yes, me too Hosta.
large trees have large roots and have no respect for boundaries. They will spread way beyond the canopy in some cases. They look like tree/shrub roots to me
some kind of euphorbia, E. peplus maybe. I think most gardeners class that as a weed
the top one is a willowherb, very pretty, I have some, food plant for the Elephant Hawkmoth caterpillar.
Most people class those as weeds.
The other looks like a potentilla, not one of the weedy ones.
I have 4 Sorbus aria, though not 'Lutescens' One is crispy, the rest are not. I've seen this before with trees at this time of year and so far they're all recovered.
I can't see how it would harm anything. You could tip it on soil rather than leaves then it definitely wouldn't. I wash up in the sink, no bowl, but then it goes to the septic tank so it's still available to plants in that area
I think I'd prune after it flowered. that gives time for plenty of greening up through the summer
Is there a large tree close by?