I'm 90% sure this is Golden Heart, from Old House Gardens. 1955 origins, New Hampshire. It's also known as Aka 'Mary Poppins', semi-cactus, 6-7", 4-5'

I grew it for the first time this year. It bloomed in mid-July (given an early start, it's a blooming machine!) It is still blooming profusely in mid-October and looks like fire in the October setting sun.

More info about it:

TYPE semi-cactus
SUB TYPE cactus, semi-cactus, 4-5"
ZONES 3a-7b. (10bWC)
HEIGHT 4-5'
SOURCE Oregon, America
LIGHT full sun

Comparison both pics….
Sue's

Yours..


In my humble opinion it's a match..

See the caption (click to enlarge) from the photo I added, it's from Old House Gardens so not my photo.

Label for the sprouted plant was incorrect, on the plant page. It's not Nick Sr. It's Golden Heart. Thank you @bumplbea 😊

When I was disappointed it wasn't Nick Sr. - I no longer am. This one is amazing in the Fall, esp. with the golden light of autumn sun on it. ❤️🔥❤️

dnrevel Very nice dahlia for fall color , I bet it glows in the fall sunlight.
You have a beautiful dahlia collection.