I have the following sundews which have been growing outside for the past two months:
D. binata 'Marston Dragon'
D. x eloisiana (D. rotundifolia x D. intermedia) (formerly known as D. x beleziana 'Nightmare')
Unidentified (I think it's also a D. spatulata, but it isn't labeled)
From what I've read, the D. binata and D. x eloisiana don't require dormancy but will go dormant if left outside in colder temperatures. The others definitely need to come inside for the winter.
1. Is that correct so far?
2. For those that can stay outside, is it better to leave them outside and let them go dormant or bring them inside?
3. Is a sunny south-facing windowsill sufficient to keep them alive through the winter, or will they need supplemental lighting?