Sorry this is so spread out....OOOPS.
Like most plants it depends how you site them in the landscape.
Water, soil, fertilizer,mulch all play a roll on the plants health and success.
Springtime growing conditions are dramatically different in both of the photos.
The plants shown in both photos are taken a few days apart and are within a mile of one another.
The difference in total height will 6ft vs 20ft+ at end of season
Parking lot basjoos.
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Backyard basjoos.