It's very perishable, so don't wait more than two days after getting it home to eat it. These are delicious melons, but it's hard to know when they're fully ripe. Unlike most other melons, a ripe Spanish melon will have a green rind and be firm at the blossom end. There are about 50 varieties of watermelon on the market. They all taste about the same, but they vary in size, flesh color, and in whether they are seeded or seedless.
Picnic melons are largest, while icebox melons are round and compact.
The rind should be heavy for its size, and free of bruises, soft spots, or cuts. Seeded watermelons should have dark brown or black seeds. To store, wrap watermelon slices loosely in plastic and refrigerate for up to two days. They taste like cantaloupe, but with firmer flesh.