Trees and shrubs

Japanese Spiraea 'Neon Flash'

Japanese spiraea

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Exposure
Sun in partial shade
Hardiness
Zone 3

Discover the plant

Common nameJapanese Spiraea
FamilyRosaceae
GenusSpiraea
Speciesjaponica
CultivarNeon Flash
TypeShrub
Botanical nameJapanese spiraea

Japanese Spirea ‘Neon Flash’ (Spiraea japonica ‘Neon Flash’). Spiraea japonica ‘Neon Flash’ is a compact summer spirea known for the intensity of its vibrant magenta-pink bloom. This deciduous shrub develops a rounded, dense habit, slightly wider than tall, ideal for borders, colorful beds, 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 stark contrast to the blooms and sometimes takes on a slight reddish tint in autumn.

To plant Japanese Spirea ‘Neon Flash’, choose an appropriate exposure: sun to partial shade. The recommended soil is: well-drained, tolerant of various soil types. Water the root ball before planting and ensure water can drain after planting. During establishment, check the soil moisture by hand before watering again. Spread mulch around the base, leaving the crown clear. Avoid systematic fertilizer applications without considering the soil's richness. In Quebec, choose a period when the ground is thawed and easy to work.

Allow for a width of 1.2 m (4 ft) when planning this plant's placement in the garden. The indicated height of 90 cm (3 ft) helps in choosing its position relative to neighboring plants. Maintain access to the base to weed, check moisture, and remove damaged parts. Combine this variety with plants whose light and water needs are compatible. If you are considering a container, first check that its volume and drainage are suitable for root development. Potted roots are more exposed to cold than those planted in the ground.

Spirée du Japon ‘Neon Flash’ (Spiraea japonica)

Soil and care

The right care,at the right time.

Minimum temperature

'-40°C

Watering

Moderate watering

Soil type

Neutral to slightly acidic, well drained

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

Its place,in your garden.

Mature height

80 to 100 cm (31 to 39 inches)

Width / spread

1.2 m (4 feet)

Flower color

Red

Foliage color

Green

Foliage type

Obsolete

Growth rate

fast

Growth habit

Rounded and dense

Bloom period

Summer

Fruiting

Dried fruits are not abundant.

Wildlife and pets

Life,around your plants.

Supporting wildlife

Yes