I noted the comment below about the native locations of the species in
California. And wonder if Mr. Edmundas Kondratas or any other member would like
to contribute moor information on that aspect. I.e. the specie name and the
natural weather conditions.
At all PCI can be well frost resistant and from other hand not. It depends
from which native locations species were used for hybridizing. Note the species
growing in lower part of Californian Mountains are not frost resistant, but
those from higher parts are good for growing even in zone 5.
Mr. Harold Peters and Mr. Edmundas are thinking along the lines of moisture
the difference it seems to me is the temperature difference in their respective
locations. I had thought the person possibly with the widest experience with the
subject though his customers was Mr. Joe Ghio but unfortunately he says, he is
unable to help.
I copy below a further comment from Seattle.
I, too, pot up my seed and leave it outside in the
weather. I think the
lowest temperature we've had this "winter" was perhaps
25 F, a couple of
nights, but it's been up to at least 40 F in the daytime. I
where the paralyzing snow was that you read about, but not in
the past month. Also, this winter hasn't been anywhere near as wet
last year; I think you're right, it's not good for them to get too wet.
Of my home seed, which I put outside in November, nothing has
yet---April 1 seems to be their preferred date. But did I tell you
some of LAST year's seed, potted and put out in November LAST year
left out), finally sprouted last month?
As to hardiness, I've
seen some foliage damage probably due to cold, but
don't think I've ever lost
a plant to it. I don't protect them at all.
In fact, several years ago I
went to the Northwest Flower and Garden SHow
here in early February---there
was lots of ice and snow that year, and
especially right then---and came home
all inspired, went out and looked
at my PCNs, and found an early-blooming
clump from Dora Sparrow's seed in
full bud and showing color--and frozen
stiff. No, the blooms didn't make
it, but the plant lives on.
Really can't shed any light on growing seed outside of here; sorry. Yes that
url is correct. Our page should be up any day now. jjg