Trees and shrubs

Japanese spirea 'Neon Flash'

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Hardiness Zone 3

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Japanese spirea 'Neon Flash'

FamilyRosaceae

Spiraea japonica ‘Neon Flash’ is a compact summer spirea renowned for its intensely vibrant magenta-pink blooms. This deciduous shrub develops a rounded, dense habit, slightly wider than tall, making it ideal for borders, colorful mass plantings, and foundation plantings. In summer, its large corymbs of bright pink flowers create a sustained luminous effect that actively attracts pollinators. Its dark green foliage offers a striking contrast to the flowers and sometimes takes on a slight reddish tint in autumn. Easy to care for and very hardy, Spiraea japonica ‘Neon Flash’ prefers well-drained soil and a sunny exposure to maximize floral abundance. It is an excellent choice for enlivening northern landscapes with color and vigor.

Spiraea japonica 'Neon Flash'

Soil and care

The rightconditions.

Fertilization Slow-release fertilizer 14-7-14 or 4-2-8. Fertilize monthly or as directed on the bag. Add Myke at planting.

Bloom and dimensions

The completeprofile.

Bloom periodSummer
Flower colorRed
Foliage colorGreen
Foliage typeObsolete
FruitingDried fruits are not abundant.
Maximum height80 to 100 cm (31 to 39 inches)
Maximum width1.2 m (4 feet)
Growth ratefast
Hardiness zoneZone 3
Minimum temperature'-40°C