Do you know what variety it is? Do you still have the seed packet? They have a wealth of information on them like how many days it takes for the fruit to mature. I'd say that unless you have grown a watermelon that is supposed to be that small, you need to wait a little longer before harvesting. See the tests for maturity listed in the watermelon article above to know when it is time to pick it.
Do you know what variety it is? Do you still have the seed packet? They have a wealth of information on them like how many days it takes for the fruit to mature. I'd say that unless you have grown a watermelon that is supposed to be that small, you need to wait a little longer before harvesting. See the tests for maturity listed in the watermelon article above to know when it is time to pick it.