This tree has self seeded in my garden. It is one year old and is almost 6 feet tall. I haven't got a clue what it is. Can you help? The leaves are simple and opposite.
Salix caprea aka Goat Willow.
Not a good idea to let it establish close to a building or drains etc.
Re your PM. about salix caprea having alternate leaves whereas yours has opposite leaves .... in my
opinion it's a salix - one of the types like salix caprea, known as pussy willows - they do hybridise so that may be why the leaves don't fit the descriptions in the books.
Whichever it is, my warning about buildings and drains applies.