Answer #1 ·
Josh Hersey's Answer · Hey Melinda, Great question they should defiantly be perennial for you. U. S. Department of Agriculture says hardiness is zone 2 thru 8. From personal experience make sure the stay in very moist soil or they will wilt. If you have them in containers or pots Check the pot often because primulas use a lot of water. Leaves and flowers wilt when the pot is too dry. Most species can handle a short freeze. Most primroses prefer cool, humid environments. Lastly, yes deadhead the flowers to encourage new growth.
You can also search Gardenality keyword primrose and there are many different varieties find yours and there is information to soak in.)