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Onion Cultivation
Growing onions with the right nutrition
Growing onions requires a thoughtful approach that focuses on nutrition, soil health and plant resilience. When growing onions, it is important to take into account the crop’s slow growth and susceptibility to stress, deficiencies and diseases. A balanced nutrient supply is therefore essential for uniform growth, strong bulb formation and high final quality.
A major challenge within modern onion farming is preventing hidden calcium deficiencies. This is because onions can develop calcium deficiency unnoticed, without being immediately visible in the crop. This greatly affects the firmness and especially the storability of the onion after harvest.
Therefore, within onion cultivation there is an increasing focus on increasing the availability of calcium and iron in the crop. At the same time, increasing the organic matter content in the soil plays an important role. This contributes to better nutrient uptake, increased resilience and healthier soil life. Ultimately, this makes for stronger plants, better storability and more stable yields.
By applying the right onion nutrients at the right time, you not only support the development of the crop, but also increase its resistance to external influences. This results in a healthier plant, better storage quality and a sustainable yield.
Biota Nutri provides solutions for both organic and conventional growers engaged in onion cultivation. Our products connect to various growing systems and help you get the most out of your onion crop.
Biota Nutri products for onion cultivation
Biota Nutri offers a range of powerful solutions for growers seeking control and efficiency within their crops. Designed for use in both open crops and controlled environments, our fertilizers address the specific needs of onions at different stages of growth. In addition, fully organic options are also available.
Biota Calcium Foliar
Biota Calcium Foliar is a liquid foliar fertilizer specifically designed to quickly supplement calcium deficiencies during onion cultivation. Calcium plays an important role in plant firmness and contributes to improved shelf life and quality.
- Supports firm cell walls and strong bulb formation
- Promotes cell structure and plant resilience
- Rapidly absorbable via foliar application
Biota Amino Complex Foliar
Biota Amino Complex Foliar is a plant foliar feed rich in amino acids that supports the plant during stress moments and intensive growth phases. The product stimulates nutrient absorption and supports vital growth when growing onions.
- Supports recovery from stressful situations
- Improves nutrient absorption
- Promotes active plant growth and vitality
Biota Iron Powder
Biota Iron Powder is a high-quality iron product that helps prevent and correct iron deficiencies in onion fertilization. Iron is essential for chlorophyll formation and healthy leaf development
- Promotes a deep green leaf color
- Supports photosynthesis and energy production
- Suitable for application in low pH crops
Additional nutrient elements for growing onions
In addition to basic fertilization, there are additional options to further optimize onion growing. Additional nutrients such as trace elements, amino acids and fulvic acids can improve nutrient uptake and contribute to a stronger crop.
Because every crop is unique, we always start with an analysis of your situation. Whether you are growing spring onions or white onions, we tailor our advice to your specific circumstances.
Please contact us for appropriate advice.
Challenges in onion growing
Onion growing has several challenges that directly affect yield and quality.
Common challenges in onion production are:
- Plant resilience
When growing onions, stress factors such as drought, heat and nutrient deficiencies play a major role. A good nutritional balance helps strengthen natural resilience. - Hidden calcium deficiency and storability
A common challenge within onion cultivation is a hidden calcium deficiency. This problem is not always immediately visible, but it affects onion firmness and storability during storage. By making targeted calcium and iron available to the crop, the quality of harvested onions can be significantly improved - Diseases and pests
Common problems within onion cultivation are fusarium, onion fly, thrips and downy mildew. Prevention plays a crucial role here. - Plant health and soil structure
A healthy soil is the basis for successful onion cultivation. By working preventively with fulvic acids and amino acids – for example through foliar application – you support nutrient uptake and overall plant health.
How Biota Nutri supports growers
Biota Nutri develops circular, plant-based and fully soluble fertilizers that are seamlessly integrated with modern onion cultivation. Our products are made from waste streams from the food industry and are free of sodium and chlorides.
This makes them widely applicable within a variety of cultivation systems, such as outdoor cultivation, substrate cultivation and specialized growing environments.
Our approach aligns perfectly with growers who strive for:
- strong and resilient onion crops
- maximum utilization of available nutrients onion
- crop support during stress situations
- sustainable and circular fertilization strategies
- uniform growth and consistent bulb quality when growing onions
- stable yields and healthy onion development
Our approach is supported by practical results at home and abroad. We are happy to share our knowledge to further optimize your onion cultivation.
Advice for your onion crop
Each form of onion cultivation is different. Factors such as soil type, climate and cultivation system play a major role in the end result.
That is why Biota Nutri offers personal and cultivation-specific advice. Together we look at your situation and determine which approach best suits your way of growing onions.
Want to know how to improve your onion crop or when is the best time to start planting onions? Then feel free to contact us.
Prefer to try first? In some cases a trial package is available. Ask us about the possibilities.
When to plant onions?
When to plant onions depends on the type of onion. Generally, this is done in early spring, depending on weather conditions.
When to harvest onions?
Onion harvesting is done when the foliage dies and falls over. This time varies by crop, for example, in winter onion harvesting or onion set harvesting.
What nutrients do onions need?
For a successful onion crop, nitrogen, phosphorus and potassium are essential, supplemented by trace elements for optimal growth.
How do onions grow best?
Onions grow best in an airy, well-drained soil with a stable nutrient supply and adequate moisture.