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From Chile and Argentina, this taller Sisyrinchium sports plentiful pretty pale yellow blooms the length of its many stalks. Sharp drainage is ideal for best growth but it does like consistently moist soil in full sun. Once leaves yellow, feel free to cut them back by half. They will spread over time and will lightly re-seed, so cut blooms off before seeds set if you want to limit this lovely but assertive flower. 1–2' T & WMinimum temperature: -20° F