I live in Chicago and am interested in topiary. I looked up possible plants and one of the ones I read was good for topiary was rosemary.
https://www.gardenia.net/plant/rosmarinus-officinalis-rosemary
When I looked up the requirements for growing it however, it says I am in approximately Hardiness 6 and Heat Zone 6, which doesn't match the requirements for rosemary.
However, I'm confused if these requirements are for indoor or outdoor planting. Obviously, in my apartment, it's 75 degrees year round. So would I consider inside my apartment to be a different hardiness zone and heat zone? Or is that considered 6a and 6 too?