Sweet Summer Red, also known as Garden Phlox or Phlox Paniculata, is a perennial flowering plant native to North America. Syngenta developed the Sweet Summer series for disease resistance and compact, well-branched growth. This cultivar offers a bushy, upright habit of 18-24" tall and 12-18" wide, with red flowers blooming from spring through summer. This plant attracts pollinators with fragrant blooms, flourishing in containers, combinations, and landscape borders with little more than a sunny location and regular water. Perennial in zone 4-9, Sweet Summer Red is an obvious low-maintenance addition to the landscape for any homeowner. For a spreading variety to use as a groundcover, try Phlox Red Wings.
Sweet Summer Red Selling Tips
Sell Sweet Summer Red to customers looking for a low-maintenance perennial for containers and landscape borders. This plant offers many benefits, including fragrant flowers and an upright habit. Garden Phlox provides a stunning show of color from spring through summer, flourishing in full sun with nothing more than regular water. This cultivar has superior disease resistance. Create an attractive landscape by growing this plant with Penstemon, Echinacea, Leucanthemum, Veronica, Daylily, and Peony.
Coach Your Customer
1. Space plants 12-18" apart in well-drained soil in a sunny location.
2. Water once a week or less often in rainy weather and more often in drought.
General Growing Tips For Your Rooted Cutting Liner
For best results with Sweet Summer Red, plant one rooted liner per 4- or 6-inch container or three per 10-inch basket. Use well-drained soil with a pH of 5.8-6.2, EC of 1.5-2.1 mS/cm (SME), temperatures of 76-78 daytime and 64-66 nighttime, and light feed (125-175 ppm N). This long-day plant requires at least 14 hours of light at 6,000-8,000 fc. This cultivar doesn't require bulking or vernalization. Pinch as needed and use B-Nine and Sumagic to control growth. You may see aphids, spider mites, whiteflies, and thrips. Powdery mildew can develop in overly wet conditions.
Flowering
Red flowers bloom from spring through summer.
Pinching
Pinch as needed.
Spacing
Space containers for adequate airflow around the base and foliage of each plant and to allow sunlight to penetrate to the soil level of each container.
Height Control
Use sprays of B-Nine at 2,500 ppm and Sumagic at 5 ppm to control growth.
Pests
You may see spider mites, whiteflies, thrips, and aphids.
Disease
Powdery mildew is the primary disease issue with Phlox. Root rot and Botrytis can also develop in overlly wet conditions. Take the following precautions for prevention. Water plants at the base in the morning so they can dry out before nightfall. Space plants to allow for sufficient airflow; horizontal airflow fans are also effective at preventing outbreaks. Use a spray of Strike, Systhane (Eagle), Pipron, Terraguard, or Heritage to prevent powdery mildew.
Planting Sweet Summer Red Liners
We recommend planting one rooted liner per 4- or 6-inch container and three per 10-inch container. Use a well-drained soil and completely bury the ellepot in the center or evenly spaced in the container.
Rooted Cuttings
Cuttings vary in size between different plant families. These rooted starter plants will arrive ready to be transplanted in to your final container. If they are to be used in a landscape application, you will need to establish them in a 4 inch pot or an 1801 before planting outside.
