I too have coffee plants that have never fruited. I was told I my kids would see them fruit before I do.

Blooming in a coffee tree is initiated by the slightly cooler and dryer conditions of the winter in coffee growing areas. they need fed a 22-5-20 fertilizer with supplemental magnesium (epsom salts) twice a tear. At 3-4 feet they need about two heaping tbs fert 3 times a year. Re-pot every year to a bigger pot till they reach your t'hold of pain. CTAHR/UH website has some great info if you want to grow coffee. Foliar analysis is WORTH it!

Oops, forgot to mention the above plant is 32 months old, N. alabama. they live in a greenhouse for winter and outside in shade protected from wind during summer.

WOW! Your coffee plants seems to be growing very healthy.