When do the leaves on trees start changing colour in Autumn?

[CAJ1]

Just trying to work out when exactly the leaves on trees start changing colour in the Autumn. Would it be as early as the first week in September?

[flicrat]

It depends on rain,drought etc and different trees turn at different times.

[annie0000]

also depends on the temperature and where in the country (or world!) you are - further north in the uk, the trees turn earlier.

[welshlibranr]

yes, depends where in the Uk you are!........but mostly about mid to late October in most places............

[hammerman]

It will also depend on day length and the type of plant it is as some change sooner than others regardless of other factors

[boxtops]

It used to be Sept/Oct, but this autumn round here, they didn't change until November. How the seasons move - I remember when I was a child, the trees were bare on Guy Fawkes' Day!

[CAJ1]

Thanks for your answers and sorry for the delay in replying! Most helpful as always :o)