Calibrachoa Finished Production Tips

Grow Time (From Rooted Cutting)

Calibrachoas in a quart container with one plant per pot take six to seven weeks; in a 1-gallon container with two plants per pot, 10 to 11 weeks; and in a 12-inch basket with four to five plants per pot, 11 to 12 weeks.

Pinching

4.5-inch or quart containers require one pinch (during propagation) while gallon containers or baskets require one in propagation and one after planting. When growing baskets, trimming the branches once they grow over the edge of the baskets results in the most uniform and even plants. Use a viricide such as Virkon-S, RelyOn or Trisodium phosphate (TSP) viricides when pinching or trimming after at least every variety. An early application of Florel plant growth regulator at 350 to 500 parts per million (ppm) can be used to enhance branching or in place of the second pinch.

Growing Media

High-quality media with good porosity is critical to avoid root rot. Peat-based mixes, like Fafard 2 Mix or 1P Mix, or bark-based mixes, like Fafard4P Mix or 3B Mix work well.

Fertilizer Rate

Apply 200 to 250 ppm nitrogen (N), using a calcium-magnesium formulation of a balanced fertilizer with low phosphorus (i.e. 13-2-13, 14-4-14 or 15-5-15 Cal-Mag) or a more acidic ammonium-containing fertilizer (i.e. 20-10-20 or 20-9-20) if keeping the pH low is a challenge. Electrical conductivity (EC) should be around 2.0 to 2.5 mS/cm (SME) with pH between 5.4 and 5.8. Supplemental iron-chelate (Sprint 138 or 330) as a drench (4 ounces/100 gallons) is recommended to avoid iron deficiency related tip yellowing, especially under hot conditions and elevated pH (more than 6.0).

Light

Calibrachoas should ideally receive more than 4,500 foot candles (more than 15 mols/day). On crops sold before April 1, night-interruption lighting is strongly recommended to bring plants into flower earlier and to get more even flowering across the series.

Temperature

Initially, 68°F to 72°F days, 62°F to 64°F nights are ideal. The temperature can be lowered for the last four weeks of the crop.

Plant Growth Regulators

Spray with 2500 to 5000 ppm B-Nine plant growth regulator, 10 to 20 ppm Sumagic plant growth regulator or 5 to 10 ppm Topflor plant growth regulator. The key to achieve well-rounded and compact plants without stretching is a drench with Bonzi plant growth regulator three to four weeks before finishing. A drench with I ppm Bonzi could be enough for compact varieties like ‘Callie Rose’ or ‘Callie Light Blue’ while 3 ppm might be best for vigorous varieties like ‘Callie Bright Red’ or ‘Callie Star Rose.’

Diseases

Calibrachoas are very sensitive to fungal root rot. Make sure to not over-water (especially at low temperatures), and keep pH between 5.4 and 5.8. Drench with broad-spectrum fungicide (Subdue Maxx plus Medallion fungicide combinations) as needed.

Insects

Scout for aphids and budworms. Flagship insecticide and Endeavor insecticide provide excellent control of aphids. Conserve insecticide and Dipel insecticide are effective in controlling budworm.

Leave a Reply

More From Plant Culture...

March 4, 2015

Second Annual GreenhouseConnect Will Bring Growers and Suppliers Together in San Diego This October

Following a successful inaugural event in Tampa last fall, Greenhouse Grower has announced the dates of its second annual GreenhouseConnect: October 26-29, 2015. Representatives of an expected two dozen leading greenhouse operations from across the U.S. will join senior-level suppliers at Rancho Bernardo Inn in San Diego for several days of one-on-one strategic meetings, a growers-only roundtable, informational sessions and a variety of networking events.

Read More
cultivate'15 logo

March 4, 2015

Cultivate’15: AmericanHort Announces What’s New

In an industry that has seen major changes occurring at a fast pace, many industry professionals leave Cultivate with their heads spinning and no clear idea of how to regroup and strategize. Cultivate’15 is “Changing the Game.” As this year’s focus, Changing the Game will call your attention to the ways in which our industry has changed and your opportunities to compete successfully.

Read More

March 4, 2015

California Spring Trials Preview: 32 New Perennials For 2016

Perennials are hot and if this preview of the 2015 California Spring Trials is any indication, there are going to be some great new perennial introductions for 2016. We contacted the breeders who will be displaying their new varieties in California in April, and they gave us a sneak peek. Check out the slideshow to see some of the new perennials making their debut to the trade this spring.

