Callused Geranium Cuttings: Tips For Successful Rooting

'Americana Pink' geranium from Syngenta

Growers are always looking for opportunities to improve production efficiency and reduce costs. One option is to use callused cuttings when producing vegetative geraniums. The key advantage of starting with callused instead of unrooted cuttings is that they can be directly stuck into the finish container without the need for an automated misting system. Additional benefits include reduced shrinkage and more uniform rooting.

Upon Arrival

Upon arrival of callused cuttings, boxes should be unpacked and cuttings stuck immediately. If that is not possible, opened boxes should be stored at 36 to 38°F for no longer than 24 hours. Longer storage duration can cause excessive leaf yellowing and loss of cuttings. When a cooler is not available for temporary storage, the bags should be opened and the cuttings should be laid on the bench and frequently misted well.

Sticking

Callused cuttings can be directly stuck into a final container filled with a growing media that has good water-holding capacity and aeration such as Fafard 1P Mix, 2 Mix, 3B Mix or 4P Mix. The recommended media pH is 6.0 to 6.4 (saturated media extract) for zonal geraniums, 5.4 to 5.8 for ivies and 5.8 to 6.2 for hybrid geraniums such as the Calliope series.

On the day prior to sticking cuttings, irrigate pots to ensure media moisture is at level 4 (media is wet, but water is not easily observed when pressed). Maintaining good moisture levels in only the top half of the container will result in good aeration, fast rooting and minimal losses. If the media remains too saturated, there is greater risk for Botrytis on stems and leaf petioles.

Rooting

After cuttings are stuck, apply enough mist to hydrate the leaves. Once roots begin to form, consider an application of a preventive fungicide drench such as Subdue Maxx at 1 ounce/100 gallons to avoid any problems with Pythium. If cuttings arrived warm or stressed, Fascination can be sprayed at 2 ppm to help reduce leaf yellowing.

On days three to five after stick, check cuttings every 30 to 45 minutes for wilting and mist lightly by hand as needed. Use a misting nozzle that produces a fine mist or fog since regular watering nozzles will cause the media to become oversaturated. While helpful, automatic misting systems are generally not needed for rooting callused geranium cuttings. Keep light levels at 2,000 foot candles. For fast rooting, maintain 80 percent relative humidity, media temperature at 70 to 74°F and air temperature at 65 to 75°F.

After cuttings are rooted, misting can be stopped and shade cloth removed. Light levels can be increased to 3,500 to 4,000 foot candles. During this stage, air temperature should be maintained at 70 to 75°F day and 65 to 68°F nights. Begin fertilization at 150 ppm nitrogen using a calcium-magnesium nitrate formulation. As roots reach the bottom of the container, the fertilizer rate can be increased to 200 to 250 ppm nitrogen. The target media electrical conductivity (EC) should be 2.0 to 2.5 mS/cm. As the crop develops, perform a media analysis and check that pH and EC are within the correct ranges. About two weeks after sticking, consider applying a plant growth regulator such as Florel or Cycocel to increase branching and reduce stem extension.

Leave a Reply

One comment on “Callused Geranium Cuttings: Tips For Successful Rooting

More From Annuals...
Westhoff-Florist Holland combos

July 30, 2016

Pair New Spring Crops With Fresh Ideas For Increased Sales

There are plenty of exciting, new spring crops to consider incorporating into your crop selection. What will set your operation apart is how creative you are about what plants you select, and how you promote them.

Read More
Pleasant View Gardens Savor Edibles

July 22, 2016

Pleasant View Gardens Targets Millennials With Savor Edibles

Taking something as ubiquitous as vegetables and herbs and giving it a fresh new look is no easy task, but Pleasant View Gardens took on the challenge with extensive research and creative marketing.

Read More
Dummen New Columbus Office

July 21, 2016

Dümmen Orange Opens New North American Headquarters In Columbus, OH

The new office, which officially opened during Cultivate’16, supports the company’s vision to be integrated into a vibrant and inspiring community, and provides a bright, modern workspace for its approximately 30 local employees.

Read More
Latest Stories
NGI-SunPatiens-Compact-Hot-Coral-Sakata

March 23, 2016

P. Allen Smith Says SunPatiens Are Hero Plants For Cons…

Plants that ensure consumer success with disease resistance bred into their genetics, and ease of use in a variety of conditions, are heroes for gardeners, especially beginners, and they should be celebrated and supported to promote gardening success and interest. These are the messages the award-winning designer, gardening, and lifestyle expert P. Allen Smith wants the horticulture industry to know, with the recent announcement of his expanded partnership with Sakata Seed. In an exclusive interview with Greenhouse Grower, P. Allen Smith describes his expanded partnership with Sakata Seed to promote SunPatiens and why the now 10-year-old series helps both novice and expert gardeners to be successful. Smith also collaborates with Sakata to promote the HomeGrown Collection of vegetables. SunPatiens Set Consumers Up For Success, Smith Says As a plantsman first, Smith has extensively trialed SunPatiens in his gardens at Moss Mountain Farm in Little Rock, AR, and says he is […]

