About
Porter's sunflower, also called Stone Mountain daisy, is an annual of thin soils on granite outcrops in the southeastern United States.
Care at a glance
- Pet safety
- Not recorded. We have no source on whether this plant is safe for cats, dogs or other pets — that is not the same as safe. Keep it out of reach until you have checked.
- People
- Not recorded.
- Light
- Full sun gives the most flowers; partial shade is tolerated. General guidance for the genus
- Propagation
- Seed or stem cuttings. General guidance for the genus
“General guidance for the genus” marks advice sourced for the genus as a whole rather than this species.
Field notes
Morphology
An annual up to about 1 m tall, usually bearing five or more heads, each with 7–8 yellow rays around 30 or more yellow disc florets.
Distribution & habitat
Alabama and Georgia on thin soils over granite and gneiss outcrops; introduced to North Carolina outcrops, where it can be aggressive.
History & etymology
Named by Asa Gray in 1849 as Rudbeckia porteri for Thomas Conrad Porter, who collected it in Georgia; moved to Helianthus by John Pruski in 1998.
Habitat
- Altitude
- Not recorded
- Altitude class
- —
- Native to
- United States
Cultivation
- Difficulty
- Not recorded
Text adapted from Wikipedia, CC BY-SA 4.0.
Crossed H. porteri with another species?Register the cross. If it's not documented yet you'll be the first contributor; if someone already registered it, you'll be taken there to add your photo.