Top 5 - yesterday
- CAN (SK): “The flowers take a long time to start growing but it is worth it because they are so beautiful”
- Plants remove cancer causing toxins from air
- Use of prohydrojasmon to suppress Frankliniella occidentalis and tomato spotted wilt virus in chrysanthemums
- Kuehne+Nagel announces management changes in Middle East and Africa region
- UK: Award-winning Chelsea Flower Show garden to go on display in Hampshire
Top 5 - last week
Top 5 - last month
- Hasfarm’s network expands in Indonesia, partnering with Bromelia Flowers and Tropika
- "Breeders need to study the Chinese market carefully before introducing a variety"
- Royal Flowers merges with The Elite Group
- North America: “Unbridled optimism for Mother’s Day tempered by reality”
- “A new sales channel for flower companies without any labor or high fixed costs”
"Bio-fertilization works in pelargonium"
by Hans Peter Haas
Organic cultivation of pelargoniums, economically feasible?
While the production of organic fruit and vegetables has long been established, producers of ornamental plants are rather sceptical about this development and doubt, above all, its economic feasibility. The restructuring of production will result in a massive cut in the usual work processes. For the most part, the experience and the knowledge of whether the required quality standards can be met will be lacking. Many cultures do not have reliable cultivation instructions. Weihenstephan-Triesdorf University of Applied Sciences has sought to remedy that situation and has been studying this topic for a long time.
College experiment with organic fertilisation: Despite different growth results, the majority of geranium plants proved to be in good quality.
A college is cultivating geranium varieties following the guidelines for organic production
Among other things, Pelargonium peltatum of the cultivars ‘Grandeur Bright Dark Red’ and ‘Calliope Dark Red’ were cultivated according to the guidelines of organic production. The peat-reduced bio-substrates made by Jiffy International AS and Gramoflor GmbH & Co. KG were used as a culture substrate. The pelargoniums were potted in the eighth calendar week in a 13 cm Teku VTG growing pot, which according to the manufacturer possesses a capacity of 0.84 litres of substrate. The fertilization was carried out as full stockage with a nitrogen-content based on 650 milligrams of nitrogen (N) per litre of substrate. The organic fertilizers used included phyto-grit (mainly from corn), neem cake, DCM Eco-Xtra1, DCM Eco-Plant 7 and sheep wool pellets in combination with Eco Fos. Osmocote Exakt 3-4 M was used for testing purposes. Pelargonium fertilizers were added to the substrates before the start of the test.
Good marketability for pelargoniums – with the exception of those with sheep wool fertilization
The photos above show plants that are ready to be sold after eleven weeks of cultivation. Despite different growth results, the majority of pelargonium plants presented remained in good quality. An exception to that were the plants that had been fertilized with sheep wool pellets plus Eco Fos. Here the plants were consistently smaller and had fewer flowers. In addition, the pelargoniums of the ‘Calliope Dark Red’ variety showed clear leaf whitening and were therefore classified as not sellable. The evaluation of plant growth based on the organic substrates used revealed significant differences in some growth parameters, which, however, did not affect the assessment of the marketability of pelargonium.
Conclusion of the Pelargonium experiment: full stockage possible
Pelargonium cultivation based on guidelines for organic cultivation was successful. The marketability of the majority of the plants at the time of sale proved to be very good.
A full supply of nutrients presented itself as a possible alternative for geraniums to basic fertilizer plus liquid post-fertilization. However, the exact knowledge of the nutrient requirements of the culture is required, in some cases even a variety-specific approach is required.
In the case of full stockage with organic fertilizers, the greatest difficulty is estimating the availability of nitrogen in terms of time and quantity, especially since the fertilizer is affected by the composition of the substrate as well. The mosquito infestation can spike by using solid organic fertilizers. The organic fertilizer “neem cake” did not have a positive side effect in the regulation of the fungus gnats. Watering treatments with NeemAzal, however, can be recommended.
For more information:
T: +49 7321 9594 290
F: +49 7321 9594 299
Receive the daily newsletter in your email for free | Click here
Other news in this sector:
- 2023-05-25 Fertilizer affordability starts to improve after two turbulent years
- 2023-05-16 FloraLife introduces new product to hydrate and condition post-harvest hydrangea crops
- 2023-05-03 Ensuring proper fertilizer concentration in greenhouse growing
- 2023-05-02 Yara results down because of declining market prices
- 2023-04-24 How to calculate fertilizer rates?
- 2023-04-20 Vase Life Study results of Roses, Alstroemeria, and Chrysanthemum using FloraLife Flower Food
- 2023-04-20 Plant vaccines delivered via microneedle could offer alternative to chemical spraying
- 2023-04-17 What unique benefits do plants get from biofungicide and mycorrhizae?
- 2023-04-07 Griffin adds Hortus USA products to US and Canada portfolio
- 2023-04-06 Two big announcements for Actinovate
- 2023-03-14 Fertilizer producer returns to profit after huge loss in 2021
- 2023-03-13 Should you tank mix your pesticides?
- 2023-02-17 "EU should be less dependent on imported fertilizers"
- 2023-02-06 High-tech test and innovation center for Dutch biostimulant producer
- 2023-01-11 Bee Vectoring Technologies and BioSafe Systems start selling CR-7 products into foliar and soil drench markets
- 2022-12-15 Effects of water balance on cut flower postharvest performance
- 2022-12-12 “It is one of the ‘star shows’ on the Indian sub-continent and across the wider East Asian area”
- 2022-11-30 Jewel orchid’s biological and physiological response to aquaponic water as potential fertilizer
- 2022-11-23 Vietnam: Agricultural sector aims to increase use of organic fertilizer
- 2022-11-16 "First shipment of Russian fertilizer marks breakthrough in global supply crunch"