Do not remove the foliage, as it needs to turn a straw color and die back before you can lift your tulip bulbs for saving. Once the foliage is spent, dig up your bulbs and shake off any excess soil.

So, what to do with tulips after flowering ... Once the foliage has died back, you can then carefully dig the bulbs up and out of the ground (discarding any diseased or damaged ones), and leaving ...