In Silent Friend, Hannes (Enzo Brumm) is profoundly transformed while caring for a plant. Lena Kettner/Pandora Film hide caption toggle caption Lena Kettner/Pandora Film Some movies will forever change the way you look at plants. Unsurprisingly, many of them are thrillers and science-fiction films, like Little Shop of Horrors , The Day of the Triffids , or, more recently, the mind-controlling flower freakout Little Joe . You could probably make a more sinister version of the new drama Silent Friend , which dares to suggest that the tree outside your door or the geranium on your windowsill might be studying you intently — and might even reach out, if it could, and tell you what it's thinking. But the Hungarian filmmaker Ildikó Enyedi isn't interested in scaring us. She wants us to leave this movie feeling more connected to the natural world.…