Gardenia leaves turing brown with yellow patches
Hello I have a Gardenia plant in a pot indoor, recently am seeing that their new leaves are turning yellowish with brown patches that develop into a brown leave and it fall. The gardenia is not flowering, I have been adding some coffee grounds and every 15 days am watering it with a gerdenia fertilizer rich in iron, the old leaves are normal.
please see the picture attached.
Your help is much appreciated.
Brown spots developing
new leaves affected
yellow patches with brown spots