Deluxe Fertilizer
| Deluxe Fertilizer | |
|---|---|
 | |
| Type | Crafted Item |
| Recipe | Qi's Walnut Room (20) |
| Produces | 5 Deluxe Fertilizer per craft |
| Sell Price | 70g |
Deluxe Fertilizer is the strongest quality fertiliser in the game and the only route to iridium-star crops. It sits at the top of a ladder that starts with Basic Fertilizer and Quality Fertilizer. Its recipe is sold in Mr. Qi's shop on Ginger Island, which makes it an end-game reward rather than an early tool. Each craft turns a single Iridium Bar and a large stack of Sap into a batch of bags. For anyone selling top crops raw, it is the biggest quality boost a field can get.
Recipe
The recipe is bought with Qi Gems in Qi's Walnut Room, on the west coast of Ginger Island. Once learned, it can be crafted as often as the materials allow.
Sap is the easy half of the cost. Chopping trees on the farm keeps a steady supply flowing, and Slimes drop it as well. The Iridium Bar is the expensive half. Smelting Iridium Ore with Coal in a Furnace makes the bars, and the Skull Cavern is the classic place to dig up that ore. Purple Slimes there sometimes drop finished Iridium Bars too. Each craft yields several bags at once, so one bar stretches across a decent patch of soil.
These are the ingredients one batch needs.
| Name | Image | Amount |
|---|---|---|
| Iridium Bar | 
|
1 |
| Sap | 
|
40 |
Use
This fertiliser is forgiving about timing. It can be mixed into tilled soil before planting, right after sowing, or at any stage while the crop grows. A field already in the ground can still be upgraded on the day the bags are crafted.
The benefit shows at harvest. A crop grown in Deluxe Fertilizer has a chance to come up with an iridium star, a quality no other fertiliser can reach. Iridium quality doubles a crop's base sell price, so the gap over plain crops is large. Five Starfruit grown this way, for example, earn far more at the Shipping Bin than five grown in bare soil.
How long it lasts depends on where it goes. Outdoors, it is lost when the season ends and the field resets. In the Greenhouse, it stays in the tile until the soil is broken up, so one application serves crop after crop there.
Variants
The other fertilisers in the game, with what each one takes and where the recipe comes from.
| Name | Image | Ingredients | Recipe |
|---|---|---|---|
| Basic Fertilizer | 
|
Sap (2) | Farming Level 1 |
| Basic Retaining Soil | 
|
Stone (2) | Farming Level 4 |
| Deluxe Retaining Soil | 
|
Stone (5), Fiber (3), Clay (1) | Island Trader for Cinder Shard (50) |
| Deluxe Speed-Gro | 
|
Oak Resin (1), Bone Fragment (5) | Farming Level 8 |
| Hyper Speed-Gro | 
|
Radioactive Ore (1), Bone Fragment (3), Solar Essence (1) | Qi's Walnut Room for 30 |
| Quality Fertilizer | 
|
Sap (4), Any Fish (1) | Farming Level 9 |
| Quality Retaining Soil | 
|
Stone (3), Clay (1) | Farming Level 7 |
| Speed-Gro | 
|
Pine Tar (1), Moss (5) | Farming Level 3 |
| Tree Fertilizer | 
|
Fiber (5), Stone (5) | Foraging Level 7 |
Notes
The extra stars only pay when the crop is sold or gifted as it is. Kegs, Preserves Jars and Dehydrators pay no attention to star quality, so wine and jam fields gain nothing from it.
Pairing it with a high-value crop gives the clearest return. The cost of one Iridium Bar is small next to the extra gold from a field of iridium-star Starfruit or Ancient Fruit.
All Crafting
Every entry in this group, with its key details.
