Determining the ripeness of watermelon before harvesting is crucial. Several indicators are commonly used:
(1) Withering of the tendril near the place of fruit attachment: The tendril closest to the fruit often dries up and turns brown as the watermelon ripens. This is a reliable indicator.
(2) Change of ground spot colour of the fruit: The spot where the watermelon rests on the ground (ground spot) changes from a pale white or light green to a creamy yellow or richer yellow color as it ripens. This is another good indicator.
(3) Dull-thud sound on thumping the fruit: A ripe watermelon typically produces a dull, hollow thud when thumped, whereas an immature fruit gives a sharper, more metallic sound. This is a common, though somewhat subjective, indicator.
(4) Changing in fruit shape: The basic shape of the watermelon fruit is determined early in its development and does not significantly change as an indicator of ripening. While the fruit swells and increases in size during maturation, its fundamental shape (round, oblong, etc.) remains consistent. This is NOT a true indicator of the ripening stage.
Therefore, a change in fruit shape is not a reliable indicator of watermelon ripeness.
Changing in fruit shape