Q.Flowering yucca plants…..are they safe outside if you have dogs?
I’m wanting to buy several of these plants, but not sure where to plant them.

Certified GKH Gardening Expert
According to the University of California, yucca plant is safe around pets and humans as far as ingesting plant parts.
Some varieties have sharp spikes so you may want to avoid those. Other than that, site your yuccas in full sun and dry areas.
Here is information on varieties of yucca:
https://www.gardeningknowhow.com/ornamental/foliage/yucca/yucca-plant-varieties.htm