Plant Pit Master: How and What to Plant "Low and Slow"-Greenhouse Management

2021-11-16 18:01:10 By : Mr. Jack Hou

Although this is not common in today's world of increasing plant demand, in some cases, slowing plant growth still makes sense. When doing this, keep the following best management practices in mind.

In the world of barbecue masters, "low and slow" refers to smoking meat for a long time with a low fire, so that the meat is fresh and juicy, and the flavor is full of flavor. 

This is a similar principle in the horticultural world: sometimes growers want to slow down the growth of a crop, giving it more time to root, while reducing the upward growth of vegetative growth. This was the subject of the recent AmericanHort Finished Products Factory meeting held in Grand Rapids, Michigan, hosted by Syngenta's Jamie Gibson.

Gibson is a Ph.D. and head of technical services in a multinational crop investment company. He said that one of the keys to this planting method is to find the base temperature and the optimal temperature for any variety you want to slow down, and find the intermediate point where the growth slows down. But places where plants will not suffer freezing damage or are too dormant.

"The base temperature is the absolute lowest temperature that the plant can withstand before bad things happen—such as lysis, where the plant’s cells start to explode when exposed to extreme cold—start to happen. The optimal temperature is the base temperature and the hottest that the plant can withstand. Temperature," he explained.

According to Gibson, for low-yield and slow crop production, a loose but good guideline is to lower the greenhouse temperature by 8-10 degrees. He warned that while doing so, growers must keep in mind the fact that temperature "has a significant impact on plant quality."

"And [also remember] colder temperatures slow down vegetative growth and inhibit flowering, while warmer temperatures increase the plant's water demand and increase growth rate," he added. "Also, if the temperature is too low, you will get some unwanted pigmentation."

Of course, any seasoned grower knows that when you lower the temperature and keep the humidity level the same, you may be more susceptible to viral plant diseases.

Gibson explained: “Ventilation becomes very important because when the things we grow become colder, we need to maintain relative humidity, because if the outside air starts to warm up, some condensation will start to form.”

As for how to deal with the growing media in this way of growth, Gibson once again stated that everything is to strike a balance.

"You need a mixture with good drainage but good water retention, because it is best to avoid the medium becoming completely dry, but when you grow slowly and grow slowly, you also want to avoid it being really wet," he suggested, noting The grower must monitor the EC and pH levels of the growth medium because the plants still need to absorb nutrients.

Which plants are good candidates?

Gibson made a list of plants suitable for low-speed growth. The list includes:

Gibson does not recommend that greenhouse growers place a plant in a low and slow production cycle that is geranium. He explained: "They are light-storing agents-therefore, the interaction with the light quality of these plants and the higher temperature will affect the final plant quality more importantly than growing them low and slowly."

The members of the association represent more than 80% of North American peat production and provide an annual release of harvest levels for the 2021 season.

The Canadian Sphagnum Moss Association (CSPMA) conducted a survey of its members on August 31 to understand its actual harvest in 2021 as a percentage of the expected harvest in 2021.

The actual harvest in 2021 is defined as the CFT harvest achieved by the company as of August 31, and taking into account the normal harvest conditions, the harvest in the last few weeks of the season can be reasonably estimated.

The expected harvest in 2021 is defined as the number of CFTs, ​​which is equal to a) market demand, plus b) the expected buffer at the end of the 2021 quarter, minus c) the inventory on hand at the beginning of the 2021 quarter (the remaining 2020 buffer).

The overall harvest varies from region to region, with different harvest regions in eastern and western Canada. The harvest in the eastern region was lower than industry expectations, and the harvest in the western region exceeded or fully met industry expectations.

In Western Canada, all regions met or exceeded the target number (Manitoba, 102%; Saskatchewan, 109%; Alberta, 108%). Spring in the three provinces is relatively early and quite dry, so it started well. The entire western part of Canada experienced an important and in some cases record-breaking period of high temperature and drought, which lasted for most of the summer and early fall of 2021. These favorable conditions support the positive results.

In Manitoba, weather conditions (including fire surveillance under provincial regulations) restrict harvesting and plant operations, thereby limiting production capacity. Manitoba industry and government officials are currently formulating an agreement system to deal with extreme situations that may arise in the future.

In New Brunswick, harvests in the northern and southern regions were lower than expected (Northern New Brunswick, 80%; Southern New Brunswick, 76%). The changeable weather patterns combined with the late onset and remnants of Hurricane Ida limited the harvest in the entire ocean area. The harvest on the South Coast (97%) and North Coast (80%) of Quebec was lower than expected. Several summer storms, especially on the North Shore, failed to achieve their target numbers in both areas. Similar weather patterns affected the harvest in Ontario (87%).

