In US we usualy propagate them from cuttings, not from seeds.
I see you are from Turkey, are they grow there at all?
If so, try to obtain cuttings, and next year you'll have a meaningfull size plants from them.

Thanks ego45,

Yes, hydrangeas grow very well here, unfortunately it is really hard to find different variaties.
Mopheads are common but PeeGee or lacecaps are almost impossible to find.So getting cuttings is not possible at the moment, that is why I bought the seeds.
I have 7 pots of wonderful mopheads in my balcony and hope to have a pee gee and a climbing hydrangea.

So I need more info on propagating time for these seeds.

Thanks,

I don't find much information on starting hydrangea from seed from my normal sources -

"Fresh Seed - Sow indoors 50F, high humidity. Germination varies depending on species from as short as a few weeks for fresh H. quercifolia."

Not particularly helpful, and I find that 50F temperature range very difficult.

You might try a few of your climbing hydrangea using your refrigerator for the cold moist period. Sow, cover pot with plastic wrap, date it, and place in your refrigerator for the required month.
Clothiers: "Hydrangea anomala subsp. petiolaris , Climbing hydrangea , sow 1 month @ 39ºF, move to 70ºF for germ.

Thanks, I will test some of the seeds that way and keep some for spring.We will see what will be the best.

Best,