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Iris unguicularis 'Walter Butt'
© Deeproot Plant Base
common name: Algerian Iris
synonyms: Iris stylosa
perennial, evergreen, scented/aromatic
poisonous or irritant
dry soil, moist soil
preferred soil pH: neutral-alkaline
minimum temp: -18°C
USDA zone: 8 to 9
Large, strongly scented, pale, almost greyish, lavender-blue flowers, produced during winter. This is one of the earliest flowering cultivars, sometimes in late autumn. Tough grass like evergreen leaves
Thrives best in a sunny, well-drained position, even in poor dry conditions, such as the base of a south facing wall. Sharply drained neutral to alkaline soil.