Aspen is a deciduous, fast-growing tree with soft wood, belonging to the poplar genus. Aspen, or common aspen, or
Poplar quaking is a species of deciduous trees from the Poplar genus of the Willow family. The aspen blooms before the leaves appear, so the collection of leaves is carried out in early May or in June. The leaves are dried in the shade, and the raw material can also be dried in a dryer at a temperature of about 60 degrees. Aspen buds must be collected before they bloom. The speed of drying after harvesting is also important (kidneys are dried fastest in the oven or oven). The bark is collected not only from young aspen trees, 7–8 cm thick, but also from thin branches, approximately from April 20 to June 1, during the period when the sap begins to flow. The collected bark, cut into pieces 3–4 cm long, is dried under a canopy or in an oven or oven (at a temperature of no higher than 60 degrees). If the raw material is dried indoors, it must be well ventilated. Do not dry aspen bark in the sun. The storage period of the prepared raw materials is no more than 3 years.