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My research shows that the average width of these is around 3 to 5 feet. Here is an article for more information on these shrubs:https://www.gardeningknowhow.com/ornamental/shrubs/sweet-pea-shrubs/growing-sweet-pea-shrubs.htm
All of my sweet pea shrubs (4) suddenly all look dead! Is this normal?
This is not normal! It would help to know where you are located and to have pictures. These are very sensitive to cool temperatures.
This article will give you more information on these shrubs: https://www.gardeningknowhow.com/ornamental/shrubs/sweet-pea-shrubs/growing-sweet-pea-shrubs.htm
I have been recommended petite butterfly sweet pea shrubs and company them with star jasmine.
I would like to know about plant pests and flowering seasons or what plants would be most trouble free that you would recommend
Those are good choices for your area. As for plant pests... tey carry the same risks for the same pests as most plants. I will include an article for both plants, and a link to ways to craft your own pest controls that will help you here.
SweetPea Shrub: https://www.gardeningknowhow.com/ornamental/shrubs/sweet-pea-shrubs/growing-sweet-pea-shrubs.htm
Star Jasmine: https://www.gardeningknowhow.com/ornamental/flowers/jasmine/star-jasmine-as-ground-cover.htm
Organic pest control and overall garden health: https://www.gardeningknowhow.com/special/organic/
