Q.planting mums outside
I just bought a Mum from the Walmart garden store. It has purple and yellow flowers—small. Can I plant it outside in a barrel now? I live in southwest Idaho.
Yes, you can go ahead and plant your outdoor autumn planters.
Generally the plants sold at this time of year are a hardy mum cultivator.
With proper care it can be wintered over, but many grow them as a annual fall plant.
Here is a few links with more information.
https://www.gardeningknowhow.com/ornamental/flowers/chrysanthemum/growing-chrysanthemum-flowers.htm
https://www.gardeningknowhow.com/ornamental/flowers/chrysanthemum/wintering-mums.htm
https://www.gardeningknowhow.com/ornamental/flowers/chrysanthemum/fertilizing-mums.htm