Keep these tips in mind while shopping for your fall mums. Credit: Johnrob / Getty ImagesKey TakeawaysHardy mums are best for outdoor use due to their cold tolerance, while florist mums are better suited for indoor decor.Choose mums with mostly closed buds for longer bloom periods or mostly open flowers for immediate impact.Look for healthy, well-watered plants and check for even growth and any pests or diseases before purchasing.Whether you pla…