Thunbergia (more commonly known as Black-eyed Susan Vine) is a native of Tropical Africa. It is a vining seasonal bloomer that can reach a spread of 8 feet wide. With evergreen leaves and orange or yellow blooms, this perennial is the right choice for hanging baskets, cascading color for combination planters, and trellises. Thunbergia bloom in the late summer and early fall as the days shorten. Adding these to your summer program can produce early fall sales.
General Growing Tips For Your Rooted Cutting Liner
For best results with Thunbergia, we recommend using a constant feed program of 150-200 ppm N. Maintain a pH between 5.8 - 6.2.
Pinching
Pinching is recommended 5-10 days after transplantation.
Spacing
Hanging baskets should be spaced 18-24 inches. Space adequately to allow airflow and light penetration between the foliage of adjacent pots.
Height Control
Pinching is the best way to control height. An initial pinch is recommended, but additional pinching may be necessary to shape your final product.
Pests
Whiteflies, spider mites,and thrips are the biggest pest problems with Thunbergia.
Disease
Orange Black Eye Susan are not prone to many diseases, but watch for botrytis while the days are short. This grey rot is usually associated with wet or humid conditions. You can prevent botrytis by allowing the plant to dry out between waterings, allowing for good airflow in your greenhouse, and spacing to allow the sun to penetrate to the soil level. The most common chemicals used to treat botrytis are Medallion and Banrot. Use them as a drench according to each label’s instructions.
Planting Orange Black Eye Susan Liners
We recommend planting 4-5 starter plants per 10” basket. Use a well-drained soil in your baskets and plant your starter plants deep, allowing the ellepot to be completely covered by the soil. If you are planting 4” pots, 1 plant per pot should be sufficient if you have enough time. Plant it directly in the middle of your pot.
Pinchingis recommended 5-10 days after transplantation. A second pinch may be necessary depending on the size and shape of the final pot.
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.
Thunbergia Orange Black Eye Susan Quick Reference Guide
4 Inch crop time
4-5 Weeks
10 Inch crop time
8-10 Weeks
Bloom Period
Fall
Color
Orange
Habit
Vining
Height
36 inches
Light
Full Sun, Partial Shade
Minimum Temp
60
Perennial Zone
10-11
Water Needs
Moderate
Patented Plant
No
Current Availability
Current Availability
09-09-2024 (Week 37)
0
09-16-2024 (Week 38)
0
09-23-2024 (Week 39)
0
09-30-2024 (Week 40)
0
10-07-2024 (Week 41)
0
10-14-2024 (Week 42)
0
10-21-2024 (Week 43)
0
10-28-2024 (Week 44)
700
11-04-2024 (Week 45)
700
11-11-2024 (Week 46)
700
11-18-2024 (Week 47)
700
11-25-2024 (Week 48)
700
12-02-2024 (Week 49)
600
12-09-2024 (Week 50)
700
12-16-2024 (Week 51)
700
12-23-2024 (Week 52)
700
12-30-2024 (Week 01)
700
01-06-2025 (Week 02)
700
01-13-2025 (Week 03)
700
01-20-2025 (Week 04)
700
01-27-2025 (Week 05)
700
02-03-2025 (Week 06)
700
02-10-2025 (Week 07)
700
02-17-2025 (Week 08)
700
02-24-2025 (Week 09)
700
03-03-2025 (Week 10)
700
03-10-2025 (Week 11)
700
03-17-2025 (Week 12)
600
03-24-2025 (Week 13)
700
03-31-2025 (Week 14)
700
04-07-2025 (Week 15)
700
04-14-2025 (Week 16)
700
04-21-2025 (Week 17)
700
04-28-2025 (Week 18)
700
05-05-2025 (Week 19)
700
05-12-2025 (Week 20)
700
05-19-2025 (Week 21)
700
05-26-2025 (Week 22)
700
06-02-2025 (Week 23)
700
06-09-2025 (Week 24)
700
Thunbergia (more commonly known as Black-eyed Susan Vine) is a native of Tropical Africa. It is a vining seasonal bloomer that can reach a spread of 8 feet wide. With evergreen leaves and orange or yellow blooms, this perennial is the right choice for hanging baskets, cascading color for combination planters, and trellises. Thunbergia bloom in the late summer and early fall as the days shorten. Adding these to your summer program can produce early fall sales.
General Growing Tips For Your Rooted Cutting Liner
For best results with Thunbergia, we recommend using a constant feed program of 150-200 ppm N. Maintain a pH between 5.8 - 6.2.
Pinching
Pinching is recommended 5-10 days after transplantation.
Spacing
Hanging baskets should be spaced 18-24 inches. Space adequately to allow airflow and light penetration between the foliage of adjacent pots.
Height Control
Pinching is the best way to control height. An initial pinch is recommended, but additional pinching may be necessary to shape your final product.
Pests
Whiteflies, spider mites,and thrips are the biggest pest problems with Thunbergia.
Disease
Orange Black Eye Susan are not prone to many diseases, but watch for botrytis while the days are short. This grey rot is usually associated with wet or humid conditions. You can prevent botrytis by allowing the plant to dry out between waterings, allowing for good airflow in your greenhouse, and spacing to allow the sun to penetrate to the soil level. The most common chemicals used to treat botrytis are Medallion and Banrot. Use them as a drench according to each label’s instructions.
Planting Orange Black Eye Susan Liners
We recommend planting 4-5 starter plants per 10” basket. Use a well-drained soil in your baskets and plant your starter plants deep, allowing the ellepot to be completely covered by the soil. If you are planting 4” pots, 1 plant per pot should be sufficient if you have enough time. Plant it directly in the middle of your pot.
Pinchingis recommended 5-10 days after transplantation. A second pinch may be necessary depending on the size and shape of the final pot.
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.
Thunbergia Orange Black Eye Susan Quick Reference Guide
4 Inch crop time
4-5 Weeks
10 Inch crop time
8-10 Weeks
Bloom Period
Fall
Color
Orange
Habit
Vining
Height
36 inches
Light
Full Sun, Partial Shade
Minimum Temp
60
Perennial Zone
10-11
Water Needs
Moderate
Patented Plant
No
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