Fool proof tips on success with Cobaea, please?

My seeds have been planted in a windowsill propagator in those little brown disks which suddenly swell up when water is added.

I have garden envy from Shineyland and really hope I can have a smashing display this year.

So: tips, hints and fool proof gardening advice very much appreciated.

 

I just stick em in on their ends, give them about 80f and water and they usually come up in a week or so.

 

Thanks, pete.

They are now forming their second set of leaves and are already quite tall. So, I'm guessing now is the right time to pot them up?

Questions: once potted on, should they
a) stay indoors for a bit longer
b) go into my (brand, spanking new, lucky me) Grow House for more nurturing?

 

I shall do that and sing them a lullaby before they go to bed