I’ve noticed that trees begin turning colour much later in autumn in recent years, and don’t begin to drop their leaves until late October or November. Our mulberry tree was always “last to come, first to go” but not in recent years; the apple trees are later too. Is this another aspect of the climate emergency? Has anyone else noticed this? Jill Bennett, St Albans, Herts Post your answers – and new questions – below or email them to nq@theguardian.com