Grass
| Grass | |
 |
|
| Information | |
| Seed |  Grass Starter |
| Growth Time | Varies |
| Season | |
Grass is a naturally occurring resource that is present in the Spring, Summer, and Fall seasons. At the start of the game, the player's farm has many unconfined fields of grass. Each day, it is likely that existing grass will expand and grow into adjacent unoccupied tiles. And occasionally, grass will spawn randomly on unoccupied tiles anywhere on the player's farm. Also, the player can choose to start a new patch using Grass Starter, which will create a fully grown tile of grass where the player places it.
Grass can be cut using a scythe, sword, or dagger. If the player has a silo on their farm, each grass cut with a basic Scythe has a 50% chance, with a Golden Scythe a 75% chance and with an Iridium Scythe a 100% chance of producing hay.[1] This hay is automatically stored in the player's silo(s) if there is room, otherwise, no hay is produced. Cutting grass with a sword or dagger does not produce hay.
In the winter, grass stops spreading and will produce less hay when cut, so it's advisable to collect grass when it's not winter. It is recommended that a player stores enough hay to feed their animals for the entire 28-day season in their silos. Hay can be purchased at Marnie's Ranch for 
50g each if the player does not have enough. Marnie may also send 30 hay in the mailbox at any friendship level greater than 0 points.
Blue Grass
 Warning: Spoilers  This page or section contains unmarked spoilers from update 1.6 of Stardew Valley. Players may want to avoid or be cautious toward reading this article/section. |
This new type of Grass was added in 1.6 and appears naturally on Meadowlands farms. A recipe for Blue Grass Starter can be purchased in Qi's Walnut Room for 
40 and allows Blue Grass to be placed on other farm types.
Animals eating Blue Grass gain twice the amount of friendship than normal Grass (16 instead of 8).[2] If successfully cut with a Scythe Blue Grass will produce two instead of one hay.[1]
Tips
- Paths, fences, closed gates, or pieces of furniture (such as chests or braziers) should prevent the spread of grass through the tile it occupies. However, some materials, like the stone fence, do not always operate this way.
- It is possible to exploit this by sectioning off patches of grass in animal enclosures, preventing them from eating all the grass in the area. This allows the grass to regrow more quickly, stemming from the fenced-off source patch.
Notes
- Grass has a -1 Speed penalty, unless the player is riding a horse or has read the Ol' Slitherlegs book.
Propagation
Each fully grown grass tile consists of 4 tufts of grass. Each day, every individual tile containing grass has a 65% chance of growing. If the tile containing grass has less than 4 tufts and succeeds a growth check, it will grow 1-3 additional tufts of grass. (randomly determined) If a fully grown grass tile succeeds a growth check, it will check all 4 adjacent tiles. If they are tillable, there is a 25% chance for each tile for 1-3 tufts of grass to grow.