Interestingly, January '17 we had a period of sudden freezes here in Houston TX after an extended period of temps in the 70's. Trees were not hardened off. Temps fell into the upper 20's precipitously. Different Citrus responded uniquely:
1 Meyer Lemons all froze on the tree and the tree is against the south side of the house. Tree suffered leaf burn but not much else. its a mature (+15 year) old tree. All crop was lost.
2. Moro blood orange and bloomsweet grapefruit, which are away from the house on the north side, were all fine except for some minor leaf burn. Fruit unaffected. Same with the ujukitsu orange.
3. 20+ year old Meiwa kumquat kicked all its leaves and it is in a protected area between my and the neighbors house.
4. My 2 satsumas were totally unaffected.
Brazos belle avocado that's grafted onto a volunteer hass avocado stump didn't even get leaf burn and it's next to the Meyer lemon.
That was pretty much our winter. Now I'm seeing a third flush of blooms on my Meyer lemon and it had never had more than one bloom flush before.
