Blue Garden Phlox
Phlox paniculata 'Blue'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
36 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8
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 'Blue' is a herbaceous perennial known for its vibrant blue flowers and strong upright stems. This cultivar is particularly noted for its striking color, which is less common among Phlox paniculata.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seeds into well-drained soil in early spring for best germination.
- Mist cuttings regularly to maintain humidity and promote root growth.
- Transplant seedlings after the last frost, spacing 18-24 inches apart.
- Water deeply once a week during dry spells to encourage healthy growth.
- Apply a balanced fertilizer in early spring and mid-summer for vibrant blooms.
- Mulch around the base to retain moisture and suppress weeds.
Pro Tip
Choose a sunny spot with well-draining soil for lush, abundant flowers.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist but not waterlogged 🌱
- Prune after flowering to encourage bushy growth
- Fertilize in early spring with a balanced fertilizer
- Mulch to conserve moisture and control weeds
Don't
- Avoid overwatering which can cause root rot ❌
- Don’t prune in late fall, wait until after blooming
- Refrain from planting in heavy, poorly-draining soil
- Avoid fertilizing late in the season to prevent weak growth
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
Blue Garden Phlox questions
What zones can Blue Garden Phlox grow in?
Blue Garden Phlox is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Blue Garden Phlox deer resistant?
Not reliably. Deer may browse Blue Garden Phlox, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Blue Garden Phlox bloom?
Blue 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 Blue Garden Phlox need full sun?
Blue Garden Phlox does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Phlox to compare
Garden Phlox
Phlox paniculata 'Mix'
Garden Phlox 'Rene Duval'
Phlox paniculata 'Rene Duval'
Prairie Phlox
Phlox pilosa
Creeping Phlox
Phlox subulata 'Candy Stripe'
Sherbet Cocktail Garden Phlox
Phlox paniculata 'Sherbet Cocktail'
Emerald Blue Moss Phlox
Phlox subulata 'Emerald Blue'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Blue 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.
