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botanical name:
Parahebe perfoliata
Parahebe perfoliata © Deeproot Plant Base
common name:  Diggers Speedwell
synonyms:  Veronica perfoliata, Derwentia perfoliata
family:  Scrophulariaceae
characteristics: perennial, evergreen
height: 0.60m
width: 0.90m
growth rate: medium
growth habit: semi-prostrate
leaf colour: blue-green
flower colour: light blue
main season: Summer
aspect: full sun, part shade
conditions: dry soil, moist soil, sandy soil
preferred soil pH: any
minimum temp: -5°C
USDA zone: 9 to 10
description:
Sub-shrubby perennial of sprawling or arching habit, usually evergreen. Opposite, glaucoous, leathery, blue-green leaves that fused at the bases, so that they clasp and completely surround the stem. Terminal spikes of lavender-blue flower in late spring or early summer.

cultivation:
Needs a mild climate or location. Well drained, preferably sandy soils in full sun or part shade. Drought tolerant once established and good near the coast.
Trim after flowering to tidy. May re-shoot from the base if cut back by frosts.

propagation:
From seed or semi-ripe cutting in summer.

usage:
Raised beds, gravel or rock gardens, coastal gardens

other notes:
Native to Australia, mainly New South Wales and Victoria.

There is some debate about the correct genus name for this plant.

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