Hi! Does anyone know what plant this is, and whether it's difficult to grow? They were about 6ft tall, around a lake, in the UK. Thanks! Jen
Phragmites australis (Common Reed). Very easy to grow in wet soil or water up to 20cm or so deep; simplest is to just transplant in a section of roots in the winter. If you want to read up on it, type 'reedbed creation' into google, you'll get lots of hits.
One thing to watch for - once it gets going, it can spread up to 4-5 metres per year by rhizomes. Keeping a reedbed small isn't easy! Great for wildlife, though.