110f4388_rition___AskMax_CountryMax_com__Function
[Primary Nutrients] Phosporus [Deficiency Symptoms] Smaller yields of seeds & fruit; purplish leaves, stems & branches; [*Solutions] Rock Phosphate, Bone Meal, Single Super Phosphate, Triple Super Phosphate [Function] 
Root development & flowering
Plant Nutrition - AskMax.CountryMax.com
Function