South Africa

Hi there - I came across an earlier question re curling leaves on arum lilies - I have the same problem. These are new plants, situated against a brick wall with a sprinkler system. The leaves curl up, acquire a bluish colour and the leaves seem to rot from the base. They are in full morning sun and at this time of the year they are in shade from about 2pm. I'm in north-western Johannesburg. The rest of the plants in the same bed are very happy and the soil doesn't seem to be too wet. Any answers? Thanks.

• 14 Apr, 2017