Penstemon Penstemon 'Sour Grapes'

Semi-evergreen perennial with tubular flowers in shades of purple and mauve. Flowers prolifically from midsummer until the first frosts.

• Type: perennial
• Sun: full sun
• Soil: well-drained
• Watering: moderate
• Height: about 70 cm
• Spread: about 45 cm
• Flowers: June-October