Posted: 22/08/2015 at 18:23
It depends what you want Kay. I rarely dead head anything. I have a forest of assorted alliums. Some of the cultivars are not as huge in later generations but I prefer them like that. The speciee, especially christophii, seed like made and are just the same.
And as an extra, there are some pink ones (name escapes me for the moment) which have been seeding gently for years, looking much the same, this year there are 3 white ones