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See also: Calendari di crescita delle colture

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 Emporio di Pierre 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
Fertilizzante base Migliora un po' la qualità del suolo, aumentando le probabilità che crescano colture di qualità. Mescolalo al terreno dissodato. Before planting data-sort-value="100"> 100o data-sort-value="2"> 2o   Linfa (2) 1   Farming Level 1
Fertilizzante di qualità Migliora la qualità del suolo, aumentando le probabilità che crescano colture di qualità. Mescolalo al terreno dissodato. Before planting data-sort-value="150"> 150o
(Year 2+ only)
data-sort-value="10"> 10o   Linfa (2)  Pesce (1) 1   Farming Level 9
Terriccio rattenente base Questo terriccio ha una chance di trattenere l'acqua nel corso della notte. Mescolalo al terreno dissodato. Before or after planting data-sort-value="100"> 100o data-sort-value="4"> 4o   Pietra (2) 1   Farming Level 4
Terriccio rattenente di qualità Questo terriccio ha buone chance di trattenere l'acqua nel corso della notte. Mescolalo al terreno dissodato. Before or after planting data-sort-value="150"> 150o data-sort-value="200"> 200o
(Saturday only)
data-sort-value="5"> 5o   Pietra (3)  Argilla (1) 2   Farming Level 7
Crescipresto Stimola la produzione di foglie. Garantisce una frequenza di crescita incrementata almeno del 10%. Mescolalo al terreno dissodato.
Note: Does not reduce time between harvests for multi-harvest crops.
Before or after planting (see Bug note below) data-sort-value="100"> 100o data-sort-value="20"> 20o   Catrame di pino (1)  Vongola (1) 5   Farming Level 3
Crescipresto deluxe Stimola la produzione di foglie. Garantisce una frequenza di crescita incrementata almeno del 25%. Mescolalo al terreno dissodato.
Note: Does not reduce time between harvests for multi-harvest crops.
Before or after planting (see Bug note below) data-sort-value="150"> 150o
(Year 2+ only)
data-sort-value="80"> 80o
(Thursday only)
data-sort-value="40"> 40o   Resina di quercia (1)  Corallo (1) 5   Farming Level 8

Crop Quality Ratios

Note that quality is determined at the time of harvest, and not at the time of planting. For crops that produce multiples at harvest (i.e., Coffee Bean, Blueberry, Cranberries), Basic and Quality fertilizers affect only the first crop produced.

Normal soil

Farming level % Regular quality % Silver quality % Gold quality
0 97% 2% 1%
1 91% 6% 3%
2 86% 9% 5%
3 80% 13% 7%
4 75% 16% 9%
5 69% 20% 11%
6 64% 23% 13%
7 60% 25% 15%
8 55% 28% 17%
9 50% 31% 19%
10 46% 33% 21%
11 42% 35% 23%
12 38% 37% 25%
13 34% 39% 27%

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%
11 14% 41% 45%
12 13% 39% 48%
13 12% 36% 52%

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%
11 9% 25% 66%
12 7% 21% 72%
13 6% 17% 77%

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

Fertilizzante base
   

Fertilizzante di qualità
   

Terriccio rattenente base
   

Terriccio rattenente di qualità
   

Crescipresto
   

Crescipresto deluxe
   

Fertilizer Cost

See also: When to turn your fish into Quality Fertilizer

With the exception of Quality Fertilizer, crafting Fertilizer is 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. Each time you craft Quality Retaining Soil, you receive 2 fertilizers, though crafting just one would still be cheaper than purchasing it.

The tables below compare the cost of crafting Speed-Gro or Deluxe Speed-Gro against purchasing them at the Oasis or Pierre's. The cost of crafting is the sell price of the constituent ingredients.

Cost for 5   Speed-Gro

  Clam Quality Crafting   Pierre's
No
Profession
Normal data-sort-value="150"> 150o data-sort-value="500"> 500o
  Silver data-sort-value="162"> 162o
  Gold data-sort-value="175"> 175o
  Iridium data-sort-value="200"> 200o
  Tapper
Profession
Normal data-sort-value="175"> 175o
  Silver data-sort-value="187"> 187o
  Gold data-sort-value="200"> 200o
  Iridium data-sort-value="225"> 225o

Cost for 5   Deluxe Speed-Gro

  Coral Quality Crafting   Oasis   Pierre's
No
Profession
Normal data-sort-value="230"> 230o data-sort-value="400"> 400o data-sort-value="750"> 750o
  Silver data-sort-value="250"> 250o
  Gold data-sort-value="270"> 270o
  Iridium data-sort-value="310"> 310o
  Tapper
Profession
Normal data-sort-value="267"> 267o
  Silver data-sort-value="287"> 287o
  Gold data-sort-value="307"> 307o
  Iridium data-sort-value="347"> 347o

Note: Technically it is not possible to find iridium quality clam/coral if you have chosen the Tapper Profession.

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.