Which tree?

Bit of an odd one here, thankyou for reading and hope someone can offer some assitance, thanks in advance. Hi my names Henry, I'm an artist recently graduated in Norwich, England. I've just been offered a solo show in London which is an amazing opportunity but its next month and i have alot of work to do.
One of the pieces i'm hoping to make is a small tree or large shrub, something maybe like the lily tree, which would be in the middle of a pool of coloured water. Similar to the old science experiments that you do in school, I'm hoping that with enough dye in the water the flowers on the tree would turn red'ish.
I'm wondering if anyone knew if this would work the same as with flowers in water. I'm guessing it may take some time for the colour to take hold though.
If it is possible, i'd be looking for a largish shrub or small tree about 2 or 3m tall with lots of white flowers on it, prefrably something that wouldn't die if kept inside for a week. I'm guessing most would start to wilt a bit but some maybe more than others.
If anyone has any ideas on whether it would work or what type of plant i could use it would be greatly appreciated, thankyou.



Henry

 

Hello and welcome Henry.
Bit of a poser you've set us there.
I've been racking my brains trying to think of large shrubs or small trees with white flowers, which flower in October.
The only one that springs to mind at present is a shrub called Fatsia japonica. This bears a number of smallish white flowers in a 'candelabra' type arrangement, surrounded by large glossy green leaves.
fatsia japonica flowers - Google Search
It's a shade tolerant plant which is sometimes used in large indoor planting schemes, so being indoors for a week shouldn't be a problem.
As for whether the flowers would take up the dye colouring, I have absolutely no idea!

 

here are some shrubs/flowers that are in bloom in october ... you might find something that can be used:

Plants which flower in October