Diascia Trinity Sunset, (also known as Twinspur) is a flower that is native to southern Africa.
It is an upright bushing type that blooms April-first frost.
This Diascia is grown as a perennial in zones 8-10, and is tolerant to weather and full sun.
It has medium-large red-orange flowers that grow all over the stem.
Use these plants in hanging baskets, containers, and borders.
Try pairing Trinity Sunset with
Nemesia Nesia Snow Angel,
Osteospermum,
and annual violas.
Another benefit of Diascia is that they are deer resistant and attract butterflies.
Trinity Sunset Selling Tips
Sell Trinity Sunset to your customers who want to add some stunning color to their borders or front porch without adding lots of work to their gardening routines. Trinity Sunset blooms spring-fall and offers great weather tolerance, medium-large red-orange flowers, and low-maintenance care. Many homeowners look for an easy way to add color to their front porch or walkway border and Trinity Sunset is a fantastic choice. It does well with average soil in full sun or partial shade, in hanging baskets, containers, or in landscape borders. It isn't affected by any significant pests or diseases.
Coach your customer:
Plant in containers one gallon or larger, 2-3 plants per 10" container; or in landscape borders, 12-18 inches apart.
In hot climates, Diascia may stop blooming midsummer. Cut back the plant to encourage continued blooming through fall.
Trim the plant to control size. Deadhead spent blooms to promote continued flowering.
General Growing Tips For Your Rooted Cutting Liner
To achieve the best results with Trinity Sunset, plant in average to fertile soil in full sun or partial shade with 100-150 ppm weekly and a pH of 5.6-6.2. Plant one plug per 4 inch pot, or 3 plants per 1 gallon container. We recommend spacing containers 5-8 inches apart for airflow and light penetration. Deadhead to encourage continuous blooming, and, in extremely hot climates, cut back in midsummer when Trinity Sunset stops blooming to encourage reblooming when the weather cools. No major pests or diseases affect Diascia.
Flowering
Trinity Sunset flowers spring-fall. In extremely hot summer climates, Diascia may slow or stop blooming in mid-summer. To encourage a fall bloom, cut back the flowers during this summer heat. Use slow-release fertilizer on planting, or fertilize 100-150 ppm weekly.
Pinching
We recommend that you pinch Trinity Sunset once, about 10 days after transplanting to your final container (to allow roots time to establish).
Deadhood blooms to encourage continuous flowering.
Spacing
We recommend spacing 4 inch pots 5-8 inches apart for airflow and light penetration. For gallon production, space plants 8-12 inches apart.
Height Control
Plant growth regulators are optional for Diascia, but not necessary under high light intensities. Use 1-3 sprays of ALAR (B-Nine) 2 gr/L according to required plant size.
Diascia does not tend to stretch tall. Cut back stems to shape as needed.
Pests
Aphids and whiteflies are the primary problem pests with Diascia.
Disease
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 Trinity Sunset Liners
We recommend 1 starter plant per 4 inch pot or 1801, or 3 starter plants evenly spaced in a 1-2 gallon container. Use a well-drained soil in your pots and plant your liner deeply directly in the middle of your pot. Cover the ellepot completely with soil..
One pinch about 10 days after transplanting to your final container should be sufficient.
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.
Diascia Trinity Sunset Quick Reference Guide
4 Inch crop time
5-7 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Fall
Color
Red, Orange
Habit
Mounding, Upright
Height
12 inches
Light
Full Sun
Minimum Temp
52
Perennial Zone
8-11
Water Needs
Moderate
Patented Plant
Yes
Current Availability
Current Availability
03-17-2025 (Week 12)
0
03-24-2025 (Week 13)
0
03-31-2025 (Week 14)
0
04-07-2025 (Week 15)
0
04-14-2025 (Week 16)
0
04-21-2025 (Week 17)
1,400
04-28-2025 (Week 18)
1,500
05-05-2025 (Week 19)
1,600
05-12-2025 (Week 20)
1,400
05-19-2025 (Week 21)
1,400
05-26-2025 (Week 22)
1,600
06-02-2025 (Week 23)
1,600
06-09-2025 (Week 24)
1,600
06-16-2025 (Week 25)
0
06-23-2025 (Week 26)
0
06-30-2025 (Week 27)
0
07-07-2025 (Week 28)
0
07-14-2025 (Week 29)
0
07-21-2025 (Week 30)
0
07-28-2025 (Week 31)
0
08-04-2025 (Week 32)
0
08-11-2025 (Week 33)
0
08-18-2025 (Week 34)
0
08-25-2025 (Week 35)
0
09-01-2025 (Week 36)
0
09-08-2025 (Week 37)
0
09-15-2025 (Week 38)
0
09-22-2025 (Week 39)
0
09-29-2025 (Week 40)
0
10-06-2025 (Week 41)
0
10-13-2025 (Week 42)
0
10-20-2025 (Week 43)
0
10-27-2025 (Week 44)
0
11-03-2025 (Week 45)
0
11-10-2025 (Week 46)
0
11-17-2025 (Week 47)
700
11-24-2025 (Week 48)
1,500
12-01-2025 (Week 49)
2,500
12-08-2025 (Week 50)
3,200
Diascia Trinity Sunset, (also known as Twinspur) is a flower that is native to southern Africa.
