Q.kiwi vines not flowering
I am in Nassau County in Northeast Florida. I have two vines trained on an arbor about 6 feet tall and reasonably healthy as far as I can determine. Dark green foliage, some leaves do get brown edges, and some individual leaves have died off but, overall, the plants are well filled out and dark green in color. The vines are 3 years old but I have never observed any flowering on the vines. I was wondering if they need to mature a certain number of years before flowering? I water regularly and fertilize quarterly with 10-10-10 spikes. Any thoughts would be appreciated, Thank you

You need to have both a male and female plant for successful fruit production on Kiwi Vine.
These article have more information for you.
https://www.gardeningknowhow.com/edible/fruits/kiwi/sex-of-kiwi-plants.htm
https://www.gardeningknowhow.com/edible/fruits/kiwi/growing-hardy-kiwi-vine.htm
https://www.gardeningknowhow.com/edible/fruits/kiwi/no-fruit-on-kiwi-vine.htm