Gros Bleu
Lavandula x intermedia – French Hybrid Lavender
Bloom color: Medium to dark shades of violet
Growing zones: 5-11
Culinary: No
Fragrance: Strong, but slightly sweeter than Grosso. Less camphor than Grosso
Can transplant: While small, mature plants may struggle
Bloom period: Mid / late July to mid August (northern Michigan)
Location: Aunt Rose

Photo source: High Country Gardens