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In previous residences I have had these grow like crazy on the south side (Damp & shady), 3 years trying to propogate these from seed now, and I just can't seem to do it!! ( Once going I know they'll go strong, but goodnesss me I have spent a FORTUNE trying to get these going from seed!

https://www.yates.com.au/product/seeds/ ... usy-lizzie

Any ideas?

^ I've only ever grown them indoors: I know they seem inclined to be subject to mildew/mould.
Don't know if that's any help.