My plumeria trees are outside in large pots, they are growing well enough each year and the flowers are coming more and more each year, my question is, why aren't the flowers fragrant? Is it fertilizer? I Was quite busy this past spring and didn't do that, is fertilizer key for fragrance?

@Dutchlady1, can you help this new member?

Beena5222
Almost all Plumeria species and varieties, with a few exceptions, are fragrant; is it possible for you to post a picture of your plants and flowers? Have you tried sniffing at different times of the day? Some fragrances are stronger in the evening, others in the early morning.
Fertilizer should not make a substantial difference in the scent of your blooms.