Q. I am writing you in regards to a problem I'm having with my fruit trees in the spring when the winds are here. I have a tree that grows 5 kinds of citrus fruit; Pink Lemonade, Bearss Lime, and 3 varieties of oranges (Washington Navel, Honey Mandarin, and Valencia). I also have two other trees, a lemon and an orange, but do not know their variety. My problem is the winds in spring when they lose their blossoms which then causes them not to bear fruit. These trees are planted near the south wall in my backyard. How is it best to prevent the loss of the blossoms in the spring due to wind? How is this done in your orchard?
A. I do not believe that wind is blowing the flowers off of your trees. In order for that to happen, you would need it gale force winds. It is more likely that there was a dip in temperature causing a little bit of freezing damage.
All of these trees you mentioned cannot withstand cold temperatures. Just the slightest freezing temperatures will nip them and cause them not to flower or drop their flowers. The most cold tolerant in the group is probably the Pink Lemonade which is most likely Eureka lemon which may withstand 26° F. Just the slightest freezing temperatures will nip them and cause them not to flower or drop their flowers if nipped during flower formation.
All of these trees must be in a warm microclimate if they are to produce any fruit in the Las Vegas Valley. And even if you have a warm microclimate, the chances of production will be iffy due to late spring freezes.
The best advice I can give you is to provide some wind barrier to the area of the yard where they are planted. Wind combined with low temperatures can make freezing damage worse in the spring.