18 Sparkle Strawberries Junebearing.Late season. Sparkle strawberries are a classic favorite and have been a popular strawberry variety for over 60 years. Its flavor is unique. That is why it is widely considered the best strawberry variety for making jam or for freezing. It is an extremely vigorous variety that produces a high number of runners, so the strawberry bed must be monitored to ensure it doesn't get too thick. Sparkle strawberries are medium-sized and ripen mid-late season. Planting Sparkle with other earlier varieties extends the fresh fruit season. Strawberries from Sparkle plants are bright and deep red and have excellent flavor. Zone: 4-8.