passage of qualifying/comprehensive examinations or an oral defence of the dissertation proposal, and final dissertation defence. Students may also participate in collaborative projects with local conservation agencies, botanical gardens and museums.

Entry requirements

Applicants are normally expected to hold a relevant bachelor’s degree with strong preparation in the biological sciences; many successful applicants hold a master’s degree in botany, plant biology, ecology or a closely related discipline. Typical expectations include a record of academic achievement, demonstrated research experience (for example through a prior thesis, publications or substantial field/lab work), and a clear research interest that aligns with faculty expertise.

Application materials usually include transcripts, a statement of research interests or proposal, curriculum vitae, and letters of recommendation from academic or research supervisors. International applicants must demonstrate English proficiency in accordance with university policy. Because admission is closely tied to faculty supervision, applicants are encouraged to contact potential supervisors before applying to discuss mutual research interests.

Career prospects

Graduates pursue careers in academic research and teaching, working as postdoctoral researchers or university faculty; many find positions in government and non‑government environmental agencies focused on conservation, endangered species recovery, invasive species management and ecological restoration. Other common pathways include roles in botanical gardens and arboreta, natural history museums, environmental consulting, conservation genetics laboratories, and applied research in biotechnology and forestry.

Alumni also work for regional and international conservation organisations, policy and management bodies dealing with island and tropical ecosystems, and as science communicators or educators. The programme’s combination of field, laboratory and analytical training provides versatile skills applicable to both basic and applied plant science careers.

Why study at University of Hawaii at Manoa

The University of Hawaiʻi at Mānoa offers distinctive advantages for plant biology centred on its location and institutional resources. Hawaiʻi’s highly endemic flora and a range of island ecosystems provide unparalleled opportunities for field-based research in evolution, speciation, ecology and conservation. The programme benefits from close links with local research and conservation institutions, including Lyon Arboretum and regional museums and restoration projects, allowing students to work directly on native plant conservation challenges.

Faculty in the department bring complementary strengths across molecular biology, systematics, ecology and conservation, and students often engage in interdisciplinary projects with neighbouring institutes. Support for fieldwork throughout the Hawaiian Islands and the broader Pacific, combined with access to specialised laboratory facilities and training in modern analytical approaches, makes the programme particularly well suited to scholars interested in tropical, island and conservation plant biology.