Garden Phlox
Phlox paniculata 'Backlight'
Essentials
At a Glance
Plant Type
Perennial
Height
36 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Prefers moderate humidity
Lifespan
Perennial
Native To
North America
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Phlox paniculata is an upright herbaceous perennial known for its sturdy stems, lance-shaped green leaves, and large, domed clusters (panicles) of fragrant, tubular flowers that bloom from mid-summer to early fall. 'Backlight' is a standout cultivar featuring pure, brilliant white flowers with a tiny yellow eye. It is noted for its strong, upright habit, long bloom period, and excellent resistance to powdery mildew.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seedlings or divisions into prepared soil in early spring.
- Water thoroughly after planting to settle soil around roots.
- Mulch around the base to retain moisture and suppress weeds.
- Fertilize with a balanced fertilizer in early spring and mid-summer.
- Prune back spent flower stalks mid-summer for continuous bloom.
- Divide every 3-4 years in early spring or fall for vigor.
Pro Tip
Plant in well-draining soil with good air circulation for best results.
Keep It Thriving
Care Guide
Do
- Water regularly during dry spells 🌱
- Prune dead or faded flowers to encourage new blooms
- Fertilize annually with organic compost
Don't
- Avoid overwatering to prevent root rot ❌
- Do not bury crown deep in soil
- Refrain from heavy pruning in late fall
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Pest Check | ||||||||||||
| Stake |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Garden Phlox questions
What zones can Garden Phlox grow in?
Garden Phlox is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Garden Phlox deer resistant?
Not reliably. Deer may browse Garden Phlox, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Garden Phlox bloom?
Garden Phlox typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Garden Phlox need full sun?
Garden Phlox does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
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Keep exploring
Explore the genus
Collections featuring this plant
Grow Garden Phlox with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
