Nav: Home

Optimal conditions for forcing cut pineapple lily

December 14, 2015

RALEIGH, NC - The authors of a new study say that bringing new types of cut flowers to market is good for consumers and the floral industry. Alicain Carlson and John Dole published a study in the October 2015 issue of HortTechnology that can help pineapple lilies gain favor with cut flower growers, and may spark interest among floral consumers.

Pineapple lily is named for the inflorescence that is lined with star-shaped florets topped with a tufts of bracts, making the flower resemble a pineapple. Blooms can last for more than a month in a vase and even longer on the plant. Carlson and Dole say pineapple lily works well as a cut flower, but more information is needed on proper production methods. "Growers may have access to different production environments depending on their individual operations," they explained. "It is important to understand the differences these production environments will have on the productivity and quality of cut stems."

To determine the effects of bulb storage temperature and duration, production environment, planting density, and forcing temperatures, the scientists planted bulbs of 'Coral', 'Cream', 'Sparkling Burgundy', and 'Lavender' pineapple lily in either a double-layered, polyethylene-covered greenhouse or loamy clay soil field beds at North Carolina State University in Raleigh. Bulbs in both production environments were planted at a low density of six bulbs per crate or a high density of 12 bulbs per crate.

The researchers assessed pineapple lily stem length and caliper, and number of marketable (greater than 30 cm in length and with no abnormal development) stems. They found that both stem length and stem caliper were greater in lilies grown in the greenhouse. Flowering depended greatly on temperature; bulbs in the 18 °C production temperature emerged faster and flowered sooner than those grown in cooler temperatures.

"We found that all the pineapple lily cultivars in the study could be grown in either the open field or greenhouse and produce marketable stems," the authors noted. "This allows growers versatility in production environment and planting density to suit individual needs and still produce marketable stems."

Dole and Carlson recommend a low planting density for bulbs used for multiple seasons to allow for subsequent years growth of bulblets. "If the bulbs are grown for just one season, a high planting density has no adverse effects," they said.

The authors recommended that growers leave pineapple lily bulbs in substrate from season to season and cold store for at least 47 days, or dry store in a greenhouse until ready to force. They noted that warmer forcing temperatures are ideal to accelerate flowering of pineapple lily.
The complete study and abstract are available on the ASHS HortTechnology electronic journal web site:

Founded in 1903, the American Society for Horticultural Science (ASHS) is the largest organization dedicated to advancing all facets of horticultural research, education, and application. More information at

American Society for Horticultural Science

Related Greenhouse Articles:

Mediterranean rainfall immediately affected by greenhouse gas changes
Mediterranean-type climates face immediate drops in rainfall when greenhouse gases rise, but this could be interrupted quickly if emissions are cut.
Seeking better guidelines for inventorying greenhouse gas emissions
Governments around the world are striving to hit reduction targets using Intergovernmental Panel on Climate Change (IPCC) guidelines to limit global warming.
Nitrous oxide, a greenhouse gas, is on the rise
A new study from an international group of scientists finds we are releasing more of the greenhouse gas nitrous oxide into the atmosphere than previously thought.
Making microbes that transform greenhouse gases
A new technique will help not only reduce greenhouse gas emissions, but the potential to reduce the overall dependence on petroleum.
Reducing greenhouse gases while balancing demand for meat
Humans' love for meat could be hurting the planet. Many of the steps involved in the meat supply chain result in greenhouse gas emissions.
Degrading plastics revealed as source of greenhouse gases
Researchers from the University of Hawai'i at Mānoa School of Ocean and Earth Science and Technology (SOEST) discovered that several greenhouse gases are emitted as common plastics degrade in the environment.
Wandering greenhouse gas
On the seafloor of the shallow coastal regions north of Siberia, microorganisms produce methane when they break down plant remains.
Thawing permafrost releases old greenhouse gas
The thawing permafrost soils in the Arctic regions might contribute to the greenhouse effect in two respects: on the one hand rising temperatures lead to higher microbial methane production close to the surface.
Greenhouse gases: First it was cows -- now it's larvae!
Scientists at UNIGE have discovered that Chaoborus spp uses the methane it finds in lakebeds to help it move around.
Researchers discover greenhouse bypass for nitrogen
An international team discovers that production of a potent greenhouse gas can be bypassed as soil nitrogen breaks down into unreactive atmospheric N2.
More Greenhouse News and Greenhouse Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

There's so much we've yet to explore–from outer space to the deep ocean to our own brains. This hour, Manoush goes on a journey through those uncharted places, led by TED Science Curator David Biello.
Now Playing: Science for the People

#556 The Power of Friendship
It's 2020 and times are tough. Maybe some of us are learning about social distancing the hard way. Maybe we just are all a little anxious. No matter what, we could probably use a friend. But what is a friend, exactly? And why do we need them so much? This week host Bethany Brookshire speaks with Lydia Denworth, author of the new book "Friendship: The Evolution, Biology, and Extraordinary Power of Life's Fundamental Bond". This episode is hosted by Bethany Brookshire, science writer from Science News.
Now Playing: Radiolab

Dispatch 1: Numbers
In a recent Radiolab group huddle, with coronavirus unraveling around us, the team found themselves grappling with all the numbers connected to COVID-19. Our new found 6 foot bubbles of personal space. Three percent mortality rate (or 1, or 2, or 4). 7,000 cases (now, much much more). So in the wake of that meeting, we reflect on the onslaught of numbers - what they reveal, and what they hide.  Support Radiolab today at