Lobelia Offers A Downy-Mildew-Resistant Option

Lobelia 'Techno Heat Electric Blue'

Consider vegetative lobelia, such as the Techno and Techno Heat series from Syngenta Flowers, as a vivid and versatile alternative to Impatiens walleriana. The two series give consumers a long-lasting and low-maintenance color show in containers, combos and borders. Both Techno and Techno Heat deliver award-winning garden performance.

For spring and summer sales, we recommend lobelia for all regions of the U.S. and Canada, in shade or part-shade. Lobelia is also well suited for fall and winter use in the southern regions of the U.S. The Techno and Techno Heat series are early to flower and day-length neutral, working well for all turns in 4- and 6-inch programs.

Lobelia Propagation Tips

Upon Arrival: Stick relatively quickly and get cuttings hydrated as soon as possible. Only store unrooted cuttings overnight in a cooler if necessary. Cuttings can easily dehydrate.

Rooting Time: Unrooted cuttings typically take about three and a half to four weeks to root in a 105-sized plug. The heat-type lobelias (i.e., Techno Heat varieties) root faster than most traditional non-heat types (i.e., Techno Blue).

Growing Media: High-porosity media is ideal. Fertiss and Ellepot are common choices. Keep pH at 5.6 to 6.2, and test media EC and pH about three weeks after sticking. Adjust as needed.

Pinching: Lobelias do need to be pinched. Be sure to use good sanitation. Cuttings should be well-rooted before pinching.

Temperature: Media temperatures of 72°F to 74°F are ideal. Once the cuttings are fully rooted, the temperatures can be lowered to control growth.

Misting: Spray CapSil one day after sticking to reduce wilting. Do not quit misting too soon and keep humidity high. Lobelias thrive best when misted lightly until adequate rooting occurs, which should be at about two to two-and-a-half weeks.

Gradually reduce night misting from day two through day seven.  Purpling of cuttings can occur when lobelia are taken off of mist too early before they have adequate roots or when the media is staying too saturated to allow root development.

Fertilizer: Apply 100 parts per million (ppm) nitrogen (N) when cuttings start rooting, using a calcium-magnesium formulation of a balanced fertilizer with low phosphorus (i.e., 14-4-14, 13-2-13 or 15-5-15 Cal-Mag). Fertilize daily with 150 ppm N when fully rooted.

Plant Growth Regulators: Spray B-Nine plant growth regulator at 2,500 ppm or Sumagic plant growth regulator at 1 to 2 ppm (make sure to apply lightly). It’s also worth trialing Florel plant growth regulator at 350 ppm or Florel (350 ppm) plus B-Nine (1,500 ppm) as a combination spray about 12 days after sticking and before pinching.

Fungicides: Spray for Botrytis control at day two and day nine, alternating between Daconil ULTREX and Heritage. Drench with a broad-spectrum fungicide (Subdue MAXX plus Medallion fungicide combinations) three to three-and-a-half weeks after sticking to maintain a healthy root system.

Lobelia Finished Production Tips

Grow Time (from rooted cutting): A lobelia in a quart container with one pinch per plant (ppp) takes six to seven weeks of grow time. In a gallon container with two ppp, grow time is estimated at eight to nine weeks. Lobelias in 12-inch baskets with four to five ppp take 10 to 11 weeks of grow time.

Pinch: One pinch, ideally done in propagation, is enough for small and midsize pots. Trailing types will benefit from a second pinch a few weeks after transplant. The second pinch is not as crucial for Techno Heat upright types. When pinching, use excellent sanitation, including viralcides like Virkon-S, RelyOn or Trisodium phosphate.

Growing Media: High-quality media with good porosity is critical for best growth. Peat-based mixes or bark-based mixes can work well.

Fertilizer Rate: Apply 200 ppm N using Cal-Mag fertilizers (i.e., 13-2-13, 15-5-15, 14-4-14, etc.) for more compact growth and neutral pH. Use high ammonium and phosphorus-containing fertilizers (i.e., 20-10-20, 15-15-15, etc.) for softer growth and to lower pH. EC should be between 1.8 to 2.2 mS/cm (SME), with a pH between 5.8 and 6.2. Avoid letting plants get bone dry.

Light: Lobelias should ideally receive more than 4,500 foot candles (15 mols/day). Also, faster and improved flowering occurs when daylength is greater than 12 hours.

Plant Growth Regulators: Spray with 2500 ppm B-Nine plant growth regulator or 5 to 10 ppm Sumagic plant growth regulator to keep plants under control. Bonzi plant growth regulator drenches at 1 ppm also work well three to five weeks before sale.

