u/Distinct_Couple_5647

I am a first time coleus grower and I love the variety of this plant. I decided this year to plant coleus in an attached flower box for in front of my house. It been a few months stance the wee first planted and they were no larger than about 8 inches. They have done really well with some getting up to 3 feet tall but I am running into a major issue that is hitting the am at the same time. In the past week they seem to all be breaking or snapping or just lifting right out of the soil. They look so healthy otherwise. So am I missing something? Should I be doing something to keep this from happening? Please someone help me save them.