@Completerookie Sorry yes I think it is willow herb too. Think you have a sedum in the centre which needs full sun. Penstemons do not readily set seed. Did you plant penstemons here?
I have worked as a Gardener for 24 years. My latest garden is a new build garden on heavy clay.
Willowherbs I think. Penstemon leaves are more pointy (mine are anyway) and I've never had them self-seeding. Is there a penstemon plant already in there? If there is I'd expect the old stems to still be there.
Doncaster, South Yorkshire. Soil type: sandy, well-drained
@Completerookie Now is a great time to get the weeding done before they set seed. Your penstemon should soon be showing signs of life. It is woody at the base and you should see little shoots appearing.
I have worked as a Gardener for 24 years. My latest garden is a new build garden on heavy clay.
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In the sticks near Peterborough
In the sticks near Peterborough