Fertilizer

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. Fertilizer affects all crops, including crops grown from Wild Seeds.

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, there are two exceptions in which fertilizer will remain in the soil:

• If a multi-season crop (i.e., Ancient Fruit, Coffee Bean, Corn, Sunflower, or Wheat) is planted in the fertilized tile, and the new season is one in which the crop grows, the fertilizer will remain.
• Any crop planted in the greenhouse before its normal growing season will retain its fertilizer if the new season is one in which it normally grows.

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	Improves soil quality a little, increasing your chance to grow quality crops. Mix into tilled soil.	Before planting	data-sort-value="100">100g		data-sort-value="2">2g	Sap (2)	1	Farming Level 1
	Quality Fertilizer	Improves soil quality, increasing your chance to grow quality crops. Mix into tilled soil.	Before planting	data-sort-value="150">150g		data-sort-value="10">10g	Sap (2) Fish (1)	1	Farming Level 9
	Basic Retaining Soil	This soil has a chance of staying watered overnight. Mix into tilled soil.	Before or after planting	data-sort-value="100">100g		data-sort-value="4">4g	Stone (2)	1	Farming Level 4
	Quality Retaining Soil	This soil has a good chance of staying watered overnight. Mix into tilled soil.	Before or after planting	data-sort-value="150">150g	data-sort-value="200">200g (Saturday only)	data-sort-value="5">5g	Stone (3) Clay (1)	2	Farming Level 7
	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 (see Bug note below)	data-sort-value="100">100g		data-sort-value="20">20g	Pine Tar (1) Clam (1)	5	Farming Level 3
	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 (see Bug note below)	data-sort-value="150">150g	data-sort-value="80">80g (Thursday only)	data-sort-value="40">40g	Oak Resin (1) Coral (1)	5	Farming Level 8

Crop Quality Ratios

Normal soil

Farming level	% Regular quality	% Silver quality	% Gold quality
0	97%	2%	1%
1	91%	6%	3%
2	86%	10%	5%
3	80%	13%	7%
4	75%	16%	9%
5	69%	20%	11%
6	64%	23%	13%
7	60%	26%	15%
8	55%	28%	17%
9	50%	31%	19%
10	46%	33%	21%

Soil with basic fertilizer

Farming level	% Regular quality	% Silver quality	% Gold quality
0	87%	9%	4%
1	77%	15%	8%
2	68%	20%	12%
3	59%	26%	15%
4	50%	31%	19%
5	42%	35%	23%
6	35%	39%	26%
7	28%	42%	30%
8	22%	44%	34%
9	16%	47%	37%
10	15%	44%	41%

Soil with quality fertilizer

Farming level	% Regular quality	% Silver quality	% Gold quality
0	78%	14%	8%
1	64%	23%	13%
2	52%	30%	18%
3	40%	36%	24%
4	30%	41%	29%
5	20%	46%	34%
6	15%	45%	40%
7	14%	41%	45%
8	12%	38%	50%
9	11%	33%	56%
10	10%	29%	61%

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
Quality Fertilizer
Basic Retaining Soil
Quality Retaining Soil
Speed-Gro
Deluxe Speed-Gro

Tips

Crafting Fertilizer is almost always cheaper than purchasing it. 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 x 5	Pine Tar (data-sort-value="100">100g) Clam (data-sort-value="50">50g) Total Sell Value = 150g	Pierre's data-sort-value="100">100g (5 packs = 500g)	data-sort-value="350">350g
	Deluxe Speed-Gro x 5	Oak Resin (data-sort-value="150">150g) Coral (data-sort-value="80">80g) Total Sell Value = 230g	Pierre's data-sort-value="150">150g (5 packs = 750g) Oasis data-sort-value="80">80g (Thursday) (5 packs = 400g)	data-sort-value="520">520g data-sort-value="170">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.