Is there anything safe you can put over your plants outside to give it a few extra hours of darkness?

I was thinking of something such as a industrial sized/strength black plastic trash bag. Plant would definitely fit inside, I don't think that light would penetrate it? What is everyone's thoughts and ideas!!??

Am interested in your responses! :thumbsup:
420somewhere Reviewed by 420somewhere on . Force Flowering outside...a few questions! Is there anything safe you can put over your plants outside to give it a few extra hours of darkness? I was thinking of something such as a industrial sized/strength black plastic trash bag. Plant would definitely fit inside, I don't think that light would penetrate it? What is everyone's thoughts and ideas!!?? Am interested in your responses! :thumbsup: Rating: 5