you could try cutting it right back, it's what Beth Chatto does with plants in her dry garden if they're stressed. I would go for cut back, water once, cross fingers
I leave mine as well. Plants, including bulbs and corms, belong in the ground
I can see a birch as a tree in a hedge, but I can't see it responding well to being cut as part of a hedge
looks like Alliaria petiolata, Jack by the Hedge. Supposed to taste of garlic, but no garlic I've eaten tastes like that.
No, that doesn't sound like Tutsan, they are individual small shrubs. The flowers aren't big enough for H. calycinum which does spread like that so I don't know what you've got there.
the most likely present from birds is Hypericum androsaemum, the native Tutsan.
When the plant drops its seed is the time to sow any hardy plant. Just sow and leave them alone.
I should think 3 or 4 years to flower,
I've just braved the mozzies and checked mine. They're almost black but not ripe. Except for the out papery bit, the whole thing is still green and damp
cannabis was common in birdseed until what seems like recent times to an oldie like me. A popular excuse when the cops came round