I received a large mum plant as a gift. I would like to plant it outside. When and how should I do that? Thank you.
Simply put them in the ground as deep as the pots they came in or transplant them into new pots. These plants need well-draining soil and sunshine. Water well after transplanting. For those outdoors, here is an article about overwintering them that you may find helpful: https://www.gardeningknowhow.com/ornamental/flowers/chrysanthemum/wintering-mums.htm