45+ Geranium Leaves Turning Yellow And Brown. The leaves also have brown spots. Both alternaria and cercospora leaf spots cause leaf discolouration and health problems for the geranium plant.
There are 3 plants sharing the one container and the reservoir holds 9 litres of feed. Older, lower leaves turn yellow and fall as new leaves and shoots are produced in warm weather. You can help prevent the spread of the disease by clipping off and destroying affected flowers and leaves.
One of the things that can cause plant leaves to turn yellow is that the plant's roots aren't getting enough water.
• sterilize your gardening tools to avoid spreading any pests or diseases that might be. Most likely because they need more water than you're giving them or are out in the sun too much. Table of contents the causes of yellow leaves on geraniums coming indoors 00:45 eschew extremes 01:48 bad actors 02:46 need to feed 03:21 plant leaf drying and brown at tips and edges: The leaves also have brown spots.