Description
The flower with the power!
Reduced Risk: Extreme disease resistance provides season-long flowering for landscape plantings. Screened against 36 contemporary strains of aerial Phytophthora, including ten of the most virulent that cause Phytophthora blight on annual vinca.1
Easier to grow: Excellent branching, uniformity, and flower quality make Cora XDR the ideal choice from premium packs and small pots to large containers.
Higher consumer appeal: Large showy flowers in the widest range of solid and bicolor patterns of any disease-resistant vinca on the market.
1 Confirmed in collaboration with Clemson University; these isolates were found at grower facilities and in landscapes across the southern U.S.
Features
Growing information
Culture Information
Cora® XDR Vinca
Catharanthus roseus
Product form: Seed
Containers: Packs, Pints, Quarts, Gallons
Habit: Upright
Garden Specifications
Garden height: 14–16" (35–40 cm) tall
Garden width: 18–20" (45–50 cm) wide
Exposure: Full Sun
USDA zone: 11
AHS zone: 12–1
Product use: Packs, Containers, Landscapes, Patio Pots, Combos
Cora® XDR
Disease resistance information: Cora® XDR vinca is screened against 36 contemporary strains of Phytophthora nicotianae, including ten of the most virulent that cause Phytophthora blight on annual vinca, confirmed in collaboration with Clemson University and in independent trials across North America. However, they are not immune to the disease. For this reason, we highly recommend chemical rotations as a responsible and critical part of a disease resistance maintenance program. Applications are also advised to control several other diseases that can infect vinca, such as Thielaviopsis, Rhizopus, Rhizoctonia, Pythium and Tospovirus (INSV and TSWV).
Germination
Germination time: 7–8 days
Media temperature: 76–78 °F (24–25 °C)
Chamber: Optional
Light: Required for germination
Seed cover: Yes
Seeds per cell: 1
Moisture level: 5 - SATURATED: Soil is dark brown and shiny, free water is present at the surface of the soil, water drips freely from the bottom of the tray, and trays are heavy with a visible bend in the middle.
Young Plant Production
Recommended tray size: 288-cell tray
Plug grow time: 5 weeks in a 288-cell tray
Temperature Day: 74–76 °F (23–24 °C)
Temperature Night: 74–76 °F (23–24 °C)
Average daily temperature: 74–76 °F (23–24 °C)
Lighting
Day extension lighting: Not necessary
Light intensity: 400–600 µmols·m−2·s−1
Day length response: Day neutral
Daily light integral (DLI): 14–16 mols·m−2·d−1
Media pH: 5.5–5.9
Media EC: SME 0.9 to 1.3 mS/cm, Press/Squeeze Method EC: 1.4–2.0 mS/cm
Fertilizer: 75–125 ppm N
Moisture level: Media should be allowed to dry between irrigations. Alternate between moisture level 2 and 4.
Pinching: No
Plant growth regulators (PGRs): Usually not needed in propagation; under low light levels B-Nine® WSG may be sprayed at 1,500–2,500 ppm. Do not apply Bonzi® to vinca to avoid potential phytotoxicity.
Tech tip: Soil temperatures lower than 75 °F (23 °C) during germination may decrease germination rates. Keeping media pH at 5.8 or lower will help reduce the likelihood of Thielaviopsis infections.
Finishing
Temperature
Day: 76–78 °F (24–26 °C)
Night: 64–66 °F (18–19 °C)
Average daily temperature: 70 °F (21 °C)
Lighting
Day extension lighting: Not necessary
Light intensity: 1,200–1,600 µmols·m−2·s−1
Day length response: Day neutral
Daily light integral (DLI): Greater than 18 mols·m−2·d−1
Transplanting: Transplant directly into the finished container. Place the rooting media slightly below the level of media in the container. Make sure that the root ball is covered and that the plug is situated in the center of the pot.
