As we know, fertilizer reduces the grow time of plants. After some research and very in-depth testing detailed below we've found that fertilizer reduces grow time by roughly 1% of the remaining grow time of a plant. We also found that there is no upper limit to the number of fishmeal you can use before it stops having an effect.


The gardening community was able to organize a project where the goal was to fertilize a Thavnairian Onion 100 times in a row. We ended up fertilizing a total of 120 times and reduced the total grow time by 117 hours (4.875 days)!

While there is no limit to fishmeal it's really not feasable that your average gardender can fertilize every single hour over the life of a plant. Furthermore it's best to fertilize earlier rather than later in the grow cycle. For instance, the first fishmeal applied to the Thavnairian Onion reduced grow time by 142 minutes. Once we applied the 50th fishmeal we were down to 64 minutes of growth reduction. By the 100th fishmeal growth reduction was down to only 15 minutes.

You can view our test results with more detailed calculations on our 100+ fishmeal project spreadsheet.


The table below lists the grow time reduction for each grow time available. Keep in mind these numbers assume you apply fishmeal consecutively without missing an hour. This will give you a rough idea of how much total grow time you can reduce depending on how many fishmeal you have applied.

As an example, feeding one fishmeal to a 1-Day plant will reduce grow time by a total of 14 minutes. Feeding five fishmeal to a 1-Day plant will reduce grow time by a total of 1 hour and 4 minutes.

Number of Fishmeal Applied
Grow Time Total Grow Time Reduction
1 2 3 4 5 6 7 8 9 10
12 Hour 7m 14m 19m 25m 29m 33m 36m 39m 41m 42m
18 Hour 11m 21m 30m 39m 47m 54m 1h 1h 6m 1h 12m 1h 16m
22 Hour 13m 25m 37m 48m 58m 1h 8m 1h 17m 1h 25m 1h 32m 2h 39m
1 Day 14m 28m 41m 53m 1h 4m 1h 15m 1h 25m 1h 34m 1h 42m 1h 50m
2 Days 29m 56m 1h 23m 1h 49m 2h 14m 2h 38m 3h 1m 3h 24m 3h 46m 4h 7m
3 Days 43m 1h 25m 2h 5m 2h 45m 3h 24m 4h 2m 4h 38m 5h 14m 5h 49m 6h 23m
5 Days 1h 11m 2h 21m 3h 30m 4h 37m 5h 44m 6h 48 7h 52m 8h 55m 9h 56m 10h 56m
6 Days 1h 26m 2h 50m 4h 12m 5h 34m 6h 53m 8h 12m 9h 29m 10h 45m 11h 59m 13h 12m
7 Days 1h 40m 3h 18m 4h 55m 6h 30m 8h 3m 9h 35m 11h 6m 12h 35m 14h 2m 15h 29m
10 Days 2h 23m 4h 43m 7h 2m 9h 18m 11h 33m 13h 46m 15h 56m 18h 5m 20h 12m 22h 18m