Wash, hull, and halve the fresh strawberries.
Add the strawberries, sugar, and 1 cup of water to a blender and blend until smooth.
Strain the strawberry puree through a fine-mesh strainer if a smoother lemonade is desired.
Squeeze the fresh lemons until you have 1 cup of lemon juice.
Combine the strawberry mixture and lemon juice in a large pitcher.
Add the remaining 4 cups of cold water and stir thoroughly.
Taste and adjust the sweetness or tartness if needed.
Chill until cold or add ice immediately before serving.
Serve over ice with fresh strawberry slices, lemon slices, and optional mint.