![]() You’ll have one tree that’s almost bare and one that’s barely turned colour, so t he advice that we give is to try and find three trees that are all carrying out the same particular event, so they’re all tinting at the same time. People that record Nature’ s Calendar say that they find autumn tinting particularly hard to record because often even the same species of tree can appear to be doing different things. B ut the yellow certainly is there all year round so it’s quite an interesting story when you’re out for your ne xt crispy winter walk just to enjoy all those colou rs and understand why they are where they are. T hat is created in certain weather conditions where you get a concentration of sugars in the leaf, particularly the red colouratio n. Some of the red colour, that’s actually not there all year. S o, it’s not a question of the colour appearing, it’s that it’s been there all year-round. I n fact, many of them are present in the leaf all year round and what happens is that the green pigment called chlorophyll, that slowly gets broken down as the cold weather increases and the colours that have been present in the year like the yellows are then revealed. N ot everyone might be aware about why leaves actually do change colo u r, and the yellows, the oranges, the beautiful shades that we see. S o, if it’s very windy, if it’s very frosty, then the tree might drop its leaves without having achieved full colouration. We don’t always see full tint every year because in some years, in some weather conditions, the tree might actually shed its leaves beforehand. Full tinting can be very variable : c an be from the end of September right through to November, maybe even early December in some years. And that’s actually quite an unusual thing. Actually, that colour doesn't matter, it's the fact that there’s really no green left on the tree at all. ![]() Kate Lewthwaite: F ull tinting is when the tree has completely changed colo u r, so there's almost no green visible and it's gone to its autumn colours which might be yellow, might be red, might be bronze.
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