12d65980_ening_Tips_and_Plants___How_to__Plant_Symptoms
[Deficiency] Calcium [Plant Uses] Cell wall manufacture and regulation, activates several enzymes [Sources] Limestone, ground clam and oyster lime shell, gypsum, wood ashes [Plant Symptoms] 
Leaves curled upward Leaves are scalloped Buds dried out or absent Buds drop off early while the stem is still stiff and erect Tomato blossom end rot Weak stems
Organic Gardening Tips and Plants - How to