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Polka or New Dawn for my arbor

Rose Lai (9b)
4 years ago

I have two climbing Don Juan for the last years. By mid-July, they are covered with rust. Spraying does not help much, so I am thinking of replacing them with either Polka or New Dawn. Can anyone share their experience growing these 2, particularly in a coastal climate? In HMF some said that New Dawn did not repeat well for them and grew too large for their space. I welcome other suggestions. The qualities I prioritize are 1. Disease resistance; 2. Repeat flower well; 3. Vigorous. Smell is not important as my chronic allergy gets in the way. I am flexible with color.

Below is a picture of my arbor. It is 8 feet tall, and 6- 7 feet from one side to the other. I am in zone 9b, sunset 14, SF Bay with strong coastal influence. Rust, downy and powdery mildew are problems in my microclimate.

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