Ipheion uniflorum

penstemon penstemon@Q.com
Mon, 23 Feb 2015 09:09:14 PST

>It has gone through -20 F here. We routinely get from  0F to -5 F every 
>winter (this one included).

>Why is it hardy? Either your Viking theory is true or “Nature is weird”.

0 to –5F? Practically Florida.

The first frost here—the first frost—was a drop from 17C to –25C in about 30 
hours, in November. With snow cover, though.
(Many conifers, cacti, supposedly-hardy agaves, etc., showed how unevolved 
they were; i.e., by dying or being severely damaged. There are actual 
scientific reasons for the failures of these plants, but that’s another 
story altogether.)

When the snow melted, which it did in a few days, bulbs whose foliage *never 
experiences temperatures like this in their native habitats* (ie, Crocus 
niveus), were unfazed.

Bob Nold
Denver, Colorado

who is going to plant all the seedlings of Levantine oncocyclus iris out in 
the garden, with no fear. 

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