Mistake at 7:30 - just to clarify after these games I believe that Turn the Earth would NOT trigger Willow Geist three times, it would just get a single +1/+1 counter. Season of Renewal behaves differently and provides two triggers.
Something like Lion Sash might be the most efficient pairing with Willow Geist - one white mana to grow both creatures, not bad.
Deck
4 Deathbonnet Sprout (MID) 181
4 Vilespawn Spider (VOW) 250
3 Willow Geist (MID) 207
2 Teachings of the Kirin (NEO) 212
9 Forest (HBG) 308
7 Island (HBG) 296
4 Eccentric Farmer (MID) 185
1 Slogurk, the Overslime (MID) 242
2 Tatyova, Steward of Tides (DMU) 222
1 Season of Renewal (NEO) 205
3 Splendid Reclamation (VOW) 221
1 Dryad's Revival (MID) 183
1 Colossal Skyturtle (NEO) 216
1 Boseiju, Who Endures (NEO) 266
1 Otawara, Soaring City (NEO) 271
2 Roaring Earth (NEO) 204
4 Brokers Hideout (SNC) 248
4 Evolving Wilds (IKO) 247
4 Azusa's Many Journeys (NEO) 172
2 Shigeki, Jukai Visionary (NEO) 206