JoeReal

Leaving them on will surely be ugly.

But here are the two major advantages of leaving them on:

1. Allows translocations of nutrient backs to the corms and or reallocate some of it to the pups as the leaves begin to die off.

2. Allows extra protection in terms of frost. The overhanging leaves create a blanket to protect the stem and soil from radiative heat loss, the most common causes of frost in marginal climates.


In practice I don't leave them on because they are very ugly to look at. But I wait until they turn brown before removing them. I just use other means of frost protections.