Any blueberry growers out there???

[socalgardengal]

I received 3 blueberry "cuttings" in a bonus trade. I've had them in a glass of water for 4 weeks now and just put them in to potting mix. The question I have is, will these grow roots?They look like a single leaf. They only have 1 bud on each and they are about 3-4". I don't want to waste my time trying if it won't work. I will post some pictures. Thank you. ~Christine