Q.Yuccas
I planted a yucca three years ago. For the past two years, it has bloomed beautifully, but this year it did not bloom at all. What conditions or changes might cause this?

Certified GKH Gardening Expert
This article will help you:
https://www.gardeningknowhow.com/ornamental/foliage/yucca/yucca-plant-doesnt-bloom.htm
Some yucca species are believed to not bloom every year because blooming demands a large amount of energy:
https://aggie-horticulture.tamu.edu/ornamentals/nativeshrubs/yuccabaccat.htm