Calochortus notes
MARK MAZER AND FREDRIKA MAZER (Wed, 26 Jun 2013 11:27:51 PDT)

Nhu wrote,

I find that
Calochortus are very difficult to grow in Berkeley. Our winters are
just a bit too cold (-2 to -3C) for them and they get too wet. The
combination of cold and wet causes a lot of fungal disease.

It only took 7 years to kill the hundreds of Calochortus that we grew from
Ratko seed in the frostfree greenhouse in Connecticut. They hated being
potted in our too warm greenhouse here in North Carolina so they all went
out into a raised bed where we had several nice surprises the past few
years but not a single stem this year.

Mark Mazer
Hertford, North Carolina USDA 8