When it arrives
Your plug tray
Pot 72-cell plugs into 4-inch pots or plant out after hardening off. Creeping phlox plugs can go straight into the ground 12 inches apart to knit into a mat. Keep moist until rooted.
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Luminary Prismatic Pink grown by our community
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- Mature height
- 34.0 in
- Mature spread
- 28.0 in
- Bloom
- Early-July – peak Late-July
- Fragrance
- Moderate
- Deer
- Susceptible
Lavender companion · grow guide
How to grow Luminary Prismatic Pink
Phlox · Phlox paniculata
Two very different plants: garden phlox (P. paniculata) is a tall summer bloomer that wants sun, rich moist soil and good air flow; creeping phlox (P. subulata) is a spring groundcover for sun and lean, well-drained soil.
Check my zone & planting dates
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Full sunLight
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Moderate waterAverage drainage
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pH 5.5–7.5Soil
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Zones 3a–8bHardiness
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34″ tall28″ wide
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SusceptibleDeer · rabbits susceptible
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Not known toxicPets
Huckleberry saysTell me where you grow and I’ll check if Luminary Prismatic Pink will thrive there.
Hardy in zones 3a–8b
Spring or early fall.
Your year with Luminary Prismatic Pink
JFMAMJJASOND
When to plant
Spring or early fall.
How deep
Plant at the same depth as in the plug or with the bare-root crown just at soil level.
Spacing
Garden phlox 18–24 inches for air flow; creeping phlox 12–18 inches for a mat.
Soil
Garden phlox: rich, moist loam. Creeping phlox: sandy or gravelly, well-drained soil. · pH 5.5–7.5
Fix-it tip: Add compost for garden phlox. For creeping phlox, add grit to heavy clay or plant on slopes and walls so it never stays wet.
Sun
Full sun (tolerates light part shade).
Garden phlox in shade gets more mildew and fewer flowers; creeping phlox blooms best in full sun.
Don’t give up on it
Is it alive? What spring looks like
Creeping phlox stays evergreen and flowers in early to mid-spring. Garden phlox emerges from the crown in mid-spring as reddish shoots and blooms in mid to late summer.
Spring
Creeping phlox blooms; thin garden phlox shoots.
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Summer
Garden phlox blooms; deadhead and watch for mildew.
Fall
Cut garden phlox to the ground.
Winter
Creeping phlox stays green; garden phlox dormant.
Watering
First season: Water weekly through the first summer.
After that: Garden phlox needs about an inch a week; water at the soil, not over leaves. Creeping phlox is drought tolerant once established.
Feeding
Garden phlox: compost plus a light balanced feed in spring. Creeping phlox: little to none.
Pruning & deadheading
Garden phlox: deadhead for more bloom; thin to 4–5 stems per clump in spring to reduce mildew. Creeping phlox: shear lightly after spring bloom.
Dividing
Garden phlox every 3–4 years in spring. Creeping phlox rarely; divide or root pieces after bloom.
Winter
Both are very cold hardy (P. paniculata zones 4–8; P. subulata zones 3–9). Cut garden phlox to the ground in fall to remove mildewed leaves.
Summer heat
Garden phlox gets powdery mildew in humid weather; mildew-resistant varieties help. Creeping phlox can brown in hot, wet summers.
White powder on leaves
Likely cause: Powdery mildew
What to do: Thin stems, water at the base, and plant resistant varieties
Stippled, pale leaves with webbing
Likely cause: Spider mites
What to do: Hose off undersides; water in drought
Creeping phlox mat dies in patches
Likely cause: Wet soil or heavy mulch
What to do: Improve drainage; keep mulch off the mat
Shoots nibbled to stubs
Likely cause: Rabbits or deer
What to do: Use fencing or repellents
Too wet or too dry?
Lower leaves yellowing and dropping means garden phlox is too dry; mushy, browning mats of creeping phlox mean wet soil.
Watch for
- Powdery mildew (garden phlox)
- Spider mites in hot, dry weather
- Phlox bug
- Rabbits and deer browsing
Pets & wildlife
ASPCA lists moss (creeping) phlox as non-toxic to dogs, cats and horses.
Deer: susceptible · Rabbits: susceptible
Finnegan saysStill not sure what’s wrong? Ask Plant Health — describe it or add a photo.
In a container
Good in pots · 2 gallon+
Creeping phlox spills over pot edges; compact garden phlox also works in large pots.
Indoors
Outdoor plant
Hardy perennials that need winter dormancy.
Winter chill
Best after a cold winter
Creeping phlox blooms in spring after winter cold; garden phlox often blooms the first summer.
Growing it on
Plugs from the tray
3–4 inch pots for 3–5 weeks, until roots hold the soil
Garden bed or a 2 gallon pot
Time to move up? Slide the plant out: if white roots wrap the outside of the soil, it’s ready for the next size.
Planting with lavender
Plant it near your lavender
Creeping phlox fits the edge of a sunny lavender bed with the same lean, well-drained soil. Garden phlox needs richer, moister soil, so grow it in a neighboring border.
Same bedNearbyIts own area
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