It is an upright bushing type that blooms April-first frost.
This Diascia is grown as a perennial in zones 8-10, and is tolerant to weather and full sun.
It has medium-large red-orange flowers that grow all over the stem.
Use these plants in hanging baskets, containers, and borders.
Try pairing Trinity Sunset with
Nemesia Nesia Snow Angel,
Osteospermum,
and annual violas.
Another benefit of Diascia is that they are deer resistant and attract butterflies.
Trinity Sunset Selling Tips
Sell Trinity Sunset to your customers who want to add some stunning color to their borders or front porch without adding lots of work to their gardening routines. Trinity Sunset blooms spring-fall and offers great weather tolerance, medium-large red-orange flowers, and low-maintenance care. Many homeowners look for an easy way to add color to their front porch or walkway border and Trinity Sunset is a fantastic choice. It does well with average soil in full sun or partial shade, in hanging baskets, containers, or in landscape borders. It isn't affected by any significant pests or diseases.
Coach your customer:
Plant in containers one gallon or larger, 2-3 plants per 10" container; or in landscape borders, 12-18 inches apart.
In hot climates, Diascia may stop blooming midsummer. Cut back the plant to encourage continued blooming through fall.
Trim the plant to control size. Deadhead spent blooms to promote continued flowering.
General Growing Tips For Your Rooted Cutting Liner
To achieve the best results with Trinity Sunset, plant in average to fertile soil in full sun or partial shade with 100-150 ppm weekly and a pH of 5.6-6.2. Plant one plug per 4 inch pot, or 3 plants per 1 gallon container. We recommend spacing containers 5-8 inches apart for airflow and light penetration. Deadhead to encourage continuous blooming, and, in extremely hot climates, cut back in midsummer when Trinity Sunset stops blooming to encourage reblooming when the weather cools. No major pests or diseases affect Diascia.
Flowering
Trinity Sunset flowers spring-fall. In extremely hot summer climates, Diascia may slow or stop blooming in mid-summer. To encourage a fall bloom, cut back the flowers during this summer heat. Use slow-release fertilizer on planting, or fertilize 100-150 ppm weekly.
Pinching
We recommend that you pinch Trinity Sunset once, about 10 days after transplanting to your final container (to allow roots time to establish).
Deadhood blooms to encourage continuous flowering.
Spacing
We recommend spacing 4 inch pots 5-8 inches apart for airflow and light penetration. For gallon production, space plants 8-12 inches apart.
Height Control
Plant growth regulators are optional for Diascia, but not necessary under high light intensities. Use 1-3 sprays of ALAR (B-Nine) 2 gr/L according to required plant size.
Diascia does not tend to stretch tall. Cut back stems to shape as needed.
Pests
Aphids and whiteflies are the primary problem pests with Diascia.
Disease
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 Trinity Sunset Liners
We recommend 1 starter plant per 4 inch pot or 1801, or 3 starter plants evenly spaced in a 1-2 gallon container. Use a well-drained soil in your pots and plant your liner deeply directly in the middle of your pot. Cover the ellepot completely with soil..
One pinch about 10 days after transplanting to your final container should be sufficient.
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.
Diascia Trinity Sunset Quick Reference Guide
4 Inch crop time
5-7 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Fall
Color
Red, Orange
Habit
Mounding, Upright
Height
12 inches
Light
Full Sun
Minimum Temp
52
Perennial Zone
8-11
Water Needs
Moderate
Patented Plant
Yes
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