It's known that S.purpurea ssp purpurea is absolute winterresistant
(-30 C). But for the other there is no exact informations. In most
books you can find the information that the temperature must stay
over 0 C.
I live in germany and have a small artificial bog in my garden.
The avarage statistic january temperature is 0 C
The min. temperature of the ground in 5cm is 0 C
This year I put a two year old S.purpurea ssp venosa in my bog.
For since X-mas the max.temperatue was less than 0 C ,the lowest
temperature was -10 C. But the plant is still locking fine!
Has enybody experience with s.flava, s.rubra or darlingtnonia in this
conditions?
Has enybody experence with heating an artifical bog?
Regards
Cyrille