Hydrangea Bloom Deformity: Outer Flowers Only

Diagnosing Incomplete Flower Heads

A hydrangea with developed outer florets but a compact, undeveloped center may have a physiological or environmental issue. More information needed:

• Age of shrub?
• First occurrence?
• What happens as bloom ages?

Possible causes: late freeze damaging center buds, nutrient imbalance, or cultivar trait. Provide details for specific diagnosis.