Heart Pieces in Oracle of Seasons

1. Horon Village (Any Season). Burn down the bush near the Maku Tree.

2. Eastern Suburbs (Winter). Head up the stairs in the southeast corner of the area and use the snowdrift to head west, entering the cave with the heart piece.

3. Woods of Winter (Any Season). Southeast of Dungeon Two, swim across the lake to collect it.

4. Subrosia Village (Any Season). Buy it from the Trading store.

5. Spool Swamp (Spring). From the third dungeon, head southeast to the rapids. Follow the rapids to arrive at the Piece of Heart, but swim towards the heart piece when you arrive to it.

6. Moblin's Keep (Any Season). Defeat the Moblin King.

7. Mt. Cucco (Spring). Drop down from the fourth dungeon to get a heart piece.

8. Eyeglass Lake (Summer). From the stump at Eyeglass Lake, head east one screen, then south, and go down the stairs under the rock. Then head back north, and down another set of stairs. Go north, and down yet another set of stairs. There, avoid the spikes, and claim the Piece of Heart.

9. Graveyard (Autumn). Go through the cave towards the southwest corner of the map to get up to the plateau where the graveyard is. Go northwest, and pick the mushrooms to get to the Heart Piece.

10. Temple Remains (Any Season). Flood the Temple Remains with lava, and then bomb one of the walls in the Temple.

11. Maple (Any Season). Appears at random. Use Maple's Ring to make Maple appear more frequently.

12. Gasha Tree (Any Season). Appears at random, but the Gasha Ring and using out-of-the-way soil patches will coerce it to come.

Thanks go to Master Deku Scrub for this guide.