Lathyrus Mammoth Deep Rose, also known as Lathyrus odoratus, is a vigorous climbing annual originally native to the Mediterranean region. Developed specifically for the professional cut flower industry, the Mammoth series is highly valued for its large, ruffled blooms and exceptionally long, sturdy stems. These robust vines can reach a mature height of 60 to 84 inches with support, producing an abundance of fragrant, deep rose-colored flowers from late spring through early summer. They perform best in full sun and rich, well-drained soil, making them a staple for vertical garden displays and premium spring arrangements. For a high-impact floral display, consider pairing Deep Rose with companions like white snapdragons or larkspur.
Mammoth Deep Rose Selling Tips
Sell Mammoth Deep Rose to customers looking for nostalgic fragrance and dramatic verticality for their early spring gardens. This professional-tier series is highly prized because it is less sensitive to day length, resulting in earlier harvests and superior stem quality compared to other varieties. Gardeners will love the romantic appeal of these vibrant rose vines climbing garden obelisks, while florists will prioritize the large flower size and sweet scent for bridal bouquets. Remind your customers that frequent harvesting of the blooms actually stimulates the plant to produce more stems, providing them with weeks of fragrant indoor displays.
Coach Your Customer Select a sunny planting site with rich, fertile soil as soon as the ground can be worked in early spring, as these plants thrive in cool temperatures. Provide a sturdy trellis, fence, or netting immediately after planting to support the rapid upward growth of the climbing vines. Apply a layer of mulch around the base of the plants and maintain consistent moisture to keep the root systems cool as the weather warms up. Pick the flowers often; removing stems for bouquets encourages the plant to continue producing new buds throughout the season. These are cool-season annuals that will naturally decline once the intense heat of mid-to-late summer arrives.
General Growing Tips For Your Seedling Tray
For high-quality professional production, plant one rooted liner per 4-inch pot or three liners per 10-inch container to create a full retail product. Maintain a media pH between 6.0 and 7.0 and provide a balanced constant fertilizer feed of 150 to 200 ppm Nitrogen. Sweet peas must be finished cool, with daytime temperatures of 55–65°F and night temperatures of 45–50°F, to ensure thick stems and prevent flower bud drop. Although the Mammoth series is bred for early flowering and reduced day-length sensitivity, high light levels are still essential for crop quality. Expect a finishing time of 6 to 8 weeks for 4-inch pots and 8 to 10 weeks for larger containers. Watch for common pests like aphids and spider mites, as well as diseases including powdery mildew and botrytis.
Pinching
Growers should pinch the plants once they reach 4 to 6 inches in height to stimulate basal branching and significantly increase the total flower yield.
Spacing
For professional cut flower fields, space plants 6 to 12 inches apart. Because of their vigorous climbing habit, you must provide mechanical support, such as 6-foot tall netting or wire trellises, to keep stems straight and prevent tangling.
Pests
Regularly scout for aphids, thrips, and spider mites, which can damage the tender foliage and buds.
Disease
Powdery mildew and botrytis are the most frequent concerns, especially during periods of high humidity.
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.
