We had started to plant Purple Sensation in the prairie last year among the crocosmia as this border is all foliage no flower until mid summer. The allium foliage can look a little messy after flowering which the crocosmia foliage will help to hide. I hadn't realised that the geum Blazing Sunset would flower so perpetually and this produced a pleasant clash of colours, à la Great Dixter. We didn't have enough to reach the end of the bed so they have been continued and bulked up a little. Hopefully they will bulk up themselves in a few years.
We have also planted allium caeruleum azureum in the cottage garden - a lovely clear blue compact head on a tallish stem (2 ft), from siberia so pretty robust and should clump up nicely.
In the cutting field, we have plenty of allium sphaerocephalon which continually increase in numbers but to the point of being useful as opposed to thuggish. Reaching a decent height of almost a metre, they flower for quite a while in midsummer and are very much on trend at the moment, fitting well with prairie style planting.
Finally, my favourite allium - roseum, the rosy garlic - a perfect size for a handtied bouquet, flowers forever (and lasts forever in a vase), with a sweet honey smell and the bees love it...perfect!
The origin of "know your onions"? Check it out here!
Purple Sensation in the prairie border.
Allium sphaerocephalon
Allium roseum
Purple Sensation