Q.Why Has My New Lobelia Queen Victoria Gone Limp?
Bought a few days ago and still in the original pot. Has not been let dry out and is not waterlogged. Buds started to open and then the plant went limp. I have propped up and given a feed but no change.
Certified GKH Gardening Expert
Try more water. Lobelia is a bog plant and needs moist soil. If it's in a pot, it likely needs water everyday. It also should be in full sun in cool areas to part shade in warmer climates.
https://www.uaex.edu/yard-garden/resource-library/plant-week/cardinal-flower-9-25-09.aspx
https://www.gardeningknowhow.com/ornamental/flowers/cardinal-flower/growing-cardinal-flowers.htm