Of course I have never tried mowing them, so can not speak from experience. I think the bulbs will survive, and would expect them to continue growing this year at least the foliage. They should be back to normal next year. Al

Thank you for the reassurance, Al. I will leave them and hope to see them bloom next year.

They will survive but may not flower next year. By cutting off the leaves, the tulip's ability to store enough sugars and form a flower embryo for next spring has been handicapped.