How cold is it going to get tonight? All good outdoor orchid growers show be paying attention to the weather forecast. Know your plants. How low can each type go? Be careful. Many hard cane dendrobiums are the most sensitive....no lower than 60. Phals maybe down to 55. Most Vanda's can take 50 to 55, but 60 is real safe. Most cattleyas will be alright 45 to 50. Many nobile dendrobiums will take low 40's and some even to 35. The Callista section will be fine along with most encyclias as long as you do not let them frost.
BEWARE....these are only generalizations. Know your plant and know your environment.
Some ways to protect from the cold:
1. Blocking the wind with plastic.
2. Bringing plants into a garage
3. Running a sprinkler system to water the plants during the coldest part of the night......( I would only do this as a last resort)
How do you protect your plants?
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