Magic the Gathering: Trying to make a strong/annoying all green deck?

Lanowar Elves, Joraga Treecaller, Cultivate, Birds of Paradise, Harrow, and Primeval Titan are all very good mana ramp cards and I suggest adding them to the deck. 20 forests will be enough if you include the cards I mentioned. There is a land (cant remember the name) that taps to put a +1/+1 counter on each green creature that came into play this turn.