Germination care Kiri seeds should be sown in late winter. The best method to get them to germinate is to allow light to reach the seeds while they are in a humid atmosphere. This is achieved by placing the seeds superficially on the germinator substrate and covering the container with transparent wrappings that allow light to pass through (such as plastic film). In this way, the water in the soil is conserved and the seedling that will come out of the seed is protected, after approximately two months. When the plant has finished germinating, the transparent wrap should be removed to acclimatize. The implantation to a new place must wait a week after this.
Trees of this species like places with direct sun exposure. They are not good competitors against taller plants and do not grow well in shady environments. They do not have strong nutritional requirements, although in rich soils their development can be accelerated. For its good growth, it is convenient for the soil to have good drainage capacity and to increase irrigation in summer to avoid dehydration, taking care not to create a puddled area where they are planted. In case of being transplanted to a place with predicted frosts, it is good to cover them in advance to avoid damaging the foliage.
Where to plant in the planisphere + Ideal Climate?
The best time to plant a paulownia tree depends to some extent on your location. If your area has warm winters without freezing temperatures, you can plant a young tree any time during its dormant period, from late fall through winter and into early spring. In areas that experience hard freezes during winter, it's best to plant a new tree in early spring; for example in late March or early April, when the soil can be worked but before the tree buds swell and turn green. Kiri can survive down to Zone 5 (may not flower), but thrives most favorably in Zones 7-10. Paulownia trees prefer a location that receives full sun, but they can tolerate partial shade, preferably in the afternoon in areas with hot summers. They also do well in urban locations where soil and air quality can be poor. Because of the tree's large leaves, it's best to choose a site protected from strong winds that could damage its foliage.
Due to their high growth rate, Kiri trees can be used as reducers of environmental CO 2 and biomass generators for the manufacture of bioethanol and cellulose. The leaves can accumulate a large proportion of nitrogen, so they can be used as natural manure or as fodder for livestock. Kiri wood was widely used in Chinese carpentry to make instruments, furniture, and other items. Due to their colonizing and anti-soil erosion abilities, they can be used to restore deforested or damaged areas. Its ornamental use in public and landscaped trees is also widely spread.