Convert any numeric values to characters using the num2str function. Use disp to display the string. Use sprintf to create a string, and then display it with disp. Use fprintf to directly display the string without creating a variable.
Watermelons need a long growing season (at least 80 days) and warm ground for seeds to germinate and grow. Soil should be 70 degrees F or warmer at planting time. Sow seeds 1 inch deep and keep well watered until germination.
If you have a seedless watermelon type, you'll need to plant a seeded type nearby that blossoms at the same time for proper pollination and fruit set. Watermelons should be watered deeply, about 1 to 2 inches per week, as well as more during a drought or high heat. Be consistent especially during fruit development.