Ahead of the rest: Alliums make for useful exclamation marks among herbaceous plants

The enormous heads of Allium schubertii, at least 25cm across, are still standing in the garden, though they flowered in June. This is one of the great advantages of this particular allium: the seedheads last a phenomenally long time. The soft greyish-mauve sphere gradually bleaches to the colour of corn, but is just as eye-catching at this stage as it is earlier on.






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