Media pH: 5.5–5.9
Media EC: SME EC: 1.5–2.1 mS/cm, PourThru EC: 2.3–3.2 mS/cm
Fertilizer: 127–175 ppm N
Pinching: No. Pinching is not recommended or needed.
Plant growth regulators (PGRs): If needed sprays of B-Nine® WSG at 2,500–5,000 ppm or A-Rest® at 2–4 ppm may be applied.
Tech tip: Control thrips to prevent INSV or TSWV infections. Do not try to finish vinca early in the North since the plants need high light and warm temperatures to grow adequately. PGRs are usually not required except in pack production. Never apply Bonzi® to vinca since leaf spotting may occur.
Moisture level: Media should be allowed to dry between irrigations. Alternate between moisture level 2 and 4.
2 - MEDIUM: Soil is light brown in color, no water can be extracted from soil, and soil will crumble apart.
4 - WET: Soil is dark brown but not shiny, no free water is seen at the surface of the soil, when pressed or squeezed water drips easily, and trays are heavy with a visible bend in the middle.
Common pests: Thrips, fungus gnats, shore flies
Common diseases: Thielaviopsis, Rhizopus, Rhizoctonia, Pythium, Tospovirus (INSV and TSWV)
Scheduling
| Size | Crop Time | Plants Per Pot |
|---|---|---|
| Packs | 3–4 weeks | 1 ppp |
| Large Packs | 3–4 weeks | 1 ppp |
| 1.0 pint (4 inch) | 4–5 weeks | 1 ppp |
| 1.0 quart (4.5 to 5 inch) | 4–6 weeks | 1–3 ppp |
| 1.25 to 2.5 quart (5.5 to 6.5 inch, trade gallon) | 5–8 weeks | 1–3 ppp |
| 1.5 gal hanging basket (10 inch basket) | 8–9 weeks | 4–5 ppp |
Estimated finish crop time is from transplant of a 288-cell tray and
finished at an average daily temperature (ADT) of 70 °F (21 °C).
Example crop schedule for a 1.25 quart
| Weeks From Transplant | Description |
|---|---|
| 1 week | Apply preventative fungicide drench for Thielaviopsis and Pythium. |
| 2 weeks | Start thrips monitoring program. |
| 5 weeks | Finish. |
Frequently asked questions
You can buy Syngenta Flowers' products through authorized distributors and brokers. Visit the Distributors section of our website to find a supplier near you.
No, Syngenta Flowers does not sell directly to consumers or growers. Our products are available through authorized distributors and brokers. Please refer to our Where to Buy page for more information.
You can stay informed by visiting the News section on our website, which features updates on new products, partnerships, and industry recognitions. You can also, sign up for our e-mail newsletters for the latest insights on new varieties, tech tips, and more!
Yes, we offer a Technical Document Library with culture guides, sell sheets, white papers, technical articles, and videos to support growers. We have a Grower Success Guide that serves as a fast and easy reference tool for all Annuals and perennials. And if you still need help, contact your broker rep directly, and they will resolve or direct you to the correct contact.
Grower Success Guide
Look for our flowers in garden centers across the country. Many of our seeds are available to consumers from seed packet companies online.
Growers, retailers, agencies, and brokers - can access images through the Trinity Image Library. The library link is conveniently located in the footer of every page.
Yes, during transport, plants experience a lot of stress and when plants are stressed they can release ethylene. Higher temperatures, enclosed spaces, and damage to the plants increase the ethylene concentrations in the shipping environment.
Resources
Protect your Ethylene-Sensitive Crops
All our product catalogs are available digitally on our website's catalog page. While we maintain limited printed versions, we primarily offer digital catalogs to support environmental sustainability.
For the most current product information, we recommend checking our website directly as product details may change more frequently than catalog updates.
You can find our videos across multiple platforms:
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- Document Library: Access our technical videos and product demonstrations
For the most comprehensive video collection, visit our YouTube channel.