Insects And Diseases: For lobelia, thrips and thrips-vectored diseases, such as impatiens necrotic spot virus (INSV) can cause problems. Flagship insecticide, Avid miticide/insecticide and Conserve insecticide are effective in a thrips management program. Test suspicious-looking plants immediately. Symptoms of INSV on lobelia include spotted and necrotic leaves, similar to high salt damage. Subdue MAXX, Heritage and Daconil ULTREX fungicides provide protection against foliar and root disease.    

Leave a Reply

More From Crop Inputs...
Suzanne Wainwright-Evans

February 8, 2016

Register Now For Biocontrols USA 2016 Workshop

Biocontrol is becoming a mainstream part of growing plants commercially. Every good program starts with quality products and a good supply chain. Register now to join us from 1:00-4:00 p.m. on March 4, following the conclusion of the education program at the Biocontrols USA 2016 Conference & Expo in Monterey, CA for a special event that will help you improve your biocontrols program. In this informative, real-world workshop led by biocontrols expert Suzanne Wainwright-Evans, owner of Buglady Consulting, you’ll learn: The key players that are producing beneficials How to check product quality once you get them The latest trends and practices growers are using to implement beneficials into their programs Important pitfalls to avoid. A roundup of the current biocontrol research that can help you be more successful in your production practices this season. Wainwright-Evans, a pest management specialist, has been involved in the green industry for more than two […]

Read More
Gotham Greens Queens

February 8, 2016

Gotham Greens Opens Newest Greenhouse In Queens, NY

The new facility, which was partially funded by grants based on reduced energy consumption, nearly triples Gotham Greens’ overall production capacity in New York.

Read More
Dr Allan Armitage

February 8, 2016

Why Succulents Have Become The Hippest Plants On The Market

Allan Armitage says succulents used to be relegated to the far end of the display bench, but their adaptability, decorative value, and low maintenance requirements have now made them a staple.

Read More
Latest Stories
Suzanne Wainwright-Evans

February 8, 2016

Register Now For Biocontrols USA 2016 Workshop

Biocontrol is becoming a mainstream part of growing plants commercially. Every good program starts with quality products and a good supply chain. Register now to join us from 1:00-4:00 p.m. on March 4, following the conclusion of the education program at the Biocontrols USA 2016 Conference & Expo in Monterey, CA for a special event that will help you improve your biocontrols program. In this informative, real-world workshop led by biocontrols expert Suzanne Wainwright-Evans, owner of Buglady Consulting, you’ll learn: The key players that are producing beneficials How to check product quality once you get them The latest trends and practices growers are using to implement beneficials into their programs Important pitfalls to avoid. A roundup of the current biocontrol research that can help you be more successful in your production practices this season. Wainwright-Evans, a pest management specialist, has been involved in the green industry for more than two […]

Read More
Travis Higginbotham

February 8, 2016

Biocontrols And Next-Generation Production

Biocontrols are becoming much more established in greenhouse production. In some cases, it’s the next generation of growers that’s helping to support the adoption of this next generation of pest control. Travis Higginbotham, R&D Manager for Battlefield Farms, in Rapidan, VA, is a great example. Brought on in 2014, he is helping Battlefield take the next step in product development, as well as become more efficient as a business and adapt to new technologies and demands from their customers with a more proactive approach. Higginbotham will share information on Battlefield’s nematode program at the Biocontrols USA 2016 Conference and Expo, March 3-4, 2016 in Monterey, CA. We asked him about the details involved with building a new biocontrols program, as well as the future of sustainability in greenhouse production. Q: What are the differences in costs involved in using biocontrols? What costs should growers consider, aside from the hard costs […]

Read More
Jim Zablocki, Plant Prod

February 5, 2016

Sign Up For A Webinar On Using Plant Nutrition To Impro…

The webinar takes place March 2, and covers how leading growers are using plant nutrition to minimize costs, reduce the number of factors they need to worry about, and lessen environmental impacts.

Read More
Biocontrols Conference and Expo 2016

February 4, 2016

Biocontrols 2016 Conference Offers Insights And Learnin…

The Biocontrols 2016 Conference & Expo, which takes place March 3-4, 2016, in Monterey, CA, brings together growers, pest control advisers, suppliers, researchers, and other segments of the industry to share the latest information on biochemicals, microbial pesticides, and beneficials, and help you put biocontrols to work in your operation.

