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The Royal palm is native to the Everglades of south Florida. Royal Palms are found planted through out the Middle East, where summer temperatures can reach 55 degree C and humidity levels up to 95% - although many of them suffer from fungal infections in these circumstances if the stem is damaged in any way. Lower temperature range I can't help with, except to say that they are able to tolerate temperatures down to about 13 or 14 degrees C

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14y ago

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