Snapdragon Potomac White, also known as Antirrhinum majus, is a stunning cut flower snapdragon variety originating from China . This series was developed to excel in greenhouse and field production during the long days and high light levels of late spring and summer . These upright plants produce tall, sturdy stems reaching 39 to 60 inches in height and provide long, high-quality flower spikes.
Potomac White Selling Tips
Sell Snapdragon Potomac White to cut-flower enthusiasts looking for professional-grade stems for their arrangements . These plants are top performers during warm periods with high light, ensuring reliable blooms when other varieties might struggle . Customers will appreciate the exceptionally tall, strong stems and the vivid white saturation of the flower spikes.
General Growing Tips For Your Seedling Tray
Maintain consistent moisture levels but ensure the soil is well-drained to protect the roots. Maintain a media pH of 5.5 to 6.0 and use a liquid feed program of 100 to 175 ppm N, being careful to avoid high ammonium levels as these plants are salt-sensitive . These Group 4 snapdragons require long days and high light levels with temperatures above 60°F at night and 65°F during the day .
Pinching
This plant does not require pinching as it is grown for its single, high-quality central flower spike . Pinching would encourage branching but would decrease the height and quality of the primary stem .
Spacing
In a production setting, plant these at a density of 10 to 12 plants per square foot, which is approximately 3 to 4 inches apart to ensure good air circulation and upright growth
Pests
You should regularly scout for aphids and thrips to protect your crop.
Disease
Snapdragon Potomac White can be prone to downy mildew, botrytis, rust, and powdery mildew . These diseases often flourish in high-humidity environments, so you can prevent issues by ensuring good airflow and allowing foliage to dry between waterings.
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.
Snapdragon Potomac White Quick Reference Guide
4 Inch crop time
8-10 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Summer, Fall
Color
White
Habit
Upright
Height
39-50 Inches
Light
Full Sun
Minimum Temp
60
Perennial Zone
-
Water Needs
Moderate
Patented Plant
No
Current
Availability
Current Availability
09-14-2026 (Week 38)
0
09-21-2026 (Week 39)
0
09-28-2026 (Week 40)
0
10-05-2026 (Week 41)
0
10-12-2026 (Week 42)
0
10-19-2026 (Week 43)
0
10-26-2026 (Week 44)
0
11-02-2026 (Week 45)
3,200
11-09-2026 (Week 46)
3,200
11-16-2026 (Week 47)
3,200
11-23-2026 (Week 48)
3,200
11-30-2026 (Week 49)
3,200
12-07-2026 (Week 50)
3,200
12-14-2026 (Week 51)
3,200
12-21-2026 (Week 52)
3,200
12-28-2026 (Week 53)
3,200
01-04-2027 (Week 01)
3,200
01-11-2027 (Week 02)
3,100
01-18-2027 (Week 03)
3,200
01-25-2027 (Week 04)
3,200
02-01-2027 (Week 05)
3,200
02-08-2027 (Week 06)
3,200
02-15-2027 (Week 07)
3,200
02-22-2027 (Week 08)
3,200
03-01-2027 (Week 09)
3,200
03-08-2027 (Week 10)
3,200
03-15-2027 (Week 11)
3,200
03-22-2027 (Week 12)
3,200
03-29-2027 (Week 13)
3,200
04-05-2027 (Week 14)
3,200
04-12-2027 (Week 15)
3,200
04-19-2027 (Week 16)
3,200
04-26-2027 (Week 17)
3,200
05-03-2027 (Week 18)
3,200
05-10-2027 (Week 19)
0
05-17-2027 (Week 20)
0
05-24-2027 (Week 21)
0
05-31-2027 (Week 22)
0
06-07-2027 (Week 23)
0
Snapdragon Potomac White, also known as Antirrhinum majus, is a stunning cut flower snapdragon variety originating from China . This series was developed to excel in greenhouse and field production during the long days and high light levels of late spring and summer . These upright plants produce tall, sturdy stems reaching 39 to 60 inches in height and provide long, high-quality flower spikes.
Potomac White Selling Tips
Sell Snapdragon Potomac White to cut-flower enthusiasts looking for professional-grade stems for their arrangements . These plants are top performers during warm periods with high light, ensuring reliable blooms when other varieties might struggle . Customers will appreciate the exceptionally tall, strong stems and the vivid white saturation of the flower spikes.
General Growing Tips For Your Seedling Tray
Maintain consistent moisture levels but ensure the soil is well-drained to protect the roots. Maintain a media pH of 5.5 to 6.0 and use a liquid feed program of 100 to 175 ppm N, being careful to avoid high ammonium levels as these plants are salt-sensitive . These Group 4 snapdragons require long days and high light levels with temperatures above 60°F at night and 65°F during the day .
Pinching
This plant does not require pinching as it is grown for its single, high-quality central flower spike . Pinching would encourage branching but would decrease the height and quality of the primary stem .
Spacing
In a production setting, plant these at a density of 10 to 12 plants per square foot, which is approximately 3 to 4 inches apart to ensure good air circulation and upright growth
Pests
You should regularly scout for aphids and thrips to protect your crop.
Disease
Snapdragon Potomac White can be prone to downy mildew, botrytis, rust, and powdery mildew . These diseases often flourish in high-humidity environments, so you can prevent issues by ensuring good airflow and allowing foliage to dry between waterings.
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.
Snapdragon Potomac White Quick Reference Guide
4 Inch crop time
8-10 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Summer, Fall
Color
White
Habit
Upright
Height
39-50 Inches
Light
Full Sun
Minimum Temp
60
Perennial Zone
-
Water Needs
Moderate
Patented Plant
No
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