What are the symptoms of calcium deficiency in flowers?

Growth point damage, serious growth point necrosis, showing "broken neck" symptoms; root tip and terminal bud growth will stagnate, young roots are abnormal, root atrophy, root tip necrosis, root hair distortion, some scale-like, and less root quantity; young leaves lose green, deformation, often hook shape, leaf shrinkage, leaf tip distortion, leaf edge curl, yellowing, serious when new leaves are difficult to pull out, or even adhere to each other; leaf edge is irregular dentate cracking, and necrotic spots appear.