I struggled with this finicky plant for weeks, thought it was dying, turned red, and just looked like a p.o.s. One hot day, while moving my other babies out of the scorching sun, I brought the ever so unsightly zinfandel into the full shade also. And to my surprise, within hours it was reborn! So, as the exposure recommended, part sun to sun, they're wrong. I'd say full to part shade for outdoor summer months. A sunny window indoors during our Michigan winters will do the job.
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