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Mike wrote:
Would direct sunlight still be dangerous to the orchid at this time of the year? The sun is lower and lower in the sky as winter approaches. So would the sunlight shining directly on the orchid still harm it at this time, in the winter, and early spring? Yes, it could be. Practically, it probably wouldn't be unless there were a drastic change in light levels over a short time. Orchids (most plants, in fact) adapt to changes in light intensity by changing the pigment levels in the leaves, like getting a tan. So, the leaves may turn lighter green, perhaps even red or slightly yellowed, in high light, and back to deeper green in lower light. Watch the plant, and be prepared to move it back from the window a few inches if it starts to get too yellow. So, if you have a big deciduous tree outside your south window, and the leaves fall off on a windy day in early november, your plant might get burnt. While the sun may have been lower in the sky over a period of time, the leaves were blocking the full intensity of the sun, and when they are gone so is your plant. Without the tree and the leaves, the orchid may have adapted to the gradually increasing light levels, even (perhaps) to tolerating a few hours of direct sunlight. Anyway, it is the drastic changes that get you. Like when my wife put several flats of seedlings outside for a few minutes to clean underneath them. Each and every one burned to a crisp in less than 15 minutes. But I had plants of the same genus living outside at the same time. Me, I get sun burned if I look at a picture of the sun, much less spend any time outdoors... Rob -- Rob's Rules: http://www.msu.edu/~halgren 1) There is always room for one more orchid 2) There is always room for two more orchids 2a. See rule 1 3) When one has insufficient credit to purchase more orchids, obtain more credit LittlefrogFarm is open - e-mail me for a list ) |
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