Paulownia Propagation Methods

Propagation via seeds

Advantages: The roots are better developed in seedlings than those propagated by root or stem cuttings. The plants grow stronger, faster and are hardly affected by heartwood-rot. Seeds are available in large quantities and cheap. Can be delivered on demand in large quantity during one-two months.

Disadvantages: Seed propagation will result in more variability. Each seed is genetically individual, so plants grown from seed are not as uniform as those grown from cuttings or other vegetative methods (which produce clones).

 

Propagation using root or stem cuttings

Advantages: This is a low tech, cheap method and a useful starting point, but it soon became clear it was not best practice.

Disadvantages: Necessity to grow saplings for several months and then dig them and trim the roots to obtain the cuttings. This is followed by further time in containers as a greenhouse while a percentage of the roots sprout, generally at varying rates and of uneven quality requiring sorting and grading before finally hardening and dispatching to the plantation. More important, however, is the disease risk inherent in any plant matter sourced directly from the ground. Soil borne fungal and other pathogens are easily transmitted and carried from sapling plot to nursery and ultimately into the plantation. Can not be delivered on demand in large quantity during short time (pre order and prepayment is obligatory, which decreases potential customers, who are deciding often the last moment.

 

In vitro propagation (cloning)

Advantages: Fast production of identical material. The plants produced from tissue cultures develop much better and free of pathogens. Under in vitro conditions from one explant could be obtained more than 1 million plants annually. All of the plants maintained the characteristics (big diameter, higher stem) of the superior tree that serves as a specimen and explant donor.

Disadvantages: Expensive, high tech method. Can not be delivered on demand in large quantity during short time (pre order and prepayment is obligatory, which decreases potential customers, who are deciding often the last moment.