That depends on how ripe it is to begin with - at most, a fully ripe watermelon at room temperature will last a day or two (depending on the heat of the room - cooler will make it last longer). If the watermelon is unripe to begin with, it could last upto a week (again, depending upon the heat of the room).
1 week
There is no telling how long a watermelon can be. They come in all different sizes.
Yes, you can freeze watermelon seeds for long-term storage.
As long as you don't overdue it, your pony may enjoy some watermelon.
A watermelon typically takes about 80-90 days to grow after flowering.
eight hours
12 years
seven days
Watermelons contain water of 92%. A "Watermelon Speech" is a speech that isn't solid. It lasts as long as a watermelon. It comes and goes and doesn't leave an effect.
~4 months
two to three days
1 year