Woodland Trust

Nature's CalendarNature Detectives

Bluebells are just starting to flower

Silver birch. iStockphoto.combare tree

Completely bare except for shrivelled leaves

  • Use mature trees (30 years old or more), as young trees show different responses.

    Even trees of the same species, close to each other can behave very differently.

Record the trendsetters

  • If you are finding it difficult to decide when to record, wait until the event is occurring in three trees of the same species in close proximity to each other. Record the trendsetters rather than the extraordinary.

Leaf fall

  • Leaves may fall off before you have recorded any significant colour change. This may be the species or the weather conditions. Don’t worry! Just record when the tree is bare.