Peripheralflowers losing, turgidity, and also developing necrosis. Results in brittle & curled leaves with pale green tips curling upwards.  Petals become quilled or will not open regularly. Branching of stem without flowering.  Also delay in flowering. 

Borax 3g/lit as foliar spray during flowering.  Borox 0.02 g/lit for 3-4 weeks alternately with irrigation corrects the deficiency.