Depending on the citrus variety, foliage and fruit suffer damage at about 32 degrees F (lime) to 20 degrees F (kumquat), with mandarin, orange, grapefruit and lemon falling in between that range. Some citrus varieties can tolerate temperatures in the teens for a couple of hours. Determine hardiness from the nursery plant tag or catalog description.
Cold Protection
Citrus trees anywhere in Texas ultimately will be threatened by a severe freeze. Consequently, cold protection practices must be implemented to minimize the damage. The duration of freezing temperatures can be more critical than the minimum temperature, i.e., a brief drop to 24 degrees F may not cause as much damage as several hours at 26 degrees F. Moreover, exposure to cold weather increases the ability of citrus trees to withstand cold, as short days and cool weather condition the tree to stop growing and acquire greater cold-hardiness. For example, satsuma may withstand 18 degrees F in early February when it is completely dormant and most cold-hardy, but may be seriously damaged at 24 degrees F in early December
pod said:
Now on fertilizer? I'm lazy. I should fertilize everything more than I do but I'm always in a hurry and the plants need water and I don't think about it. I'd keep some mixed up but have kitties & dogs that follow me around and drink out of the plant water so try to be careful for them.
Perhaps you can help by reminding me when I need to!?!!