Timmo wrote:

Its not has fast growing as I thought, as its starting to be dwarfed by it neighbours! - Canna musifolia and paulonia tomentosa

From what I heard, a Tetrapanax being dwarfed by a Canna should be only be very temporary. They're huge beasts 

credit: this page

Jasper

For heaven's sake caution everyone about these plants.  They are EXTREMELY invasive, fast growing and will fill an entire yard or other space in no time.  The dusty material that forms on the stems can cause choking and upper respiratory iritation.  The plants were already in the yard when we moved to Louisiana and I have been fighting them ever since we arrived.  One year they were above the roof of the house until I chopped them down.  They freeze in winter, but come back with a vengance in spring.  I'm sorry for the poor Brit who paid 25 quid for one when I'm trying to kill all of them.  The story here goes that they were planted in chicken yards to provide shade for the birds.  I suppose they would do well in large containers, but I urge caution when planting them in your yard.