Roy for that quantity I'd recomend growing from seed. I'm not sure what the seed would run you, but it would be way less than buying the rhyzomes. The tall ones are not cheap.

Two tall canna that I can think of Muso Folio "banana canna" and Omega are both over 10 ft. COurse, that being said,I'm not sure they'd grow true from seed. But if you buy from a reputable dealer, whatever you buy, should "mostly" grow true. Your bound to have a couple runts.

But if that's something you want to do, I'd get crackin, as the season is a bit late for seeds....

Or another route, is to buy a bunch of nice tall canna rhyzome. But just buy only 1/2 of what you need. And let the gaps fill in next year.

I'd be very surprised if you can buy it very cheaply. It's a good bit of work to pull a rhyzome, clean it, package it etc. Maybe you can get a discount for bulk.

EIther way, I can't point you to a good seller, but good luck!

Check on Ebay. Lots of sellers but do check their feedback before buying. Many will combine shipping to reduce your costs. Never know, you may find someone local to you.

Good luck.

Julia

If you are looking on Ebay, the correct term is "canna Musafolia". (banana canna)