Answer: It might be a little too cool in San Francisco for a Jacaranda tree to thrive. I don't think yours will ever be a beautiful specimen so having it in the front yard probably isn't the best place. I'd wait until this fall or winter and move the Jacaranda back into the back yard.
Good street trees for your area include:
Cercis canadensis (Eastern Redbud)
Lagerstroemia indica x L. fauriei (Crape Myrtle)
Prunus cerasifera ?Thundercloud? (Purple Leaf Plum)
Pyrus kawakamii (Evergreen Pear)
All flower in the springtime.
Best wishes with your trees!
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