Suja said:

Does anyone here have experience with butterfly bushes being too
prolific? Last year, I found a teeny little butterfly bush plant
growing a good 60 ft. away from the original plant was, in a front
flower bed, although the original was all the way around the back of the
house. Yesterday, I noticed two more baby plants, growing 10 or 15 ft.
away from the large plant, and at least 5 or 6 more growing in the
vicinity of the baby plant in the front bed. What is going on? Do
buddleias propagate themselves through seed? The likely parent plant is
Lochinch, BTW.

Buddleia spread themselves by seed.

Buddleia davidii has an entry in the Brooklyn Botanic Garden publication
_Invasive Plants: Weeds of the Global Garden_.

"Butterfly bush does not yet present a serious problem but is spreading rapidly"
according to the book.

It "has escaped from cultivation along the eastern seaboard from Pennsylvania to
North Caronlina, and along the West Coast in California, Oregon and Washington."

"It generally colonizes disturbed areas such as roadsides and riparian zones."
(That last bit may be what could eventually be very troublesome.)

"Other members of this genus (for example, B. madagascarensis, B. lindleyana,
and B. asiatica) have also shown strong invasive ability while others (such as
B. globosa) have not."

While we're on the subject, do Tricyrtis spread by seed?

One presumes it does, if it is able to set and ripen seed. My clump never
has. Usually we have a killing frost before it is able to.

--
Pat in Plymouth MI

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)