Read More
Latest Stories

February 11, 2015

Infusion Technology Boosts Seed Performance, Study Sugg…

Seven-year-old wheat seed germination can increase by as much as 83 percent, according to a Vital Force Technology Study that looks at the effects of energy infusion technology on plant vitality.

Read More

February 3, 2015

American Floral Endowment Accepting Research Pre-Propos…

If you are pursuing a floriculture research project, now is the time to apply for funding through the American Floral Endowment. Research pre-proposal applications for 2015-2016 funding are due to AFE by June 1, 2015.

Read More

January 27, 2015

Marijuana’s Trajectory And Ascent To Horticultural Cr…

Marijuana growing is poised for change as growers and researchers focus on improving production practices.

Read More

December 9, 2014

Greenhouse Production: Two Years Of Basics & Beyond…

Greenhouse Grower's Basics & Beyond articles cover some of the latest news and research going on in greenhouse production. Here are article links for the last two years.

Read More
GrowIt! App Wins Gold At Design100 2014 US Mobile & App Design Awards

November 24, 2014

GrowIt! App Wins Gold At Design100 2014 US Mobile &…

The social garden app GrowIt! takes the Gold Winner award at the design100 2014 Mobile & App Design Awards.

Read More

November 10, 2014

The Perennial Farm Joins HGTV HOME Plant Collection

The Perennial Farm joins the HGTV HOME Plant Collection growers' network for 2015.

Read More
AmericanHort

November 4, 2014

AmericanHort Publishes Revised American Standard For Nu…

AmericanHort announces the revised American Standard for Nursery Stock (ANSI Z60.1) is now available for industry use. The Standard reflects the consensus of the industry regarding how nursery stock — living plants other than annuals — should be specified and sold within the trade.

Read More

September 26, 2014

Master The Art Of Watering

Watering is elemental to healthy plants, but one of the hardest concepts for new employees to master in the greenhouse. Recommend these tips to start them off right.

Read More

September 16, 2014

Ball FloraPlant’s Las Limas Facility Provides Gro…

Ball FloraPlant’s Las Limas farm in Esteli, Nicaragua, is one year away from full production, but sales and quality from the two-year-old facility are right on track.

Read More
Erysimum 'Cheers' from Darwin Perennials

September 15, 2014

Darwin Perennials Takes Production Offshore In Bogota, …

With its recent purchase of a farm in Colombia, Darwin Perennials is ready to amp up supply of its perennial genetics, to provide growers with tried-and-true varieties and comprehensive production specifications.

Read More

July 23, 2014

Plan Now To Prevent Bract Edge Burn On Poinsettias

Reduce fertilizer and water, and allow your poinsettias to develop slowly during the final four weeks of production to avoid bract edge burn.

Read More

July 11, 2014

Growing Your Crops Above Their Base Temperature

Lowering temperature set points in the greenhouse may help you combat rising heating costs.

Read More

May 1, 2014

Growers Report Nutritional Problems On Geraniums

In recent weeks, several growers have contacted Michigan State University Specialists about leaf discoloration on geraniums, especially the purpling of lower leaves.

Read More

April 22, 2014

How Two Postharvest Care Products Worked On Potted Plan…

What your potted plants look like at retail translates to sales or fails. North Carolina State University researchers report on how two postharvest care products performed.

Read More
Dianthus 'Passion' from Emerald Coast Growers

March 27, 2014

Growing Dianthus Successfully

Here's some advice on transplanting and producing this classic perennial favorite.

Read More
Aquilegia canadensis

March 10, 2014

Tips For Producing Aquilegia

Advice on planting, temperature, vernalization, lighting and more on columbine from Emerald Coast Growers' head grower Josiah Raymer.

Read More
Perennials in hoop house

February 21, 2014

Overwintering Perennials: Plan Ahead To Fungicide Drenc…

Demand for perennials has increased as consumers educate themselves and seek out new and improved varieties. Overwintering perennials can become an important profit center. Here's some advice on how to overwinter successfully.

Read More
Cold damage to ipomoea

February 11, 2014

Chilling Injury On Cuttings: What To Look For

During this young plant production season when many growers receive unrooted cuttings, liners and plugs for spring production. Cuttings shippers are delaying deliveries because the tender cuttings cannot withstand the frigid temperatures.

Read More