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Penstemon 'Sour Grapes' (Syn. Stapleford Gem)
Penstemon 'Sour Grapes' (Syn. Stapleford Gem): Purple-blue tubular flowers with a metallic sheen and patches of white in the throat. Protect from hard frosts. To 60cm.
Verbena bonariensis
Verbena bonariensis: Tall, airy but strong slender stems with flat heads of purple flowers in mid to late summer. To 1.8m. Frost-hardy. [Collect Only]

Found 2 matches:

Colour: Purple [ X ]
Soil: Dry [ X ]
Flowering: Mid Summer [ X ]
Type: Frost-hardy peren [ X ]

Height when grown

30cm to 60cm (1)
Over 1.2m (1)

Aspect

Part-shade (1)
Sun (2)

Spread Rate

Moderate (1)
Slow (1)