Petunias are a classic hanging basket flower originally from South America. No spring program is complete without the vibrant colors petunias bring to your garden center display. With bigger flowers than calibrachoa, these plants can put on a show for your front display to attract customers inside. They work well in hanging baskets or as a flowering cascader in combination baskets.
General Growing Tips For Your Rooted Cutting Liner
For best results with Petunias, we recommend using a constant feed program of 250-300 ppm N with an E.C. between 1.5 - 1.8. Remember to leach periodically in order to prevent salt build up. Maintain a pH between 5.8 - 6.2.
Flowering
Petunias require high light intensity (full sun) for peak finishing. If you grow them in the shade, you will get stretching and lower bloom performance. For the long nights of the winter months, supplemental light is recommended.
Pinching
Pinchingis recommended 5-10 days after transplantation. A second pinch may be necessary depending on the size and shape of the final pot.
Spacing
Space pots adequately to allow for light penetration and airflow between foliage of adjacent pots. We recommend eight inches for 4” pots and twenty-four inches for 10” pots.
Height Control
Pinching and high light intensity are the best ways to control height. An initial pinch is recommended, but additional pinching may be necessary to shape your final product. Bonzi has been shown effective in 4” pot production.
Pests
Whiteflies, aphids, leafminers, and thrips are the biggest pest problems with Petunias.
Disease
Ray Black 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 Ray Black Liners
We recommend planting 4-5 starter plants per 10 inch 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.
Petunia Ray Black Quick Reference Guide
4 Inch crop time
6-8 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Fall, Spring, Summer
Color
Black
Habit
Trailing
Height
12 inches
Light
Full Sun
Minimum Temp
55
Perennial Zone
9-11
Water Needs
Moderate
Patented Plant
Yes
Current
Availability
Current Availability
02-09-2026 (Week 07)
0
02-16-2026 (Week 08)
0
02-23-2026 (Week 09)
0
03-02-2026 (Week 10)
0
03-09-2026 (Week 11)
18,865
03-16-2026 (Week 12)
29,300
03-23-2026 (Week 13)
32,800
03-30-2026 (Week 14)
25,800
04-06-2026 (Week 15)
23,000
04-13-2026 (Week 16)
36,000
04-20-2026 (Week 17)
4,500
04-27-2026 (Week 18)
8,200
05-04-2026 (Week 19)
10,900
05-11-2026 (Week 20)
12,100
05-18-2026 (Week 21)
12,600
05-25-2026 (Week 22)
12,600
06-01-2026 (Week 23)
12,500
06-08-2026 (Week 24)
12,700
06-15-2026 (Week 25)
2,200
06-22-2026 (Week 26)
2,100
06-29-2026 (Week 27)
1,800
07-06-2026 (Week 28)
2,200
07-13-2026 (Week 29)
1,800
07-20-2026 (Week 30)
2,200
07-27-2026 (Week 31)
1,800
08-03-2026 (Week 32)
2,200
08-10-2026 (Week 33)
2,200
08-17-2026 (Week 34)
2,200
08-24-2026 (Week 35)
2,200
08-31-2026 (Week 36)
2,200
09-07-2026 (Week 37)
2,200
09-14-2026 (Week 38)
2,200
09-21-2026 (Week 39)
2,200
09-28-2026 (Week 40)
2,200
10-05-2026 (Week 41)
2,200
10-12-2026 (Week 42)
2,200
10-19-2026 (Week 43)
2,200
10-26-2026 (Week 44)
2,200
11-02-2026 (Week 45)
2,200
11-09-2026 (Week 46)
0
Petunias are a classic hanging basket flower originally from South America. No spring program is complete without the vibrant colors petunias bring to your garden center display. With bigger flowers than calibrachoa, these plants can put on a show for your front display to attract customers inside. They work well in hanging baskets or as a flowering cascader in combination baskets.
General Growing Tips For Your Rooted Cutting Liner
For best results with Petunias, we recommend using a constant feed program of 250-300 ppm N with an E.C. between 1.5 - 1.8. Remember to leach periodically in order to prevent salt build up. Maintain a pH between 5.8 - 6.2.
Flowering
Petunias require high light intensity (full sun) for peak finishing. If you grow them in the shade, you will get stretching and lower bloom performance. For the long nights of the winter months, supplemental light is recommended.
Pinching
Pinchingis recommended 5-10 days after transplantation. A second pinch may be necessary depending on the size and shape of the final pot.
Spacing
Space pots adequately to allow for light penetration and airflow between foliage of adjacent pots. We recommend eight inches for 4” pots and twenty-four inches for 10” pots.
Height Control
Pinching and high light intensity are the best ways to control height. An initial pinch is recommended, but additional pinching may be necessary to shape your final product. Bonzi has been shown effective in 4” pot production.
Pests
Whiteflies, aphids, leafminers, and thrips are the biggest pest problems with Petunias.
Disease
Ray Black 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 Ray Black Liners
We recommend planting 4-5 starter plants per 10 inch 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.
Petunia Ray Black Quick Reference Guide
4 Inch crop time
6-8 Weeks
10 Inch crop time
10-12 Weeks
Bloom Period
Fall, Spring, Summer
Color
Black
Habit
Trailing
Height
12 inches
Light
Full Sun
Minimum Temp
55
Perennial Zone
9-11
Water Needs
Moderate
Patented Plant
Yes
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