What temps do you cover your citrus trees at?

I would not cover them.

In ground or containers? Age of trees?

Satsumas can tolerate temperatures into the mid-20s with no protection. Meyer lemons high 20’s - they are a hybrid of satsuma & lemon so more cold hardy than traditional lemons. Older, larger tree are more cold tolerant than younger trees, and in-ground trees have better cold tolerance than citrus trees in containers.

I can’t post the article as it’s not on-line, but here are excerpts verbatim from the article “When and How to Protect Citrus from Winter’s Cold” by Dan Gill, consumer horticulturist emeritus, LSU AgCenter.

“) The type and age of the citrus. Satsumas are the most cold hardy of the commonly grown citrus species in Louisiana. Kumquats follow with just a slight less amount of cold hardiness. In order from most cold hardy to least cold hardy: satsuma, kumquat, orange, grapefruit, lemon and lime.

A citrus tree increases in hardiness as it gets older. Trees with larger, denser canopies deal with the cold better as they trap more heat.

2) Threshold temperatures are approximately 20 degrees for satsumas and kumquats, and about 26 degrees for all other citrus.

3) The duration of the sub-freezing temperature is very significant. If the temperature is below freezing for 24 to 36 hours, damage can usually be expected.”

They should be fine. My tomatoes and pumpkins? Probably not.

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Meyer lemons high 20’s - they are a hybrid of satsuma & lemon so more cold hardy than traditional lemons.

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Wait, wtf!?!

Never read up on meyer lemons, but I just figured it was a specific kind of lemon.

Very interesting...

quote:

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Wait, wtf!?! Never read up on meyer lemons, but I just figured it was a specific kind of lemon. Very interesting...

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Improved Meyer Lemon