I don't know. Lets see what they do, if you don't find out what they are. Looks like you have a nice raised bed to work with this summer. Keep us posted and Welcome to the forum.
These are the basal leaves of some member of the Buttercup Family (Ranunculaceae), most like either a Winter Aconite (Eranthis) or a Monkshood (Aconitum).
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