Fertilizer

From Stardew Valley Wiki
Jump to: navigation, search
See also: Crop Growth Calendars

Fertilizer is used to support crop growth and assist in farming. Some fertilizer is used by placing it on tilled soil before placing the respective seeds; other fertilizer can be used after planting a seed, as well as during plant growth.

All fertilizer can be crafted, once the required level of Farming skill is reached. Fertilizer can also be purchased at Pierre's General Store year-round, or at The Oasis on specific days of the week.

Fertilizer remains in the soil all season. When the season changes, fertilizer normally disappears. However, if a cross-season crop like Corn is fertilized, the fertilizer will remain in the soil and continue to provide benefits. Fertilizer in the greenhouse, however, will disappear after one season, even with crops that are normally cross-season.

Removing a crop with a Tool like the Pickaxe does not remove the fertilizer. Only one type of fertilizer may be used per soil tile.

Types of Fertilizer

Image Name Description When to Use Pierre's Oasis Sell Price Ingredients # Produced per Craft Recipe Source
Basic Fertilizer.png
Basic Fertilizer Improves soil quality a little, increasing your chance to grow quality crops. Mix into tilled soil. Before planting 100g 2g Sap (2) 1 Farming Skill Icon.png Farming Level 1
Quality Fertilizer.png
Quality Fertilizer Improves soil quality, increasing your chance to grow quality crops. Mix into tilled soil. Before planting 150g 10g Sap (2) Fish (1) 1 Farming Skill Icon.png Farming Level 9
Basic Retaining Soil.png
Basic Retaining Soil This soil has a chance of staying watered overnight. Mix into tilled soil. Before or after planting 100g 4g Stone (2) 1 Farming Skill Icon.png Farming Level 4
Quality Retaining Soil.png
Quality Retaining Soil This soil has a good chance of staying watered overnight. Mix into tilled soil. Before or after planting 150g 200g (Saturday only) 5g Stone (3) Clay (1) 1 Farming Skill Icon.png Farming Level 7
Speed-Gro.png
Speed-Gro Stimulates leaf production. Guaranteed to increase growth rate by at least 10%. Mix into tilled soil. Does not reduce time between harvests for multi-harvest crops. Before or after planting 100g 20g Pine Tar (1) Clam (1) 5 Farming Skill Icon.png Farming Level 3
Deluxe Speed-Gro.png
Deluxe Speed-Gro Stimulates leaf production. Guaranteed to increase growth rate by at least 25%. Mix into tilled soil. Does not reduce time between harvests for multi-harvest crops. Before or after planting 150g 80g (Thursday only) 40g Oak Resin (1) Coral (1) 5 Farming Skill Icon.png Farming Level 8

Quality Crop Ratios

First the game tests if the crop gets gold quality, if it doesn't it tries again with silver quality. If both fail the crop is normal quality.

Chance for gold quality

Farming level Normal soil Basic Fertilizer.png Basic fertilizer Quality Fertilizer.png Quality fertilizer
0 1% 4% 8%
1 3% 8% 13%
2 5% 12% 18%
3 7% 15% 24%
4 9% 19% 29%
5 11% 23% 34%
6 13% 26% 40%
7 15% 30% 45%
8 17% 34% 50%
9 19% 37% 56%
10 21% 41% 61%

Chance for silver quality

Farming level Normal soil Basic Fertilizer.png Basic fertilizer Quality Fertilizer.png Quality fertilizer
0 2% 9% 15%
1 6% 16% 26%
2 10% 23% 37%
3 14% 31% 47%
4 18% 38% 58%
5 22% 45% 69%
6 26% 53% 75%
7 30% 60% 75%
8 34% 67% 75%
9 38% 75% 75%
10 42% 75% 75%

Appearance

Once used on tilled soil, each type of fertilizer has a unique appearance, allowing you to see what type of fertilizer has been used on a given tile.

Name Unwatered Watered
Basic Fertilizer.png

Basic Fertilizer
Stardew-texture Basic-Fertilizer.png Stardew-texture Basic-Fertilizer-w.png
Quality Fertilizer.png

Quality Fertilizer
Stardew-texture Quality-Fertilizer.png Stardew-texture Quality-Fertilizer-w.png
Basic Retaining Soil.png

Basic Retaining Soil
Stardew-texture Basic-Retaining-Soil.png Stardew-texture Basic-Retaining-Soil-w.png
Quality Retaining Soil.png

Quality Retaining Soil
Stardew-texture Quality-Retaining-Soil.png Stardew-texture Quality-Retaining-Soil-w.png
Speed-Gro.png

Speed-Gro
Stardew-texture Speed-Gro.png Stardew-texture Speed-Gro-w.png
Deluxe Speed-Gro.png

Deluxe Speed-Gro
Stardew-texture Deluxe-Speed-Gro.png Stardew-texture Deluxe-Speed-Gro-w.png

Tips

Crafting Fertilizer is almost always cheaper than purchasing it. Sap is easy to come by (from cutting Trees and killing Slimes) early in game, so it's a good idea to craft Basic Fertilizer as soon as you reach Farming Level 1. It's also a good idea to craft Crab Pots as soon as you reach Fishing Level 3, to catch Fish and make Quality Fertilizer.

Each time you craft Speed-Gro or Deluxe Speed-Gro, you receive 5 fertilizers, though the "5" does not show up on the crafting menu until you have the required ingredients in inventory.

The table below shows the cost benefit of crafting Speed-Gro or Deluxe Speed-Gro rather than purchasing it. The table assumes that Clam and Coral are of normal quality.

Image Name Ingredient Sell Price Price Savings
Speed-Gro.png Speed-Gro x 5 Pine Tar (100g) Clam (50g)

Total Sell Value = 150g

Pierre's 100g (5 packs = 500g) 350g
Deluxe Speed-Gro.png Deluxe Speed-Gro x 5 Oak Resin (150g) Coral (80g)

Total Sell Value = 230g

Pierre's 150g (5 packs = 750g)

Oasis 80g (Thursday) (5 packs = 400g)

520g

170g

Bug

As of PC v1.2.33, applying Speed-Gro or Deluxe Speed-Gro to a crop after planting has no effect on crop growth, even if applied immediately after planting a seed.