Where are you located? Soil temp is very important for melons - I have learned the hard way not to plant melons until first weekend of June. Maybe, just maybe Memorial weekend, but depends on the weather and soil temp. Cold soil + too much moisture = death for melon seedlings.

When the watermelon plant starts to bloom, you need to water less. After the flowering phase is completed, you need to irrigate every 3 days. You should take care to keep the leaves and fruit dry. You can even get a more efficient result if you place the watermelon fruit on a brick on the side. On very hot days, the leaves will most likely bend their neck and look pale. For this reason, in the evening of very hot days, you can irrigate the root part of the plants.

Source:

https://evvebahcenasil.com/karpuz-nasil-yetistirilir/