RED x Thomas Plants Group
Thomas Plants Group, founded in the 1990's by the Thomas brothers, is amongst the French market leaders for vegetables production and has two production sites: Ploubazlanec in the Côtes d’Armor and Tarascon in the Bouches-du-Rhône.
14 November 2023
One of the leaders in French vegetable plant production.
Founded in the 1990s by the Thomas brothers, the Thomas Plants Group has two production sites: Ploubazlanec in the Côtes d’Armor and Tarascon in the Bouches-du-Rhône. The Thomas Plants Group operates in more than 12 hectares of heated and lit glass greenhouses in which 250 employees work on a daily basis and up to 500 during the peak winter production periods.
Today, under the leadership of Nicolas Paul, the company produces 250 million young plants annually. The production is divided into three key periods:
– Winter: Thomas Plants Group mainly produces warm plants for greenhouse vegetable growers.
– Spring : The production is diversified with all the typical vegetables that can also be found in gardens, such as onions, cabbage, beets and sweet potatoes.
– Summer: This is the high season for young cabbage plants.
Knowing how to meet increasingly demanding customer expectations.
The young tomato plants’ production is a crucial period that represents 30 to 40% of Thomas Plants Group’s turnover. The level of technology required to grow tomatoes is constantly increasing and requires young plants of increasingly high quality. Jérôme Crenn, the group’s R&D manager, ensures that production meets these changing customer needs.
A lighting strategy in full transformation.
Historically, like most growers, the Thomas Plants Group uses sodium or HPS lamps for the cultivation of its young plants.
However, Nicolas Paul believes that the competition from the controllable LED solution is pushing HPS technology to the end of its life cycle. Jérôme Crenn also notices that there is a lot of room for improvement when switching from HPS to controllable LED.
Aware of these issues for young plant producers, RED Horticulture met with Thomas Plants Group in 2018 to explain its concept and its benefits. Louis Golaz, Managing Director of RED Horticulture, explained, “A young plant has the unique feature of having very different stages in its production: sowing, post-grafting, transplanting and so on. At each stage the plant will have different light requirements, hence the interest of controllable LED lighting with a portfolio of different light recipes.”
The Thomas Plants Group benefited from RED’s customized and tailored LED grow lighting solution for the cultivation of young plants.
After identifying the lighting needs, the Thomas Plants Group was equipped with TAURUS 600 managed by the SOLSTICE application. 10 Light recipes were identified and implemented thanks to a joint literature review carried out by RED and Thomas Plants. Jérôme Crenn explained: “For example, we have a recipe that is developed to improve seed germination and another that is perfect for post-grafting recovery.”
The greenhouse is equipped with sensors that interact with SOLSTICE. They provide all the information needed for light management.
“The crop managers define the light recipe to be adopted according to the stage of the plants or varieties they have,” says Jérôme.
A close working relationship for a successful outcome.
The difference between the HPS and the RED LED solution is clear with very positive and encouraging results for the future: Jérôme Crenn emphasizes that their production sites now have a new technical instrument to perfect the cultivation of young plants. Temperature management and humidity have been known for many years, and now RED Horticulture offers a coherent solution for understanding the photobiology of young plants.
There are many advances in the definition of the lighting strategy. Thomas Plants Group’s crop managers report their observations to RED’s Horticulture team enabling them to fine-tune the lighting recipes.
“As soon as we have new requirements, we call RED’s R&D department, with whom we will start tests,” explains Jérôme Crenn.
Much more than a simple customer relationship.
Based on frequent conversations, the RED – Thomas Plants relationship has been built with a common goal of establishing the foundation of photobiology for young plants.
After an initial trial of 1,000 m2 on the Ploubazlanec site in Brittany, the Thomas Plants Group has deployed the RED LED lighting solution on 4,000 m2 in Provence.
“Thanks to the advantages of this solution, we will continue to develop LED lighting surfaces in the coming years,” concludes Nicolas Paul.
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