South of the border, the harvest in Minnesota (79%) was lower than expected due to weather patterns.

As in the past, CSPMA members are committed to working with their business partners. CSPMA members continue to harvest sphagnum moss in a responsible management manner, bringing social and economic benefits to many communities in North America. In addition, CSPMA members also improve harvesting capabilities through investments in plant infrastructure, harvesting equipment, marsh openings, and personnel training.

PlantHaven team members Robert and Jeanette Bett have purchased a plant marketing agency.

PlantHaven International recently announced that Robert Bett and Jeanette Bett, two long-term team members of PlantHaven International, have acquired the agency from founders Geoff Needham and Maureen Needham. In total, they have more than 55 years of experience in managing breeding combinations in the international market.

Former founder and CEO Geoff Needham will serve as an advisor to the new owner throughout the transition period. PlantHaven International is a breeding organization based in California that currently represents 98 independent breeders and more than 300 valid patented plant combinations. The team invests in international breeding communities and establishes partnerships to help develop successful plant introductions for growers, retailers, gardeners and consumers.

"The Bates joined our team 12 years ago, and Robert has served as CEO for the past eight years," Needham said. "Maureen and I are very excited to see that they inherit the legacy of this institution and represent the most influential independent plant breeding company in our industry."

Robert and Janet have a long-term relationship with PlantHaven International. In 2000, they started working with Needhams in Lyndale Kiwi Flora in Auckland, New Zealand. In 2009, Betts accepted a leadership position at PlantHaven International and moved to Santa Barbara, California.

Robert added: "We are very pleased with the great support of the breeders that PlantHaven International has represented over the years. It has exceeded our expectations and makes us even more excited about the future of PlantHaven 2.0!"

The new headquarters is located in the Riviera Business Park at 2060 Alameda Padre Serra, Suite 202, Santa Barbara, California 93103. The PlantHaven California Spring Trials location will also have a new home at the Santa Barbara Polo Club.

OSHA responds to the record-breaking high temperature in the United States in 2021, which endangers millions of workers exposed to fever and injuries in indoor and outdoor work environments.

The U.S. Department of Labor’s Occupational Safety and Health Administration (OSHA) announced that it will issue an advance notice of the proposed rulemaking on heat injury and disease prevention in outdoor and indoor work environments on October 27, 2021. Currently, OSHA has no specific standards for hazardous high-temperature conditions, and this action begins the process of considering high-temperature-specific workplace rules.

US Secretary of Labor Marty Walsh said: "As we continue to see rising temperatures and record breaking, our changing climate affects millions of American workers who are exposed to harsh and potentially dangerous conditions." "We know. There are a disproportionate number of people of color doing this important work, and they, like all workers, should be protected. We must now take action to deal with the effects of extreme heat and prevent workers from suffering from heat illness or death."

The advance notice of the proposed rulemaking will initiate a comment period to gather different views and expertise on topics such as heat stress thresholds, heat adaptation plans, and exposure monitoring.

Jim Frederick, the Acting Assistant Secretary of Labor for Occupational Safety and Health, said: “Although fevers are largely preventable and often underestimated, thousands of workers are exposed to work every year. In some cases, high temperature exposure can be fatal." "The advance notice of the proposed rule on heat injury and disease prevention in outdoor and indoor working environments is that we protect indoor and outdoor workers from high temperatures. An important part of a multi-pronged plan for harm."

Among all weather-related workplace hazards, high temperature is the main cause of death. To help deal with this threat, OSHA has implemented a nationwide law enforcement action against high temperature related hazards, is developing a national key plan for high temperature inspections, and established a National Advisory Committee for the Occupational Safety and Health Heat Injury Prevention Working Group To provide a better understanding of the challenges, and to identify and share best practices for protecting workers.

Read the Federal Register notice for submission instructions. Starting October 27, please submit comments on, the Federal Electronic Rulemaking Portal, and refer to case file number OSHA-2021-0009. All comments must be submitted by December 27, 2021.

Looking for a new plant species to diversify your products? Many succulents are your answer.

Succulents—the tiny, weird, prickly-looking cactus-like plants that are increasingly common in IGC and even Big Box retailers—were big sellers in the 1970s and 1980s, and like most consumer trends, they It has been around for a while, and it has become a hot product again.

Dave Holley, general manager of Moss Greenhouses, a wholesale factory distributor in Jerome, Idaho, said millennials and their social media accounts are the main driving force for the recent succulent revival.

"By 2027, the annual income of succulents will reach 8 billion U.S. dollars," he shared, adding that Moss started planting 200 sets of succulents as early as 2021, and now they are planting an average of 5,000 sets of succulents each year.

Holley shared some key insights about succulent production in his speech at the AmericanHort Finished Plants Conference in mid-October: