looks good except the absence of creatures that can dish out damage. You're only real creatures are Nylea and Garruk's Horde. but she's no good if you have no other big creatures for her to give trample, and Garruk's Horde doesn't help because once you have it there's not really any other creatures you're looking for.

thanks :3 im fixing it now

much better

Thanks!

Worldspine Wurm you can play it with garruk

migumax thanks for the suggestion but its about to go out of standard or I would definitely use it!

in basacly a year... in that time there will be better things

Not a fan of either of your instants you are playing. Here are some suggestions.Giant Growth : Obvious suggestion, +3+3 at instant speed for 1 mana.Alpha Authority : A MUST-PLAY with some of your creatures. This deck fears all removal, and this stops it in its tracks. If you get this on your Kalonian Hydra the game is over.Arbor Colossus : In a mono-green with devotion in your deck, this is a definite sideboard.Experiment One : Best Green one drop, would probably trade these in for the Sylvan Caryatid as he is more for mana fixing, not for giving you more green mana but for splashing a different color.
Start with some of these suggestions, I bet it will help!