I normally don't grow celery but started some from seed this year. Overall it was really healthy with very gigantic stalks. On harvesting I'm finding some of the plants have hollow stalks. Any clue as to why?
Certified GKH Gardening Expert
The hollow stalks could be an indication of insufficient nutrients and water.
Celery needs regular fertilization and the addition of compost is beneficial. It is also shallow rooted and requires regular watering. Here is growing information: https://www.gardeningknowhow.com/edible/vegetables/celery/tips-on-how-to-grow-celery.htm