From the tree’s point of view, autumn and winter are the best times to build a treehouse. Injuries are not so tragic here because the tree is not “in sap”, i.e., fewer nutrients and water pass through the vessels (due to cold, little foliage and less sunlight). Also, bird protection (nesting and brood protection) does not apply in the winter months, so this is also the peak season for arborists and forestry workers.
But let’s be honest, icicles, nutrients and birdies aside – we prefer to work topless at 30° in summer – for the species of treehouse builders, it’s high season all year round! Why? Because we are the most colourful birds of all!
PS: Don’t worry, even in high summer, a healthy tree can easily cope with the “treehouse intervention”!