Alocasia Turning Brown

I have an Alocasia plant with a problem. Or perhaps I have a problem? The leaves open looking healthy and nice dark green. Then as they grow they develop brown dry spots. It is located in an area with lots of light but not direct hot sun. I water it regularly , maybe too often? I hope I can save it !

Hi Deanna,

Brown edges on alocasia plant leaf

Brown edges on alocasia plant leaf

My first thought is that the problem is being caused by too much plant food, too many chemicals in your water, or using water that has passed through a water softener and has too much salt in it. If it were a disease or Plant PestLearn how to identify and treat the plant pest called Whitefly at the marks would be all over the leaf and not just on the edges.

You should fertilize an Alocasia Plant every two weeks from late March through September with a basic houseplant food at 1/2 the recommended strength. Never fertilize during the winter. Too much fertilizer causes salts to build up in the soil and burn the leaves.

If your household water has a great deal of chlorine or fluorine in it, allow it to sit out overnight before using it so the chemicals can dissipate.

Never water your plants with water that has passed through a softener, it is much too salty.

I suggest you rinse the soil really well with distilled water the next time it’s time to water the plant. Hopefully that will get rid of any salt or chemical buildup in the soil. Avoid fertilizing for about a month. After that, only feed the plant when it is actively producing new growth. Too much plant food is often worse than not enough.

These plants are considered poisonous and should be kept away from pets and children. Read more about common houseplants that are poisonous in Don’t Feed Me To Your Cat! A Guide to Poisonous Houseplants