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Angående PlantFiles på amerikanska Daves Garden. Jag är medlem där och fick följande förklaring av bl a de som bidragit till faktan:
Now in regards to the hardiness in PlantFiles, for tropicals these are only general values and those are to be taken with a grain of salt . Most Hoyas are listed as Zone 11 which is 40°F and above, now while living in Zone 11 you may not ever have it go down to 40 but it could also go below occasionally for short periods of time in some areas.
Fick även ett mycket bra exempel från en odlare i Californien som har hoyor utomhus:
I have left a LOT of hoyas (mostly the carnosa varieties and pubicalyx) outside this last winter and the winter before, and they did fine. Temps at night woud routinely dip down into the lower 40s (sometimes even going down to the high 30s for a very brief period). HOWEVER, these temperatures did NOT last long. It is usually for just a couple of hours just before dawn that is the coldest, and then it starts back up again, and when the sun gets up it QUICKLY warms back up to the 50s and 60s (in the winter). You can look up what the usual winter temperatures are for Long Beach, California.
Where I have run into trouble is when it rains and then gets cold. Soaking wet plants can quickly rot in cold temps. However, the older bigger plants even do fine in those cases as long as the pots drain fast.
We usually do not get too many days in a row of rain either. Just a few here & there. Also, I water only lightly in the winter and wait until it warms up in the day.
Some seem to be a bit more touchy than others with these low night temps. For instance, I have lost a couple of lacunosas from letting them get wet during cold. But last winter I had one out all year under a shade thing with some cactus and sans (they can't get wet either), and that one did fine. Bella shuts down & looks bad all winter, but seems to make it though just fine come spring. My globulosa actually grew last winter and looked lush and pretty all the time. It seems to prefer it out there (looked bad in the house).
Another one that prefers it out there all winter is my serpens. Last year I got 2 flowers in the spring and this year it is just loaded with buds forming. I kept loosing them until I moved it outside in the cool. It only gets the very early morning sun too. It seems to really prefer the shade. Two little ones I have kept turning pale when I had them in a very light area with a bit of sun part time. Another that looks better in the cool is polyneura. It ALSO likes the shade, and did much better after I moved it to the North side of the house. However, I have never had a bloom on that one.
Along with most all the carnosas and pubicalyx, I left diversifolia, a bunch of austraulis various kinds, cumingiana, kentiana, shepherdii, pottsii, kerrii, obovata, and some others (can't think of all right now, and please excuse spelling errors as I am not taking time to look these up.)
Anyway, the point is....I KNOW for a fact that these can take low temps for BRIEF periods (a few hours) of time. Now...as far as all night long, or lower than upper 30s, I have no ideas.
Also, we are known to get an occational freeze here some years, and I have a plan in place to bring in or cover EVERYTHING should this occur ever. Fortunately....we were blessed with rather mild winter this year. Now that it is spring and warm nights (upper 50s) ....I am slowing moving out almost all my houseplants too.
Att svaren är på engelska får ni ta. Har inte tid att översätta det till er.
//Christina
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Vilka hoyor trivs i växthus på sommaren?
08-05-2006, 17:09
