I came this product called Woolly Pockets on Martha Stewart Show. I really this idea a lot. If you are a teacher or know any schools that might be interested to have vertical garden (has limited space), you can sign up to have Woolly Pockets installed in your school.

I personally like the Wally pockets which you can use for indoor and outdoor. It's a great concept, but a bit expensive for my pocket right now.

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Wooly Pockets For Your School