I recently planted 3 Duranta plants and they were doing well but now the flowers are gone and the leaves are turning a lighter
green and some are falling off! The third one ( in photo) is the best looking one.
Certified GKH Gardening Expert
It may be a watering issue, either too much or not enough. The soil should be kept moist but must drain well. A slow release fertilizer will keep it flowering till frost.