You will have no problems at all with them as they are herbaceous and very shallow rooted. The roots are totally non destructive and will only enter pipes if they are already broken.

Andrew.

The only Ginger I would not plant is Alpinia. Wont affect your pipes but is a cow of a job if you have to dig out at a later date.
Ian

Do it Ree - these are some of the best behaved plants in my garden.

Good luck,

Artie

Thanks folks, I'm new to gingers and was really surprised to see how quickly the root system developed during spring.

They are sarting to multiply so it won't be long and i'll have a lovely, lush ginger collection.

Ree

You just need one good wet season for them to go beserk in the north qld. Once they are away, you can't stop them. I love them all.

Although, make sure you know where you plant curcuma as they will go dormant in the dry season - otherwise you might end up digging them up accidently.

Regards, Ari :)