Melons are best started indoors 4 to 5 weeks before your average last spring frost and planted out into warm soil.
The maturity date is roughly when you can expect ripe fruits after planting out. Early season is about 60 days from transplant, and Late season is about 90 days from transplant. Mid season falls anywhere in between. Since melons are heat and sun lovers, weather impacts both the maturity date and the flavour.
For the best success with melons be sure you chose a melon with a maturity date that falls well between your average last spring frost and your average first fall frost. Melons are very frost sensitive.