After transplant to a new pot ( larger one ) the plant became very low ... Looks dry ... Leafes are directed downwards . but this was the most vigorously growing chrysanthemum in our garden
Certified GKH Gardening Expert
Hmm... what else has changed? Does this container have good drainage? If not I would suspect a rot problem. Let the soil dry just a little in between watering. If you suspect infection, you can add a little wettable sulfur to the soil to help with this.
This can happen if the roots get disturbed to much as well. Here is an article for the care of these plants:https://www.gardeningknowhow.com/ornamental/flowers/chrysanthemum/growing-mums-in-containers.htm