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Family: Asteraceae
(ass-ter-AY-see-ee) Genus: Echinops (EK-in-ops) Species: ritro (RIH-tro) Synonym:Echinops bannaticus Synonym:Echinops exaltatus
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Category PerennialsWater Requirements Drought-tolerant; suitable for xeriscapingAverage Water Needs; Water regularly; do not overwater Sun Exposure Sun to Partial ShadeFoliage Grown for foliageHerbaceous This plant is resistant to deer Foliage Color BronzeBlue-Green Height 24-36 in. (60-90 cm)Spacing 15-18 in. (38-45 cm)Hardiness USDA Zone 3a: to -39.9 °C (-40 °F)USDA Zone 3b: to -37.2 °C (-35 °F) USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) 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 N/ABloom Color Dark BlueBloom Characteristics This plant is attractive to bees, butterflies and/or birdsBloom Size UnknownBloom Time Late Summer/Early FallOther details UnknownSoil pH requirements 5.1 to 5.5 (strongly acidic)5.6 to 6.0 (acidic) Patent Information Non-patentedPropagation Methods By dividing rhizomes, tubers, corms or bulbs (including offsets)From seed; direct sow outdoors in fall From seed; winter sow in vented containers, coldframe or unheated greenhouse From seed; stratify if sowing indoors From seed; sow indoors before last frost Self-sows freely; deadhead if you do not want volunteer seedlings next season Seed Collecting Bag seedheads to capture ripening seedAllow seedheads to dry on plants; remove and collect seeds |