90 days. This variety of melon was used in the 19th century for making preserves, candied citron, pies and more. The firm white flesh is not good for fresh eating but has many holiday uses in the kitchen. These are rock hard and keep for months. Citron type melons are the ancestors to domestic watermelons and still grow wild in Africa. These are very easy to grow as they resist almost everything. Huge vines; 10-lb. fruit have bright red seeds.