Lathyrus Mammoth Deep Rose Quick Reference Guide
4 Inch crop time
6-8 Weeks
10 Inch crop time
8-10 Weeks
Bloom Period
Spring, Summer
Color
deep rose
Habit
Upright
Height
5-7 Feet
Light
Full Sun
Minimum Temp
45
Perennial Zone
-
Water Needs
Moderate
Patented Plant
No
Current
Availability
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0
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4,200
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4,200
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4,200
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4,200
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4,200
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4,200
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4,200
12-21-2026 (Week 52)
4,200
12-28-2026 (Week 53)
4,200
01-04-2027 (Week 01)
4,200
01-11-2027 (Week 02)
4,200
01-18-2027 (Week 03)
4,200
01-25-2027 (Week 04)
4,200
02-01-2027 (Week 05)
4,200
02-08-2027 (Week 06)
4,200
02-15-2027 (Week 07)
4,200
02-22-2027 (Week 08)
4,200
03-01-2027 (Week 09)
4,100
03-08-2027 (Week 10)
4,200
03-15-2027 (Week 11)
4,200
03-22-2027 (Week 12)
4,200
03-29-2027 (Week 13)
4,200
04-05-2027 (Week 14)
4,200
04-12-2027 (Week 15)
4,200
04-19-2027 (Week 16)
4,200
04-26-2027 (Week 17)
0
05-03-2027 (Week 18)
0
05-10-2027 (Week 19)
0
Lathyrus Mammoth Deep Rose, also known as Lathyrus odoratus, is a vigorous climbing annual originally native to the Mediterranean region. Developed specifically for the professional cut flower industry, the Mammoth series is highly valued for its large, ruffled blooms and exceptionally long, sturdy stems. These robust vines can reach a mature height of 60 to 84 inches with support, producing an abundance of fragrant, deep rose-colored flowers from late spring through early summer. They perform best in full sun and rich, well-drained soil, making them a staple for vertical garden displays and premium spring arrangements. For a high-impact floral display, consider pairing Deep Rose with companions like white snapdragons or larkspur.
Mammoth Deep Rose Selling Tips
Sell Mammoth Deep Rose to customers looking for nostalgic fragrance and dramatic verticality for their early spring gardens. This professional-tier series is highly prized because it is less sensitive to day length, resulting in earlier harvests and superior stem quality compared to other varieties. Gardeners will love the romantic appeal of these vibrant rose vines climbing garden obelisks, while florists will prioritize the large flower size and sweet scent for bridal bouquets. Remind your customers that frequent harvesting of the blooms actually stimulates the plant to produce more stems, providing them with weeks of fragrant indoor displays.
Coach Your Customer Select a sunny planting site with rich, fertile soil as soon as the ground can be worked in early spring, as these plants thrive in cool temperatures. Provide a sturdy trellis, fence, or netting immediately after planting to support the rapid upward growth of the climbing vines. Apply a layer of mulch around the base of the plants and maintain consistent moisture to keep the root systems cool as the weather warms up. Pick the flowers often; removing stems for bouquets encourages the plant to continue producing new buds throughout the season. These are cool-season annuals that will naturally decline once the intense heat of mid-to-late summer arrives.
General Growing Tips For Your Seedling Tray
For high-quality professional production, plant one rooted liner per 4-inch pot or three liners per 10-inch container to create a full retail product. Maintain a media pH between 6.0 and 7.0 and provide a balanced constant fertilizer feed of 150 to 200 ppm Nitrogen. Sweet peas must be finished cool, with daytime temperatures of 55–65°F and night temperatures of 45–50°F, to ensure thick stems and prevent flower bud drop. Although the Mammoth series is bred for early flowering and reduced day-length sensitivity, high light levels are still essential for crop quality. Expect a finishing time of 6 to 8 weeks for 4-inch pots and 8 to 10 weeks for larger containers. Watch for common pests like aphids and spider mites, as well as diseases including powdery mildew and botrytis.
Pinching
Growers should pinch the plants once they reach 4 to 6 inches in height to stimulate basal branching and significantly increase the total flower yield.
Spacing
For professional cut flower fields, space plants 6 to 12 inches apart. Because of their vigorous climbing habit, you must provide mechanical support, such as 6-foot tall netting or wire trellises, to keep stems straight and prevent tangling.
Pests
Regularly scout for aphids, thrips, and spider mites, which can damage the tender foliage and buds.
Disease
Powdery mildew and botrytis are the most frequent concerns, especially during periods of high humidity.
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.
Lathyrus Mammoth Deep Rose Quick Reference Guide
4 Inch crop time
6-8 Weeks
10 Inch crop time
8-10 Weeks
Bloom Period
Spring, Summer
Color
deep rose
Habit
Upright
Height
5-7 Feet
Light
Full Sun
Minimum Temp
45
Perennial Zone
-
Water Needs
Moderate
Patented Plant
No
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