I have an almost identical experience with BM. I was lucky enough to
get a couple BM cuttings in last years F4F cutting. I managed to kill
them both, but they were the only cuttings I totally failed with last year.
So I bought a 1 gallon rooted BM cutting from a well known member on
Ebay last august. I immediately put it in a 5 gallon SIP and put it on
the porch in a partial sunlight position.
The plant was healthy looking, but did absolutely no growing at all last
fall. Fall is a big growth season for figs here in AZ and it was disheartening
to see the BM just sit there while all my other trees made good growth.
Maybe it was the climate change, as the BM came from back east.
The BM went dormant and lost all it's leaves in late December, along with
all my other figs. It honestly hadn't made even one new leaf since it arrived,
but it didn't look like it was suffering.
It is leafed out nicely now and making good progress. It is positioned in full sun now.
It still isn't a fast grower, but at least it's growing. Spring is the other growth
season here in AZ, so hopefully it will make good progress before the summer
furnace starts. I will probably reposition it into partial sunlight before summer
really heats up. It will almost certainly not need to be up potted from the current
5 gallon SIP this year unless it really takes off.
I also ordered and received BM again in this years F4F cutting. I learned my lesson
last go round about my incompetence rooting BM. 10 days ago I grafted both
BM cuttings onto a couple tissue culture Brown Turkeys. I bought the BT last
year for the purpose of root stock and they are currently in 1 gallons. So far,
the BM scions haven't broken bud but are greening up and swelling. It looks like
I could have both grafts take, knock on wood. It will be interesting to see how
BM grafted onto brown turkey roots progress. Supposedly the tissue culture
plants are virus free as well so they shouldn't contribute anything to the obvious
virus load of the BM cuttings.
I'll try and post pictures in a few weeks when/if the BM grafts are leafing out.