Paulownia Plantations

Seedlings selection

Paulownia seedlings bred in vitro have to be adapted to daylight illumination and temperature difference for 10-15 days before transplanting to open ground. In case of seedlings, which are already adapted in hothouse conditions, they can be transplanted right away. The larger plants - the better, because tall plants are less likely to be destroyed by rodents or other negative factors. Ideally, Paulownia fields must be protected from rodents, birds, livestock and other bio factors. Alternatively, already wintered saplings 0.5 meters tall can be transplanted.

Lot selection

The tree is quite unpretentious: soil should be only easily permeable to water and air, and shouldn’t be clayey. The soil layer must be at least 1.5 meters thick. Stones, even big ones, are not the problem. Rocky layer shouldn’t be right under the tree. Paulownia isn’t tolerant to acid soils: its pH optimum is above 5.5.

Paulownia also isn’t tolerant to high subterranean waters, the level of which should not be higher than 1.5 meters. Regular and sufficient irrigation is necessary for young plants. Drip irrigation during the first two years causes the best growth rate!

After the lot has been selected, it must be ploughed up. In case of using a drill 60 centimeters in diameter and when 60-100 centimeters deep pits are being dug, ploughing is not necessary.

Saplings of Paulownia can be transplanted from the beginning of November till the end of April. Seedlings of Paulownia are usually planted from the end of April until the beginning of August.

When planning a plantation, it is necessary to keep in mind, that the field has to be passable for farming machines such as tractors, croppers, spraying machines, etc. Saplings landing charts depend on the purpose of the plantation.

If you cultivate Paulownia on a limited scheme the maximum profit would be 3x3 meters. This is: 1050 saplings per 1 hectare. On the fourth year you’ll have to cut off some trees chequer-wise so that they wouldn’t hinder each other. As a result of that, in another four years period, half of the trees in your forest would be eight-year-old and another half – four-year-old (the trees cut on the fourth year would regenerate). At that time you should cut off the eight-year-olds, etc. This is how you start to collect eight-year-old trees every four years. The only disadvantage of this scheme is that you have to be very careful not to damage adjacent trees when cutting plants chequer-wise. This slows the process considerably.

When trees are grown for bio mass according to the 2x0.5 or 1x1 meters scheme, there must be about 10 000 saplings planted per 1 hectare.