CULTURE PRACTICES
IMPATIENS Impatiens walleriana Beacon® Series F 1
PREVENTATIVE CHEMICALS Beacon exhibits high genetic resistance to Impatiens downy mildew without the use of chemicals. Beacon can be grown successfully without preventative IDM fungicide applications. Beacon is not immune to IDM; there are scenarios where preventative IDM fungicides may be recommended for Beacon, such as: 1) Receiving plugs or plants from a region where Impatiens are currently growing in the landscape and susceptible varieties are being grown at the recipient location. 2) Plugs or plants are being produced where Impatiens are currently growing in the landscape (which could expose greenhouse or nursery- grown plants to high levels of natural inoculum), and then shipping to other regions. If IDM prevention is part of an overall spray program for susceptible varieties, Beacon’s performance will not be affected if they are also treated. Proper Impatiens production management practices are important for success. This includes water, fertilization and growth regulation best practices. In addition, regular scouting and environmental and cultural controls are recommended. If IDM, or any other diseases, are detected, take action to mitigate the spread and severity. CROP SCHEDULING
Beacon is easy to include in your current production. Below are the general greenhouse guidelines to grow Impatiens without the risk of disease. Plug crop time: 4 to 5 weeks Transplant to finish: 3 to 4 weeks PLUG CULTURE Beacon Impatiens is offered in coated seed form. Sow 1 seed per cell in a recommended 288 plug size. Germination takes 3-6 days at 68-77°F (20-25°C); do not cover the seed. Light benefits germination. Maintain the media pH at 6.0-6.2 and EC of 0.5-0.75 mmhos/cm during plug production. Keep moisture high at Level 4-5. During Stage 2 , provide moisture levels at 2-4 with temperatures at 64-73°F (18-23°C). Set light at 450-700 f.c. (4,800-7,500 Lux). Apply fertilizer less than 100 ppm N, less than 0.7 EC. (Note that White is slightly slower in Stages 1 and 2 than other colors.) Temperatures drop to 65-68°F (18-20°C) during Stage 3 , with light and fertilizer regimens maintained the same as Stage 2. Set moisture at Level 2-3. In Stage 4 , keep moisture at Level 2-3 and lower temperatures again to 62-65°F (17-18°C). Light and fertilizer is the same as Stage 2 and 3. PGR Impatiens will respond to daminozide, paclobutrazol and uniconazol. Monitoring of water and fertilization can help with controlling plant growth and vigor. GROWING ON TO FINISH Temperatures for finishing Beacon Impatiens: Day: 70-75°F (21-24°C) Night: 62-68°F (17-20°C) The target media pH should be 6.2-6.5, with an EC of 0.75-1.0 mmhos/cm. Apply a fertilizer less than 100 ppm N, less than 0.7 EC. Beacon Impatiens are Day Neutral.
CONTAINER SIZE Cell Pack 4"/4.5"/ Quart /10 cm 10" Pot or HB/ 3 Gallon/25 cm
PLUGS/POT CROP TIME SEASON 1 ppp 3-4 weeks Spring 1 ppp 4-5 weeks Spring
3-5 ppp 8-10 weeks Spring
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