Light
Full sun for the most bloom.
Growing guide · Shrubs
Spiraea japonica
How to grow Japanese Spirea 'Neon Flash'.
Hot pink flat-tops, all summer.
- Light
- Full sun, part sun
- Water
- Moderate
- Zones
- 4–9
- Size
- 3–4 ft tall and wide
- Spacing
- 3–4 ft apart.
- Pets
- Not on the ASPCA pet-safe list; keep it out of reach
Water
Water regularly the first season; drought tolerant after.
Planting and soil
Plant spring or fall at pot depth.
Feeding
Light shrub fertilizer in spring.
Pruning
Blooms on new wood. Cut back by a third in late winter; shear after the first flush for rebloom.
Through the year
Reddish new growth in spring. Blooms June–July, rebloom into late summer.
If something's off
Japanese spirea can self-seed and is listed as invasive in some eastern states; deadheading limits seed.
Plays well with
Plant it with friends.
Why we stock it: Reliable summer color in a hardy shrub that fits foundations and borders.
That's everything we know about growing it. Thanks for reading.
Know someone with the right spot? Send them this.
Japanese Spirea 'Neon Flash'from $57.99 · Arrives alive, or we replace it
The Sunday Tip · every SundayThe Sunday Tip · you're on the list
One good plant idea,
every Sunday.
You're in.
See you Sunday.
What to plant this week in your zone, every Sunday. New ways to plant and odd tricks that actually work.
Sunday's tip is written for your zone: what to plant this week, and a kit that fits.Set your zone and Sunday's tip gets specific: what to plant this week, and a kit that fits.
Patio pot kit
Balcony Brag
Forty square feet, big opinions.
4 plants · $165.92In a pot, any zone
See the kit →
Deer-resistant border kit
Deer Can't Even
Everything in it tastes terrible to deer.
12 plants · $392.88Zones 5–8
See the kit →
Office kit
The Desk Set
Three small plants, one desk.
3 plants · $45Indoors, any zone
See the kit →
Drought garden kit
The Hot, Dry Bank
For the slope the hose doesn't reach.
14 plants · $554.86Zones 5–9
See the kit →
Pollinator garden kit
The Pollinator Buffet
Open seating for bees, butterflies and hummingbirds.
14 plants · $424.86Zones 4–9
See the kit →
Shade garden kit
Shade Layers
For the spot the sun forgot.
8 plants · $151.92Zones 3–9
See the kit →
Edible kit · plant this fall
The Snack Garden
Pick it, eat it, walk away.
4 plants · $199.80Zones 5–10
See the kit →
All plant kits →