The danger here is that I see the same basic dark-green pattern applied asymmetrically dozens of times. And the file isn't a power of two, which means if I were to put this in a game engine I would have to Photoshop it a good deal before it was usable. While Photoshopping though, I'd probably make a 256x256 chunk (so it's all unique and not nearly as repetitive) and repeat the UVs however many times as necessary, then apply another, similar layer with an alpha to mask the obvious repletion in this tile.
OK; made the texture 1024X1024 (so power of 2 compatible) as well as bigger so the repeating pattern won't be as obvious. Click link below for texture (limited storage size for free Deviant account; lol).
I hate to say it man but I'd have to argue that the size of the texture is one of the smallest problems with the texture. The image is made of near identical values except for one dark green pattern, which makes it the most recognizable pattern. The problem with your texture is that the most recognizable pattern is very obviously copied many times over. Here is a quick illustration of what I'm talking about: [link]
Unfortunately, that sort of texturing makes this unusable as a texture. Have you seen any of the majoring texturing sites? None of their textures have clone stamped areas like yours, which allows artists to get more mileage out of each texture sheet.