Our own varieties.
Four hybrid varieties for cultivation in temperate, subtropical and tropical climates
For more than 14 years, WeGrow has been researching with different species of kiri trees (Paulownia). During this time, we have selected four different kiri tree hybrid varieties that are suitable for cultivation in different climatic regions and growing situations. Thus, you will find varieties for cultivation in temperate latitudes, the subtropics and the tropics. We also offer the right variety for wind-exposed sites and dry locations.
The WeGrow kiri trees varieties at a glance:
NordMax21® - the proven classic for colder climatic regions
Our NordMax21® variety is dominated by the straight and homogeneous stem growth of Paulownia fortunei. By crossing a particularly frost-hardy species, trees of the NordMax21® variety also have a high cold resistance and wide site tolerance.
To achieve the highest wood qualities, technical cut and pruning of the side shoots should be carried out in the second year of cultivation. The WeGrow variety NordMax21® achieves very high and reliable yields also in warm regions.
- Frost hardiness down to -22 °C (depending on age, cultivation management and weather conditions)
- Wide spreading crown
- Pronounced attractive flowering
- Harvest possible after 6 to 12 years
- Recommended planting scheme:
- Planting distance 5 x 3 m (660 trees / ha), after intermediate harvest 5 x 6 m
- 5 x 5 m (400 trees / ha) without intermediate harvesting
CPVO variety protection number: EU 47334
Phoenix One® - our favorite for mild climate
This cross between Paulownia elongata and Paulownia fortunei is our strongest growing hybrid variety. Due to its thick, fleshy leaves and compact growth, the WeGrow variety Phoenix One® is also suitable for cultivation in rather wind-exposed locations.
Special characteristics are the fast and cylindric stem growth as well as the narrow and compact crown, which allows a planting density of up to 825 trees / ha.
- Particularly narrow crown
- Frost hardiness down to -10 °C (depending on age, cultivation and weather conditions)
- Harvest possible after 6 to 10 years
- Suitable also for more wind-exposed sites
- No technical cut necessary
- Recommended planting scheme:
- 4 x 3 m (825 trees / ha), after intermediate harvest 4 x 6 m
- 5 x 3 m (660 trees / ha), after intermediate harvest 5 x 6 m
- 5 x 5 m (400 trees / ha) without intermediate harvesting
CPVO variety protection number: EU 39980
H2F3® - also suitable for dry sites
Our variety H2F3® is the first choice for dry sites. This cross of Paulownia catalpifolia and Paulownia fortunei has a very high root to shoot ratio. In addition, the leaf surfaces are covered with fine hairs. The resulting reduction in transpiration rate and the high root-to-shoot ratio enable the H2F3® variety to withstand prolonged periods of drought. This variety forms no or very few lateral branches in the first year of cultivation. This reduces the amount of care required and significantly increases profitability.
We recommend cultivation in wind-protected locations.
- High drought stress tolerance
- Frost hardiness down to -20 °C (depending on age, cultivation and weather conditions)
- Medium spreading crown
- Harvest possible after 6 to 12 years
- No technical pruning necessary
- Recommended planting scheme:
- Planting distance 5 x 3 m (660 trees / ha), after intermediate harvest 5 x 6 m
- 5 x 5 m (400 trees / ha) without intermediate harvesting
CPVO variety protection number: EU 57858
H2F4® - extremely fast growth and almost knot-free
Characteristic of our latest breeding is the extremely fast growth in height and the very straight and homogeneous stem growth. Our cross of Paulownia catalpifolia and Paulownia fortunei does not form side branches in the first year of cultivation. This reduces the maintenance effort and increases the profitability significantly. We recommend cultivation in wind-protected locations.
- Frost hardiness down to -20 °C (depending on age, cultivation and weather conditions)
- Medium spreading crown
- Harvest possible after 6 to 12 years
- No technical cut necessary
- Recommended planting scheme:
- Planting distance 5 x 3 m (660 trees / ha), after intermediate harvest 5 x 6 m
- 5 x 5 m (400 trees / ha) without intermediate harvesting
CPVO variety protection number: EU 54916
What is CPVO variety protection?
The Community Plant Variety Office (CPVO) has been responsible for the protection of plant varieties of the European Union since 2015. To protect breeders and their investments, varieties can be protected as intellectual property at the CPVO. For tree varieties such as our kiri trees, protection is granted for 30 years.
In this process, each variety undergoes a lengthy technical examination before a plant variety protection is granted. The new varieties must meet the criteria of distinctness, uniformity and stability. This ensures that the varieties are clearly distinguishable from other varieties at the time of application, that they have uniform characteristics and that they remain unchanged in repeated propagation.
Please note: all WeGrow varieties are protected by CPVO variety protection. Sale and multiplication is only allowed to our registred license partners.
Find the right kiri tree variety for you
In order to be able to select the best suited variety for your individual location, you are welcome to use our variety finder:
You would like to learn more? Contact us!
We are happy to advise and accompany you. From site analysis to variety selection, planting and care, to harvesting and distribution of your Kiri wood. Call us today or send us a message via our contact form. We look forward to hearing from you.