Larches bring new growth in about beginning of April in my region. Then after two weeks they will have the long shoots on many places. These I cut off four weeks later at the top and leave them at the bottom to strengthen the lower region of the tree. If the tree is very healthy (with my feeding and watering the are!) it will have a second flush of long shoots by end of June. This I leave on for three weeks or so and then cut it at the top and leave it at the bottom again. Then, at about the beginning of September or much later I will cut back everything. Only then will my larches look good again. But this is how they are developed well.