Perennial vegetables

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Are Cardoons perennial? I know you eat the stems after blanching them, do they re-grow from the stumps left?

I have plenty of seeds if you would like some.

Weed-Digga

Thank you for your kind offer Weed Digga, I have just googled them and they sound really lovely. I will decline though as my garden is not that big and they are quite invasive from what Ive read. ;)

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