Phlox Sweet Summer Red Quick Reference Guide
4 Inch crop time
10-12 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Spring, Summer
Color
Red
Habit
Upright
Height
18-24 Inches
Light
Full Sun
Minimum Temp
55
Perennial Zone
4-9
Water Needs
Moderate
Patented Plant
Yes
Current Availability
Current Availability
06-16-2025 (Week 25)
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06-23-2025 (Week 26)
0
06-30-2025 (Week 27)
0
07-07-2025 (Week 28)
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07-14-2025 (Week 29)
0
07-21-2025 (Week 30)
0
07-28-2025 (Week 31)
0
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0
08-11-2025 (Week 33)
100
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0
08-25-2025 (Week 35)
0
09-01-2025 (Week 36)
400
09-08-2025 (Week 37)
700
09-15-2025 (Week 38)
700
09-22-2025 (Week 39)
700
09-29-2025 (Week 40)
700
10-06-2025 (Week 41)
700
10-13-2025 (Week 42)
700
10-20-2025 (Week 43)
700
10-27-2025 (Week 44)
700
11-03-2025 (Week 45)
700
11-10-2025 (Week 46)
700
11-17-2025 (Week 47)
100
11-24-2025 (Week 48)
1,000
12-01-2025 (Week 49)
1,100
12-08-2025 (Week 50)
100
12-15-2025 (Week 51)
300
12-22-2025 (Week 52)
300
12-29-2025 (Week 01)
500
01-05-2026 (Week 02)
600
01-12-2026 (Week 03)
700
01-19-2026 (Week 04)
700
01-26-2026 (Week 05)
700
02-02-2026 (Week 06)
700
02-09-2026 (Week 07)
700
02-16-2026 (Week 08)
0
02-23-2026 (Week 09)
0
03-02-2026 (Week 10)
0
03-09-2026 (Week 11)
0
Sweet Summer Red, also known as Garden Phlox or Phlox Paniculata, is a perennial flowering plant native to North America. Syngenta developed the Sweet Summer series for disease resistance and compact, well-branched growth. This cultivar offers a bushy, upright habit of 18-24" tall and 12-18" wide, with red flowers blooming from spring through summer. This plant attracts pollinators with fragrant blooms, flourishing in containers, combinations, and landscape borders with little more than a sunny location and regular water. Perennial in zone 4-9, Sweet Summer Red is an obvious low-maintenance addition to the landscape for any homeowner. For a spreading variety to use as a groundcover, try Phlox Red Wings.
Sweet Summer Red Selling Tips
Sell Sweet Summer Red to customers looking for a low-maintenance perennial for containers and landscape borders. This plant offers many benefits, including fragrant flowers and an upright habit. Garden Phlox provides a stunning show of color from spring through summer, flourishing in full sun with nothing more than regular water. This cultivar has superior disease resistance. Create an attractive landscape by growing this plant with Penstemon, Echinacea, Leucanthemum, Veronica, Daylily, and Peony.
Coach Your Customer
1. Space plants 12-18" apart in well-drained soil in a sunny location.
2. Water once a week or less often in rainy weather and more often in drought.
General Growing Tips For Your Rooted Cutting Liner
For best results with Sweet Summer Red, plant one rooted liner per 4- or 6-inch container or three per 10-inch basket. Use well-drained soil with a pH of 5.8-6.2, EC of 1.5-2.1 mS/cm (SME), temperatures of 76-78 daytime and 64-66 nighttime, and light feed (125-175 ppm N). This long-day plant requires at least 14 hours of light at 6,000-8,000 fc. This cultivar doesn't require bulking or vernalization. Pinch as needed and use B-Nine and Sumagic to control growth. You may see aphids, spider mites, whiteflies, and thrips. Powdery mildew can develop in overly wet conditions.
Flowering
Red flowers bloom from spring through summer.
Pinching
Pinch as needed.
Spacing
Space containers for adequate airflow around the base and foliage of each plant and to allow sunlight to penetrate to the soil level of each container.
Height Control
Use sprays of B-Nine at 2,500 ppm and Sumagic at 5 ppm to control growth.
Pests
You may see spider mites, whiteflies, thrips, and aphids.
Disease
Powdery mildew is the primary disease issue with Phlox. Root rot and Botrytis can also develop in overlly wet conditions. Take the following precautions for prevention. Water plants at the base in the morning so they can dry out before nightfall. Space plants to allow for sufficient airflow; horizontal airflow fans are also effective at preventing outbreaks. Use a spray of Strike, Systhane (Eagle), Pipron, Terraguard, or Heritage to prevent powdery mildew.
Planting Sweet Summer Red Liners
We recommend planting one rooted liner per 4- or 6-inch container and three per 10-inch container. Use a well-drained soil and completely bury the ellepot in the center or evenly spaced in the container.
Rooted Cuttings
Cuttings vary in size between different plant families. These rooted starter plants will arrive ready to be transplanted in to your final container. If they are to be used in a landscape application, you will need to establish them in a 4 inch pot or an 1801 before planting outside.
Phlox Sweet Summer Red Quick Reference Guide
4 Inch crop time
10-12 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Spring, Summer
Color
Red
Habit
Upright
Height
18-24 Inches
Light
Full Sun
Minimum Temp
55
Perennial Zone
4-9
Water Needs
Moderate
Patented Plant
Yes
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