Read More
Fertilizer Rates Feature Image

January 29, 2016

Bioworks Releases New Higher Nitrogen Fertilizer For Or…

Verdanta N-Vita 9-4-3 promotes foliar growth and features a slow release process, making nutrients available for a longer period of time.

Read More
Primula acaulis, Botrytis, Disease, Griffin Greenhouse Supplies

January 19, 2016

EPA Approves Syngenta’s Mural Fungicide For Use On Seve…

Mural contains two active ingredients and is designed to provide broad-spectrum control of a wide range of root and foliar diseases.

Read More

January 12, 2016

EPA Releases Preliminary Risk Assessment For Imidaclopr…

The assessment, which will soon be open for public comment, indicates that imidacloprid potentially poses risk to hives when the pesticide comes in contact with certain crops that attract pollinators.

Read More
Sustane Research Greenhouse 2015

January 7, 2016

Fertilizer Manufacturers Aim To Deliver Sustainable Sol…

Industry experts discuss the latest trends to help ensure 2016 is your best year yet.

Read More
Vestaron

December 30, 2015

Vestaron’s Spear Bioinsecticide No Longer Carries Bee T…

Following a review that shows it has no detrimental effect on honeybees, EPA has removed the bee toxicity warning statement from Spear.

Read More
How To Overcome Downy Mildew Spread On Impatiens

December 16, 2015

Syngenta Launches Two New Fungicides For The Ornamental…

Solatenol and oxathiapiprolin, each with unique active ingredients, should be available to growers in early 2016.

Read More
Biocontrols Conference and Expo 2016

December 15, 2015

Mark Your Calendars For The Second Annual Biocontrols U…

Produced by Meister Media Worldwide in cooperation with the Biopesticide Industry Alliance, the event brings together growers, pest control advisors, researchers, biocontrols suppliers, and everyone who plays a role in this crucial element of integrated pest management programs.

Read More
Gerbera Yellow Sticky Card

December 10, 2015

Michigan State Offers Free Download Of Bulletin Coverin…

The new fact sheet provides photos and lists commercially available beneficial insects, their target insects, and key facts about biocontrol agents.

Read More
Landmark Open-Bottom Tray

December 8, 2015

Landmark Plastic Addresses Retailer Capillary Mat Requi…

With the availability of water being the number one global risk based on its overall impact to society, it’s no surprise that big name retailers like Walmart, The Home Depot and Lowe’s have taken aggressive steps to reduce their water consumption at store level. More specifically, for the Spring 2016 selling season, Walmart has mandated that its horticultural partners be capillary mat compliant. This means that plants typically watered top-down will now be required to be watered through a sophisticated watering mat that helps saturate the plants from the bottom up. To help growers embrace this new requirement, Landmark Plastic has developed a new trade gallon tray with an open bottom that enables plants to be watered from the roots up. This not only helps utilize water more efficiently, but also helps retailers reduce labor costs associated with the task of watering. “We’ve made it our business to solve problems […]

Read More
Arthij van der Veer Feature image

December 7, 2015

Sustainability Is Key To Your Operation’s Future

During Greenhouse Grower's 2015 Top 100 Growers Breakfast at Cultivate'15, Arthij ven der Veer of MPS (More Profitable Sustainability) discussed crop protection trends in Europe, Latin America, and around the world, and what to expect on the horizon.

Read More
Bee Vectoring Technology Bumblebee

December 1, 2015

New Crop Protection Solution Uses Bees To Deliver Bioco…

The new system from Bee Vectoring Technology incorporated a powdered crop protection material into the lid of commercial bumblebee hives. Bees pick up the product when they leave the hive and deposit it on every plant they visit.

Read More
Stockosorb Crystals_with water Agriculture leaf (Evonick)

November 21, 2015

9 Sustainable Growing Media Products For Superior Green…

Manufacturers are delivering new growing media products to help growers attempt to minimize their footprint without sacrificing quality. Here are nine new products to consider for your greenhouse operation.

Read More
Suzanne Wainwright-Evans

November 16, 2015

Real-World Biocontrols Trends From The Buglady

During ,em>Greenhouse Grower's Top 100 Breakfast at Cultivate'15, Suzanne Wainwright-Evans of Buglady Consulting discussed trends in biocontrols, including what she has seen from breeders, growers and even public gardens.

Read More

October 13, 2015

Bayer CropScience And OHP To End Marketing Partnership …

The move allows Bayer to market its ornamental products directly to greenhouses and nurseries, although OHP will still service a limited line of Bayer products.

Read More
[gravityform id="35" title="false" description="false"]