Citrus trees in pots and outside expect temps 29 -34. What should I do
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Bring it in! It's tropical so it will not withstand the cold.
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you can put a sheet over them for the night, they should be ok,
Bring it in. If you cannot do that, cover the plants in some way. Also wrap the pots to keep the roots warm.
You can cover them with a fabric to protect them from the wind and chill.