All Hydrangeas in my garden are pink (with the exception of white ones).

will send you something in the post Katarina.
And the seeds arrived last week on Thursday - thank you:)

Glad, you have got it. Wow, it was very quick. Something to turn Hydrangeas blue? :-))

I went to the Garden Centre today and bought it for you:)
It contains an aluminium sulphate - that's how you get your pink hydrangeas into blue ones. But probably you'll see the results next year.

That is very kind of you, Kasia, but you shouldn t make expenses, probably it is available here. I needed advice. But thank you very much. :-)