My very large and healthy impatiens have suddenly been attacked by something. The stems appear to have been cut off, flowers are falling and dying.
What Is Wrong With My Impatiens
Certified GKH Gardening Expert
It could be cutworms. Neem oil should help. Here is more information that sohuld help you: https://www.gardeningknowhow.com/ornamental/flowers/impatiens/impatiens-problems.htm, https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm, https://www.gardeningknowhow.com/plant-problems/pests/insects/get-rid-cutworms.htm