The differences

	SMARAGDFA® (Emerald Tree)	Paulovnia species	Oxi/Shang Tong
Root system	Adventitious roots system	Taproot system	Taproot system
Flowering age	3 years	3 years	3 years
Main color of inflorescence	Purple	Pink	Blue
Lifespan	25-30 years	50-60 years	N/A
Leaf Shape	Heart	Oblong, heart shape	Edgy, oblong heart shape
Possible amount of wood by the age of 8	approx. 1 m3 (Pannonian Basin)	approx. 0,5 m3 (Mediterranean areas)	approx. 0,7 m3 (Mediterranean areas)
Propagation	Tissue propagation	from seed or root cuttings	from seed or root cuttings
Vessel element	no vessel element	1/5 of the diameter	1/3 of the diameter
Expected length	20-25m	13-18m	16-18m
Invasive	no	yes	yes
Leaf surface	hairy, smooth	hairy	hairy, rough
Phyllotaxis	opposite; 2 leaf / node	3 leaf / node	random
Bole / Foliage ratio	3:02	1:02	1:01
Frost resistance	-31°C	-10°C	N/A
Dust absorb	48 t/ha	N/A	N/A
CO2 absorb	150 t/ha	N/A	N/A
Oxygen production	75 t/ha	N/A	N/A
Carbon Credit claimable	yes	no	no
Planting officially approved (Hungary	yes	no	no