Munstead Lavender Seeds. Lavandula angustifolia. 126 to 140 Days. Heirloom, Non-GMO, Open Pollinated. Perennial in Zones 5-9. 18 inches. A fragrant robust lavender that, due to its short size and tightly held blooms (about 8 inches), makes a great hedge. Approx 26,300 Seeds / Oz.