Grow Zones: 2,3,4,5,6,7,8,9,10 Tested and packed on 01/19/2023, 94% Germ. Matthiolia night stock flowers open at night and emit a powerful perfume into the air. They can be identified by their pink and or purple color, their scent (featuring hints of clove), and by their 4 petaled flower heads. Companion plant annual Evening Scented Stock flowers alongside Sweet Alyssum. Another great idea is to put them in a hanging window planter by your bedroom. That way you'll be able enjoy the smell of the sweet perfume at night when you go to rest. Evening scented stock flowers grow 6-12 inches tall and grow well at a soil ph ranging from alkaline to neutral. They grow pretty fast (making the most of their 3 seasoned lifespan) and unlike some flower seeds, Matthiolia Perfume Plant seeds are easy to germinate. This makes them a great choice for beginner and professional gardeners alike. Take advantage of this bulk offer at an unbeatable deal for you today. Germination Instructions: Sow seeds 1/16th of an inch into the soil. Keep seeds and soil moist. Germination time is generally fast, in up to 14 days.