Hi...I have 2 questions......is the primrose deer proof and does it do well in the winter with cold to freezing temperatures?
Yellow Evening Primrose
Certified GKH Gardening Expert
These will do well in hardiness zones 7-9. If you are outside of these limits, then I would consider keeping them as inside plants.
As far as deer resistance... Even if it is deer resistant... I have learned, that deer will eat anything, unfortunately.
Here is an article on the primrose: https://www.gardeningknowhow.com/ornamental/flowers/primrose/growing-primrose-primrose-plants-in-your-garden.htm