However, successful propagation can be achieved with immature seeds, provided a large number are sown, or embryo rescue is employed Catkins should be placed in paper bags and dried as soon as possible. It is advisable to separate the seeds from the cotton and catkins if they are to be stored. Place the seed and cotton in the 16 gage sieve, cover with a fine mesh sieve, and use compressed air to agitate the seeds and force them through the mesh. Catch them on paper below. Storage Seeds should be placed at 4 degrees C as soon as possible in aerated tubes in a closed container with desiccant.
Good drainage is essential.
Controlled reproduction of Populus. Biology of Populus and its implications for management and conservation.