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Family: Asteraceae
(ass-ter-AY-see-ee) Genus: Silybum (SIGH-lee-bum) Species: marianum (mar-ee-AH-num) Cultivar: Adriana
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Category BiennialsWater Requirements Average Water Needs; Water regularly; do not overwaterSun Exposure Full SunFoliage Grown for foliageDeciduous Good Fall Color Foliage Color UnknownHeight 4-6 ft. (1.2-1.8 m)Spacing 24-36 in. (60-90 cm)Hardiness USDA Zone 6a: to -23.3 °C (-10 °F)USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F) |
Where to Grow UnknownDanger Plant has spines or sharp edges; use extreme caution when handlingBloom Color White/Near WhiteBloom Characteristics This plant is attractive to bees, butterflies and/or birdsBloom Size UnknownBloom Time Late Spring/Early SummerMid Summer Other details May be a noxious weed or invasiveSoil pH requirements 6.6 to 7.5 (neutral)7.6 to 7.8 (mildly alkaline) Patent Information Non-patentedPropagation Methods From seed; direct sow outdoors in fallFrom seed; winter sow in vented containers, coldframe or unheated greenhouse From seed; sow indoors before last frost From seed; direct sow after last frost Self-sows freely; deadhead if you do not want volunteer seedlings next season Seed Collecting Collect seedhead/pod when flowers fade; allow to dryWear gloves to protect hands when handling seeds Properly cleaned, seed can be successfully stored |