Sweet Promise is a nice substitute for Austin "Summer Song". It's hardy in zone 5a, my 4-months old plant has 19+ buds/blooms - great scent. Young leaves are reddish, and glossy & healthy. Very pretty bush in my alkaline heavy clay.
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Sweet Promise is a nice substitute for Austin "Summer Song". It's hardy in zone 5a, my 4-months old plant has 19+ buds/blooms - great scent. Young leaves are reddish, and glossy & healthy. Very pretty bush in my alkaline heavy clay.