What causes hollow heart in potatoes?

Online Answer
Hollow heart is an internal disorder where a 'lens' or 'star'-shaped cavity forms in the tuber. It appears to be caused by an abrupt change in tuber growth rate which usually occurs after a period of stress. Water, heat stress and associated calcium deficiency appear to have a role in the development of hollow heart.
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A: "Hollow heart" in potatoes is caused by environmental conditions, usually fluctuations in the amount of moisture the plants get while the tubers grow. ... The good news is that potatoes with brown center and hollow heart are still safe to eat..
Hollow heart is an internal disorder where a 'lens' or 'star'-shaped cavity forms in the tuber. It appears to be caused by an abrupt change in tuber growth rate which usually occurs after a period of stress. Water, heat stress and associated calcium deficiency appear to have a role in the development of hollow heart.
The good news is that potatoes with brown center and hollow heart are still safe to eat. If you mash them, no one will ever know they weren't perfect..