Primrose tip over

Well more rain tonight. The micro-basins held well. The fourth basin only filled up half way. The primrose really took a beating. They are about 4 1/2 feet tall right now, bent to get more sun and beginning to bloom. The heavy downpour just knocked them over -- way over. I've staked them up as best as I could, but they may need to be cut back. Bottom line, they need to be in full sun surrounded by plants that can help support their excessive height.