Produce Quality
In Coral Island, there are five different quality levels for crops and animal products: Basic, Bronze, Silver, Gold, and Osmium. To increase the quality of an item, player can upgrade these items in Lings Lab using various kelp essences they obtain from diving. By doing so, players can improve the yield and quality of their harvest.
Quality can have various effects. Higher quality items are sold at a higher price. For some consumables, higher quality also results in greater stamina and HP recovery. During festivals like the Harvest Competition and Potluck, higher quality grants more points.
Items available to upgrade:
- Seeds: Increase quality of harvested crops
- Seedlings : Increase quality of fruit plant harvest
- Saplings: Increase quality of fruit tree harvest
- Hay: Increase quality of animal products
Price mechanic
Higher quality means higher sell price for product.
Basic product price * Quality Multiplier = Quality Product Price
| Basic Quality |  |
 |
 |
 | |
|---|---|---|---|---|---|
| Multiplier | 1 | 1.15 | 1.3 | 1.5 | 2 |
| Product price Example | 50 
|
58
|
65
|
75
|
100
|
Quality mechanic
Product quality is determined when the player harvests the product, not when they plant the seeds. However, the quality of the seed affects the chances of getting a certain quality when harvesting. By upgrading the seed, the player increases the chances of getting upgraded crops.
For example, if the seed is basic quality, the player has a 95% chance of harvesting a basic crop and 0% chance of getting a gold or osmium crop. But if the player upgrades to a bronze seed, the chances of getting a bronze crop increase to 55%, while the chances of getting a basic crop are reduced to 30%, and there is now a 3% chance of getting a gold crop.
The table below shows the complete percentage chance of what product the player will get:
| Chance of Basic Product | Chance of Bronze Product | Chance of Silver Product | Chance of Gold Product | Chance of Osmium Product | |
|---|---|---|---|---|---|
| at No Upgrade | 95% | 3% | 2% | 0% | 0% |
| at Bronze Upgrade | 30% | 55% | 12% | 0% | 0% |
| at Silver Upgrade | 10% | 20% | 55% | 13% | 2% |
| at Gold Upgrade | 0% | 10% | 20% | 55% | 15% |
| at Osmium Upgrade | 0% | 0% | 5% | 40% | 55% |
Using Fertilizer
There are three levels of Fertilizer that increasingly improve crop quality. All three can be crafted. Fertilizer I and II can be bought from Sam's General Store and Lings Lab.
Fertilizer I
Fertilizer I can be crafted with 2 Compost and 1 Sap or purchased for 40. The percentage chance of product quality can be found in the table below.
| Chance of Basic Product | Chance of Bronze Product | Chance of Silver Product | Chance of Gold Product | Chance of Osmium Product | |
|---|---|---|---|---|---|
| at No Upgrade | 52% | 25% | 15% | 8% | 0% |
Skills
The Farming Mastery has a skill, Quality Crop, which has a 10% chance of improving crop quality.