Read More

March 15, 2016

California Spring Trials Central Region Preview: More N…

Spring is finally here, and you can draw inspiration from the hundreds of new varieties you’ll see at California Spring Trials (CAST) 2016. The annual exodus to the West Coast is coming up, but before you hit the trail, check out the slideshow below to see some of the new annuals making their debut to the trade this spring. Because so many annuals are revealed at CAST, we had to build two slideshows — one for the Northern Region and one for the Central Region. Last week’s focus was on the Northern Region, but this week we’re highlighting annuals that will be showcased in the Central Region. We asked breeders to share with us pictures and information on some of the great new annuals introductions they will debut at CAST 2016. They didn’t let you down. These new annuals introductions have all the great characteristics you’ve come to rely on from breeders — excellent […]

Read More

March 9, 2016

Get A Glimpse At New Annuals For 2017, Debuting At Cali…

California Spring Trials (CAST) is coming up, but before you hit the trail, here’s your chance for a glimpse at the new annuals that will be hitting the market in 2017. We asked breeders to share with us pictures and information on some of the great new annuals introductions they will debut at CAST 2016. They didn’t let you down. These new annuals introductions have all the great characteristics you’ve come to rely on from breeders — excellent branching, good uniformity, flower power, and most important, long-lasting garden performance. Check out the slideshow below to see some of the new annuals making their debut to the trade this spring. And because so many annuals are revealed at CAST, we had to build two slideshows – one for the Northern Region and one for the Central Region. This week we’ll focus on the Northern Region, but stay tuned for the Central […]

Read More

November 6, 2015

Greenhouse Production Tips For A Successful Spring Pans…

Following good, methodical growing practices from start to finish will produce a pansy crop that is not only green and healthy, but well-toned and able to withstand the potential extreme temperature and weather conditions of spring bedding crops.

Read More
Dahlia1

October 12, 2015

Dahlia Production Tips For High Quality Greenhouse Plan…

We are beginning to see a new generation of dahlia breeding where emphasis is moving back to staggered blooming and improved disease tolerance. Here are some tips for greenhouse production that will get your dahlias off to a strong start.

Read More
WavePetunias-GrowIt_contest_featured

June 18, 2015

Wave Petunias Sponsors Photo Contest Through GrowIt! Ga…

The gardening season is heating up and the Wave Petunias Team wants to see the #WildestWave. The popular plant brand has joined forces with the GrowIt! Garden Socially app to host a two week contest in June that encourages Wave Fans to share and rate photos of their favorite Wave Petunias. The grand prize is a $100 gift card to the garden center of the winner’s choosing. “We are excited to work with GrowIt! and see our Wave Petunias tagged in cities from coast to coast,” says Claire Watson, brand manager for Wave. “Seeing gardeners’ creative photography, awarding a winner, and learning what each region likes about Wave Petunias will be extremely useful as we further promote our ‘Wow ’em With Wave’ ad campaign this season.” Gardeners can place an entry into the contest by downloading GrowIt!, filling out a profile, and uploading photos of Wave Petunias. Placing the tag #WildestWave in the photo’s comments section […]

Read More
Salvia 'Ember's Wish'

March 11, 2015

Annual Salvias – Not Just Red Bedding Plants Anym…

Salvias are popular — and they need not all be the same. Here are a few you know well, and perhaps a few you do not. All are easy to grow and may be found through a broker or grower.

Read More

February 18, 2015

New Annuals For 2016 From California Spring Trials

California Spring Trials (CAST) is long past for 2015, but you still have the chance to see the new genetics that will be hitting the market in 2016. We asked breeders to share with us pictures and information on some of the great new annuals introductions they shared at CAST, so we could share them with you.

Read More

November 14, 2014

First Vegetatively Propagated All-America Selections (A…

All-America Selections (AAS) honors two vegetatively propagated impatiens with AAS winner status.

Read More

October 13, 2014

Growing Tips For Verbena

Rich Schoellhorn, product manager at Proven Winners, shares some tips for growing verbenas successfully.

Read More

October 13, 2014

Greenhouse Grower 2014 New Varieties Guide: Petunias [S…

Greenhouse Grower asked more than 40 breeders to send photos of new introductions they think are worth your attention. The result is the 2014 New Varieties Guide. See what petunias made the cut.

Read More

June 12, 2014

New Begonia Variety And Coleus Series, Plus Two Lobelia…

Terra Nova Nurseries introduces seven new varieties and one new series.

Read More

May 27, 2014

Two New Salvias Added To Southern Living Plant Collecti…

Two new salvia varieties are now available exclusively to growers from the Southern Living Plant Collection and Sunset Western Garden Collection.

Read More

May 9, 2014

New Petunias Making Their Debut In 2015

Take a look at the new petunia varieties that will be making their appearance in 2015.

Read More

April 23, 2014

Foliage Begonias May Be A Big 2015 Trend [Spring Trials…

A number of breeders debuted their rex begonia and begonia hybrid lines at 2014 Spring Trials.

Read More
Petunia 'Success Violet' from Benary

April 11, 2014

What’s New With Petunias For 2014? [Slideshow]

Breeders are rolling out great new petunia introductions for 2014. Take a look at the variety of petunias they have to offer.

Read More
Verbena 'Superbena Royale Whitecap' from Proven Winners

November 11, 2013

Three New Verbena Superbena Introductions From Proven W…

Three new varieties have joined the verbena Superbena line-up this year: 'Superbena Royale Plum Wine,' 'Superbena Royale Whitecap' and 'Superbena Violet Ice.'

Read More
Calibrachoa 'Mini Famous Double Blue' from Selecta

October 17, 2013

6 New Calibrachoa For 2013

Check out these lovely new introductions in calibrachoa.

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