During winter to mid Spring in my area, my Kniphofia sarmentosa actively grows and later makes its blooms, and my hummie visitors love them.
Then in summer to fall my tropical milkweed attracts, butterflies, and the hummers as well.
Editing to add some photos:
Hummie with Kniphofia sarmentosa - old photos March 2012
Hummie with tropical milkweed: summertime
