Q.Regarding Planting Fall Mum’s From Pots.
I know I should cut back the plants to about 4″ stalks when the flowers are killed by the cold. When planting, it says the plant should be covered with maybe 4″ of mulch to protect it. My question is when removing the mums from their pots to plant them, (BEFORE putting the 4″ of mulch on top), how deep does the plant go? In other words, should the TOP of the cut off stalks be sticking up 4″ above the existing yard ground level, or should the TOP of those stalks be AT ground level? Put differently, before applying the 4″ of mulch, is the level of the top of the soil in the pot the same level as the yard surface, or 4″ BELOW the level of the yard surface? Thanks!!!!!!

Certified GKH Gardening Expert
You will want to plant them at the same level they were planted before. Then cut them to about 3 or 4 inches above ground level. Then you can mulch for protection.
https://www.gardeningknowhow.com/ornamental/flowers/chrysanthemum/wintering-mums.htm