I can't seem to find any information for how much cold this one can take. Mine is starting to wilt a little, and we've only started to dip into the high 40's. My vine is very young and small and planted in the ground. Any info. is appreciated about this vine.
Hardiness of Passiflora Cincinnata
P. cincinnata - Pale mauve and deep mauve flowers up to 5 inches. July to August. Minimum temperature 55 degrees F. Vigorous.
http://www.ccnnwebdesign.com/garden/
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P. CINCINNATA - Fragrant frilly purple and maroon flowers in summer, dark green segmented leaves. 30°F.
http://www.kartuz.com/passifloras.html
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Some good sites listed here for lots of information
http://www.passiflora.org/links.htm
Thanks, Shirley. I actually did a web search before I posted, and I saw those sites, but I don't think they are correct. Mine was doing fine until it started to dip down into the 40's. It may be that mine is too small to weather this temp. I'm going to dig it up and keep it in my portable greenhouse for now. Thanks for your help.
Clare what should I do about my ruby? it is almost ready to open the last flower. Then it will be cold down as low as 28f. What can I do to save it ?My garage doesn't freeze, if I cut it and took it in would that save it ? Doesn't it need light?
Monterey, my P. alata "Ruby Glow" is starting to lose leaves also now that the temperatures are startingt to dip down into the 40's. It doesn't get much colder here than the high 30's. I have mine outside in the ground, and it does die back but not all the way. Yes, I would protect yours from any freezing temperatures. I'm not really a good person to ask about overwintering, but you could purchase a portable greenhouse and set it up outside and keep it heated, or you can bring your vines inside your house and put them by a sunny window. Yes, they need light unless they go dormant. Here's a link to the portable greenhouse that I bought: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=41334 It actually looks a little different than the item picture in the link and is much bigger than the dimensions which are given. Here is mine below:
I saw a link for Kartuz up above, and please don't get me wrong, he is a great friend of mine, but he is alway's asking me about hardiness and loses many of his plants due to them being left outside during winter, and not being hardy enough. He brings his in the greenhouse every year, and he left his outside 2 years ago and it died, so no, It will not survive down to 30 degrees, his low's hit right around the 32 mark every year, I know the area very very well. Anyhow, I wouldn't chance this vine much lower than the 45 mark, and not even sure how it will react at that temp. My vine from last year survived the winter in a very very small greenhouse, but lost all the leaves in the process. It probably got as low as 40 to 45 in there, I don't heat it at all.
Mark
Thanks, Mark. That was super helpful. I suspected as much. I did dig my P. cincinnata up and put it in my portable greenhouse, and it looks like it will survive. I better keep it in a container from now on so I can protect it from our temps. It does get lower than 45 here in the winter. I put one of those oil radiation heaters in my greenhouse, and it seems to be working great, and the passifloras seem to love the humidity. The only other Passiflora that is in there is P. marcrocarpa "Warmlands." All of my others are outside in the ground. Do you have any idea about the hardiness of P. helleri, P. serrato-digitata, or P. sprucei? So far they look okay, but winter isn't really even here yet. If you think they will not be able to handle temps in the 40's this winter, then I will dig them up and bring them into the greenhouse also. They seem to be currently putting on growth.