Agave AttenuataLife Cycle: Hardy perennial. Half hardy perennial.Height: 12 to 120 inches (30 to 300 cm).Native: Americas.Growing Region: Zones 3 to 10.Flowers: Middle of summer through to autumn.Flower Details: White, cream. Droopy. Soap like fragrance.Foliage: Evergreen. Rosettes. Sword-like. Sharp.Sow Outside: Seeds: Cover. Spring. Can be planted singly; between 18 to 60 inches (45 to 150 cm) depending upon species size.Sow Inside: Germination time: one month to one year. Temperature: 65 to 75°F (18 to 24°C). Towards the end of winter or the start of spring. Grow seedlings indoors for two years. Transplant outdoors in the spring, once night-time temperatures do not fall below 45°F (7°C).Requirements and Yucca Plant Care: Full sunlight. Good drainage. Can survive in dry and poor soils. Soil pH 5.5 to 7.5. Caution always wear protective, preferably chain mail or similar gloves when caring for Yucca Plants. Tidy leaves up to stop from becoming scruffy. Propagate: by planting offsets or from root cuttings.Miscellaneous: Leaves can be very sharp, think seriously about the safety of children and animals before growing yucca in the garden. Yucca plants bloom at night. The plants have mutualistic relationship with the Yucca moth, which acts as a pollinator and lays eggs in the Yucca plant. Other Lepidoptera that are attractive to these plants include the Yucca, Ursine and Strecker’s Giant Skipper. Red Yucca (Hesperaloe parvifolia) is not a true yucca, but is actually a member of the Agave family.