Dusty Miller seedlings- when will they turn silver?!

[Rory786]

Dusty Miller aka Sinnecio cinneraria (sorry if I have spelt it wrong)

I have lovely green seedlings, when will they turn silver please?

Probably when they get a few more leaves. The ones in garden centres tend to be about 10 cms high and with just a few silver leaves.

@beebumble2

Thank you so much