when do you divide crocosmia? Home › Forums › Flower-Garden Questions › Bulbs › when do you divide crocosmia? This topic contains 1 reply, has 2 voices, and was last updated by Anonymous 6 years, 7 months ago. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts September 9, 2010 at 8:09 pm #29095 Anonymous My patches of crocosmia are getting over crowded. Are they best divided now or in spring? I’ve never had the luxury of too many before but they have really spread and I have lots of friends who want divisions. Thanks. Michelle September 15, 2010 at 1:07 am #29584 Anonymous You can divide them in the spring before the new growth appears. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic.