This grower is fairly sure of this plant identification.
These sucker freely and I've got loads of them so if you need more just ask. Very pretty in spring, and happy in shade or sun - they're very flattering to other plants, especially anything blue or purple. Mine look great right now with periwinkle and centranthus ruber (almost in flower.)
Pick up only please unless you're very close by!
Euphorbia amygdaloides (Wood spurge). This is an upright perennial which will grow to 1m high and has dark green, spoon-shaped leaves 8cm long, The flowerheads are yellowish green bracts in mid-spring to early summer.
Watch out it is poisonous and allergenic.
Borders, under shrubs,
Italics = data drawn from parent genus or speciesView Full Plant Finder Record