Sorry I know this doesn't answer your question to start but if you do decide to plant the hydrangeas, I'd recommend putting coffee grounds in the soil with it. It will make pale blues bold and light pinks more purple or dark pink. My mother did it growing up and we always had beautiful ones. I have not personally grown hydrangeas myself due to living in an apartment at the moment, but upon first glance I'd say to plant them later outside or as soon as you get a chance!
Answered on May 18, 2018
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