I primarily want to work with green because its associated with growth, nature, heath, and fertility. I'm thinking about using some shade of yellow as a secondary color because it gives a sense of clean, brightness/optimism that I think is representative of the urban garden. And, maybe brown or white as a neutral in small amounts.
Here's a pdf of some color combos...
color.pdf
Here's a pdf of some color combos...
color.pdf
I really like the color options you came up with. the greens and yellows are a must. could red or orange maybe be in there too? maybe even brown? may work, may not just a thought.