Mine were looking really good this year, until we went into a dry spell. Some of mine I've had 3 yrs now, and they still look blah by the end of the summer. I keep mine mulched year around. I will trim them up during the winter and give them some compost early spring. They need a lot of water. I don't worry about the ph with mine. They can be what ever color they want.
This is how mine looked in their 2nd year . They are planted on the North/East side of the house:
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These are the same plants in May of this year. They are about the same size as they were last year.
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They supposed to get 3' wide & 4' tall. I don't think they ever will. I don't know if I would plant them again. They need so much water in the summer. At least I got them for half price.