What Makes Potato Leaves Yellow

Question

White potatoes

Answer 1

Many things can make them yellow. Unfortunately, your photos did not come through, so I am unable to see the location and nature of the yellowing.

Yellowing leaves can be caused by under/overwatering, pH imbalance, too much or too little of certain nutrients depending on location and appearance, too much humidity (sometimes dry air, even) and sometimes disease. Usually disease will appear brown or black, though.

The worst case scenario will be Mosaic Virus. In this case, the yellowing is strange and mottled. This is incurable.

Here are some articles that will help:

https://www.gardeningknowhow.com/edible/vegetables/potato/how-to-grow-potatoes-when-to-plant-potatoes.htm

https://www.gardeningknowhow.com/edible/vegetables/potato/potato-blight-diseases.htm

https://www.gardeningknowhow.com/edible/vegetables/potato/potatoes-mosaic-virus.htm