You may find they will drop out and become self sown ones, or birds might eat them. I usually dead head my crocosmia so the corm builds up more for next year.
though they do look pretty when frosted.

Me too.

Many thanks for the replies.

I've deadheaded both my varieties of Crocosmia,Shirley,and just taken a bit of length off the tall 'Lucifer ' ones,so all the rest of the foliage will die down naturally now.

Thanks Sandra, it's going to be a weekend task as today is so grey and damp down here . . . :o(

I can't believe your weather today,Shirley.its been wall to wall warm sunshine here,at 21 degrees? and very similar yesterday too. I do hope you get a better weekend ..x

Thanks Sandra, beautiful sunny day today so the Crocosmia seed heads are no more!