Purple
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Agastache foeniculum (Anise Hyssop)
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Agastache rugosa ‘Little Adder’ (Anise Hyssop)
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Agastache x ‘Blue Boa’ (Anise Hyssop)
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Agastache x Beelicious® Purple ‘Agapd’ (Anise Hyssop)
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Allium atropurpureum (Ornamental Onion)
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Allium christophii (Star of Persia)
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Allium giganteum (Ornamental Onion)
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Allium hollandicum ‘Purple Sensation’ (Ornamental Onion)
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Allium schubertii (Ornamental Onion)
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Allium x ‘Ambassador’ (Ornamental Onion)
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Allium x ‘Gladiator’ (Ornamental Onion)
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Allium x ‘Globemaster’ (Ornamental Onion)