Based on its origin and relatives, it can be assumed that it should store well in the 35F area. However, research results to confirm this have not yet been located.
Tidbits:
The genus Lobelia includes a very diverse range of plants from trees to herbaceous perennials to small annuals.
Recent Research Findings:
Using ‘Compliment Scarlet’, Gast (1997) showed that vaselife ranged from 8-14 days with water only being the least and flower food + STS or flower food being the best.