About
Agastache 'Summer Sky' is a compact, bushy perennial that reaches a height of up to 60 cm. It features ovate leaves that emit a pleasant aroma. From summer through autumn, it produces spikes adorned with whorls of small, tubular flowers in a violet-blue hue, complemented by darker calyces.
About the genus
Agastache consists of herbaceous perennials featuring straightforward, fragrant foliage and small tubular flowers with two lips, arranged in whorls that create compact spikes during the summer and autumn months. While some species may be somewhat tender, they can also be cultivated as annual bedding plants.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- South-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H3
Plant details
- Plant type
- Herbaceous Perennial
- Habit
- Bushy
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Gravel garden, Patio and container plants, Cottage and informal garden
- Fragrance
- Foliage
Care notes
- Cultivation
- Grows best in well-drained, fertile soils in full sun
- Pruning
- Remove spent flowering spikes through the season to prolong flowering
- Propagation
- Propagate by division or by semi-ripe cuttings
- Pest resistance
- Generally pest-free
- Disease resistance
- May be susceptible to powdery mildews