Assessment of the introduction and adaptability of ornamental Allium species in Nanjing region

This study investigated the introduction and adaptability of seven ornamental Allium species introduced from the Netherlands through field trials conducted in the Nanjing region.
The research systematically examined their phenological stages, growth parameters, morphological characteristics, and environmental adaptability.
The results indicated that ‘Ambassador’ giant allium (Allium giganteum ‘Ambassador’) exhibited excellent overall performance, with large and full inflorescences and strong adaptability, making it suitable for use in floral borders in Nanjing landscapes. ‘Kalata’ broadleaf allium (Allium karataviense ‘Kalata’) demonstrated distinctive foliage coloration and stable reblooming ability, supporting its potential as an under-canopy plant. ‘Summer Drummer’ allium (Allium ‘Summer Drummer’) showed high ornamental value with tall inflorescences and robust adaptability, making it a promising material for cut flower production.
Although ‘Fireworks’ allium (Allium ‘Fireworks’) has vibrant floral coloration, bulb degradation was observed, indicating a need for improved cultivation practices.
The traits of ‘Globemaster’ giant allium, ‘Mount Everest’ allium (Allium stipitatum ‘Mount Everest’), and ‘His Excellency’ allium (Allium macleanii ‘His Excellency’) remained unstable, requiring further acclimatization studies.
This research provides valuable insights for enriching spring bulbous flower landscape in Nanjing and across the middle and lower reaches of the Yangtze River.

II International Symposium on Botanical Gardens and Landscapes

H. Yang, Y.H. Gu, K.W. Liu

Allium, introduction, cultivation, adaptability, Nanjing

https://doi.org/10.17660/ActaHortic.2026.1455.9