Don't bother with this ridiculous movie. If I never see another ginger in my life it'll be too many. The lead actor's hair was its own character. And then another character was, you guessed it, an Irish ginger. The acting was abysmal but they didn't have much to work with - story was the level of a children's book. Sure, a plant lab staffed by idiots, including a supposedly brilliant scientist who blithely removes one of the experimental plants and brings it home. She spends the entire movie looking like a red headed rabbit and saying, "What??" Ben Whishaw - sorry to see you in this inane film.
Then there's the soundtrack. Why the filmmakers wanted to inflict tinnitus on the audience, I can't imagine. At first the "Little Joe Theme" was vaguely Asian and musical but as the time wore on, the noise became louder and more dissonant including screeching, drumming and even angry dogs barking. I guess this was supposed to reinforce the reality of the plants' development into scary, reality altering sentient beings, but it was painful even for people who already have tinnitus (me).
I didn't enjoy the color palette either. There was no reality to this film at all, from the characters to the lighting to the hideous sound scheme. Science fiction has to be believable or plausible to work. This film was neither. I'm actually giving it half a star.