Crop growth

References

1. ^ abIn the US release, a crop is a run of tile numbers in groundObjectsInfo, each growth stage a dry tile followed by its watered twin. The watering can turns a waterable tile into the next number (dry soil into watered soil). Each night, updateGroundObjectsOvernight reads a flag byte per tile: a watered stage moves on to the next stage's dry tile, watered soil and a watered ripe crop go back to dry, and a dry stage stays where it is. So a crop grows one stage per watered day and a dry day doesn't count. Worked out from the table (computed), the watered days from sowing to ripe are: turnip 4, potato 6, strawberry 6, moondrop flower 6, cabbage 7, eggplant 7, pink cat mint 8, tomato 9, corn 13. Grass's stages aren't waterable and advance every night: 9 nights from seed.Codeharvestwhisperer/hm64-decomp
   How we know

   236    u8 playerInteractionFlags;
   

   47    { 0x07, 0x00, 0x00, GROUND_OBJECT_TILLABLE, 0x09 },
   ⋮
   49    { 0x07, 0x00, 0x00, GROUND_OBJECT_TILLABLE, 0x09 },
   

   1242                    currentGroundObject++;
   

   3096                temp2 = currentGroundObjectIndex + 1;
   

   171    { 0x06, 0x00, 0x00, GROUND_OBJECT_TILLABLE, 0x09 },
   172    { 0x06, 0x00, 0x00, GROUND_OBJECT_TILLABLE, 0x09 },
   173    { 0x06, 0x00, 0x00, GROUND_OBJECT_TILLABLE, 0x09 },
   

   Checked against the evidence by its author, an AI model, 2026-10-22.

   Checked by a second AI model, 2026-10-22.

   In the claim ledger

2. ^ abIn the US release, each night the new day's weather is set before the crops update; then, if it is rain, updateCropsIfRain turns every waterable tile on the farm into its watered twin, as the watering can would, so a rainy day counts as watered. The greenhouse isn't touched.Codeharvestwhisperer/hm64-decomp
   How we know

   691    gWeather = gForecast;
   

   1473                        setFieldTile(FARM, groundObjectIndex + 1, j, i);
   

   Checked against the evidence by its author, an AI model, 2026-10-22.

   Checked by a second AI model, 2026-10-22.

   In the claim ledger

3. ^ abIn the US release, the farm's overnight update has a rule for the night that starts a season (the day of the month is 1 by then). Summer turns sprouted-or-older turnips, potatoes, and cabbages into dead plants and their seed stages back into tilled soil. Autumn does the same to tomatoes, corn, moondrop flowers, and pink cat mint, and sends any spring seed stages to tilled soil. Winter clears dry tilled soil, weeds, eggplants at every stage, the dead plants, and the remaining seed stages to the bare tile. Spring turns grass back to cut grass and returns tilled soil to the bare tile when getRandomNumberInRange(0, 5) >= 3. Strawberries, whose seeds sow only in the greenhouse, appear in none of the lists, and the greenhouse loop has no season rule.Codeharvestwhisperer/hm64-decomp
   How we know

   1292                                case TURNIP_SPROUT_STAGE_1 ... TURNIP_RIPE_WATERED:
   

   1321                                case TOMATO_SPROUT_STAGE_1 ... TOMATO_RIPE_WATERED:
   

   1350                                case POTATO_DEAD ... EGGPLANT_RIPE_WATERED:
   

   1384    // greenhouse
   1385    for (i = 0; i < FIELD_HEIGHT; i++) {
   ⋮
   1389            currentGroundObject = greenhouseFieldTiles[i][j];
   ⋮
   1409                 greenhouseFieldTiles[i][j] = currentGroundObject;
   

   3486        groundObjectIndex = (gBaseMapIndex == GREENHOUSE) ? STRAWBERRY_PLANTED_STAGE_1 : INVALID_GROUND_OBJECT;
   

   700    updateGroundObjectsOvernight();
   

   2541        setClockNewDay(); 
   

   Checked against the evidence by its author, an AI model, 2026-10-22.

   Checked by a second AI model, 2026-10-22.

   Checked by a second AI model, 2026-10-25.

   In the claim ledger

4. ^In the US release, picking a ripe tomato, ear of corn, or eggplant puts back an earlier stage (tile 0x5F, TOMATO_PLANT_STAGE_1; 0x7A, CORN_PLANT_STAGE_1; 0x2A, EGGPLANT_STALK_STAGE_1) under a comment reading "replace with stalks", so the plant ripens again after 3, 4, and 3 more watered days (computed from the table). Any other crop picked leaves soil (dry or watered, as the ripe tile was) or a bare tile.Codeharvestwhisperer/hm64-decomp
   How we know

   4139                        addGroundObjectToMapFromPlayerPosition(0x5F, 1.0f, 8);
   

   61#define EGGPLANT_STALK_STAGE_1 42
   

   114#define TOMATO_PLANT_STAGE_1 95
   

   141#define CORN_PLANT_STAGE_1 122
   

   Checked against the evidence by its author, an AI model, 2026-10-22.

   Checked by a second AI model, 2026-10-22.

   In the claim ledger