Hi Fabian,
There are a few of us 'southerners' here. The good news is that your new lilies will adapt. From experience sending bulbs the other way - to the north - it does take some time though. Scales are much better at getting in sync. with their new home. Yours look wonderful, you did the right thing by scaling your new bulbs!
If you can plant the mature bulbs out in your garden, or in pots exposed to the natural elements, and just leave them to experience what the seasons provide, I think it would be best. Then give them a couple of years to figure it out.
I'm no expert, but a big believer in just leaving nature to do the 'hard' work.
Your blooms were lovely, hope you stick around to find a whole world of new lily possibilities!
