I really love the concept of a community garden that can be a venue for workshops and other events, being financed by Steem. I'm not sure how much space you actually will have but if space is a limitation, have you considered vertical plant walls? Could be in the shape of the letters: 🌿S🌿T🌿E🌿E🌿M🌿I🌿T🌿 perhaps?
Also will you consider edible plants, grown organically of course, as part of the garden? Could generate an income to maintain the garden or provide food to those who most need it.
Love the idea of the Brooklyn Steem Park being just the first of many iconic community gardens all over the world. 🙏🌳🌿🍄🌿🌳🙏