Nice deck, a lot of land sacrificing but then it seems to work together. I would suggest an overgrowth card or two for it. Also if you wanted to hold true to your deck's name here are a few cards I would suggest: Living hive, Verdant Force or two, Wurm's Tooth, Vines of Vastwood, Fertilid, & Spore Burst. Also maybe find other cards that will give you the color of mana you choose w/o having to sacrifice your health or forests, like Rupture Spire, Ancient Ziggurat, Vivid Grove, Khalni Gem, or Mana Cylix. I like your deck however, it only seems to be a lot of sacrifice for how little land is in it with not much gain. Maybe it works well for you though. Good luck.
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