Answer: For juicing, the trees you've selected are good choices. Citrus flower buds begin to form in early winter and develop through late winter and spring. Most flowers don't result in the formation of fruit because more than 99% of them usually fall off. Because the number that do become fruit depends largely on temperature and moisture, adequate water is very important during and immediately after flowering.
Most pollination is done by insects, but due to a rather interesting process natural to some citrus called parthenocarpy, fruit can develop without pollination.
Q&A Library Searching Tips