sikokianum

[McClements, Jim]

Jean

Sounds like a typical arisaema "false pregnancy", in which case the stem
holding the fruit will at some point wither and collapse. If not, it's
probably going to be difficult to get the fruit to the point where the seeds
will be viable, since A. sikokianum is VERY slow to do so. My plants flower
in early April, and I usually end up harvesting the fruit in November after
the stalk is destroyed by frost. Even though the berries are still green at
that point, they turn red in a week or two and the seeds are fertile.

If over the next few weeks the berries seem to be enlarging, your best chance
to get seeds might be to try transplanting into a  pot (or is it already in
one?) and growing it on indoors. I don't think that you'd do the plant any
permanent harm by doing so.

If the seeds don't develop, I don't see any reason to bring the plant in. As
has been pointed out recently, the species seems to be perfectly hardy in
Minneapolis.

Jim McClements