Fertilizer Selection Guide
From Understanding Plant Needs to Choosing the Right Solution
Selecting the right fertilizer starts with understanding the actual needs of the plant. This guide is designed based on plant growth stages and nutritional requirements, helping you easily choose the most suitable nutrition strategy and recommended products.
Main Growth Stages
Root Establishment
Root development and the beginning of uniform growth.
Vegetative Growth
Leaf and shoot development and increasing photosynthetic capacity.
Reproductive Stage
Supporting flowering, reproductive development, and crop formation.
Fruit Development
Improving size, weight, and translocation of photosynthetic products.
Ripening & Quality
Enhancing quality, tissue strength, and marketability.
Root Establishment
The Foundation of Successful Growth
Every successful nutrition program begins with a strong start, and that starts with the development of a healthy and active root system. Phosphorus Complex is designed to support early plant establishment, providing suitable conditions for root development and balanced growth after planting, transplanting, or seedling establishment. This product delivers the greatest value when included as part of the nutrition program from the beginning of the growing season. When required, organic compounds such as humic acid can complement the nutrition program by improving root zone conditions. Since phosphorus is rapidly fixed in many soils, selecting the right phosphorus source and applying it at the right time is often more important than simply increasing application rates
Phosphorus Complex 25%
A rich phosphorus source designed to support root development, early establishment, and balanced growth in orchards, fields, and greenhouses.
Best Application Timing
- After planting or transplanting
- Beginning of root activity
- Seedling establishment
- Early crop growth
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Vegetative Growth
Building the Plant’s Production Capacity
Vegetative growth is the stage when plants build the foundation for future production. Liquid Nitrogen is designed to support uniform leaf and shoot development, increase photosynthetic capacity, and maintain active plant growth. It is an effective part of nutrition programs during active growth and vegetative development stages. Optimal growth depends not only on nitrogen supply but also on its balance with elements such as magnesium and potassium, which play important roles in maximizing photosynthesis and plant performance.
Liquid Nitrogen
A fast-available nitrogen source designed to support vegetative growth, leaf expansion, and active development in orchards, fields, and greenhouses.
Best Application Timing
- Beginning of active growth
- Leaf and shoot development
- Reduced vegetative growth
- Increased photosynthetic demand
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Reproductive Stage & Beginning of Crop Formation
The reproductive stage marks the transition from vegetative growth toward crop formation.
Zinc Complex is designed to support this transition by contributing to young tissue development, cell division, and balanced plant growth during early reproductive stages.
For a wide range of crops, from cereals and field crops to orchard and greenhouse plants, it can be an effective component of nutrition programs during the formation of spikes, clusters, pods, seeds, flowers, or fruits.
Since zinc availability is often limited in calcareous and alkaline soils, selecting the appropriate form and applying it at the right time is generally more effective than increasing the application rate.
Zinc Complex 20%
Targeted zinc nutrition to support reproductive growth and early crop formation.
Best Application Timing
- Before flowering or bud swelling
- Tillering and stem development
- Spike formation in cereals
- Fruit, pod, or seed formation
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Product Quality
Completing What the Plant Has Built
As crop development progresses, plants use a significant amount of energy for transporting photosynthetic products, increasing weight, and developing quality characteristics.
Potassium Complex is designed to support efficient nutrient transport, improve uniformity, color development, filling, and final crop quality.
Maintaining photosynthetic activity during this stage is also essential. When needed, magnesium supplementation can support energy production and continuous photosynthesis.
Choosing the right potassium source and application timing plays a key role in achieving higher production potential and improved quality.
Potassium Complex 35%
A potassium-rich formula containing complexing compounds to support crop quality, filling, and maturity.
Best Application Timing
- Beginning of fruit, seed, or tuber development
- Crop filling stage
- Color development
- Before harvest
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Strength & Shelf Life
Maintaining Quality Until Harvest
Crop quality is not only developed during maturity; it must also be maintained until harvest.
Calcium Complex is designed to support tissue strength, uniform development, and product quality by helping reduce physiological disorders and quality losses during crop development. During early fruit formation or when boron supply is required, Calcium + Boron can be a more suitable choice. Because calcium has limited mobility within plants, application timing plays a critical role in effectiveness. Product selection should always be based on growth stage and actual plant requirements.
Calcium Complex
A specialized calcium source designed to improve tissue strength, crop quality, and shelf life.
Best Application Timing
- After fruit formation
- During fruit development
- Before harvest
- When deficiency symptoms appear
Related Solution
Special Nutritional Requirements
In some situations, selecting a product only based on growth stage is not enough. Nutrient deficiencies, environmental stresses, or the need for complete nutrition require specialized solutions
Iron Deficiency (Chlorosis)
Stress Recovery
Micronutrient Deficiencies
Balanced Nutrition
Leaf Chlorosis
Identify the Cause Before Choosing a Fertilizer
Not every yellow leaf is caused by iron deficiency. Iron chelate is the best choice when chlorosis is correctly diagnosed. Symptom location, leaf age, and plant conditions are important factors in selecting the right solution. Iron deficiency usually appears first on young leaves, while yellowing of older leaves is more commonly related to magnesium deficiency or other factors.
Iron Chelate 10%
A specialized iron source designed for effective absorption, rapid chlorosis correction, recovery of green color, and foliar application during different growth stages.
Best Application Timing
- Confirmed iron deficiency
- After petal drop
- History of iron chlorosis
- Early growth season
Related Solution
Growth Recovery
Supporting Plant Regeneration
After environmental stresses such as drought, salinity, heat, cold, transplanting, or pruning, plants use part of their energy to restore essential physiological activities. Liquid Amino Acid is designed to support this recovery process and help plants return more quickly to active growth. Depending on stress conditions and plant requirements, it can be applied alone or together with nutrients and potassium as part of a complete nutrition program. However, achieving the best results always depends on proper management of stress factors and environmental conditions.
Liquid Amino Acid
A general solution designed to support plants during stress periods and recovery stages throughout the growing season.
Best Application Timing
- Transplanting
- Heat or cold stress
- Temporary drought and salinity
- Reduced growth caused by stress
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Specialized Micronutrients
For Specific Plant Requirements
Not all nutrient deficiencies occur with the same frequency. Manganese and copper become more important under specific conditions, such as certain calcareous soils or fields with a history of deficiency. These products are designed for targeted applications and provide the greatest efficiency when selected according to plant needs, soil conditions, or analysis results
Manganese Complex 18%
A specialized manganese source designed to correct deficiency and support photosynthetic and enzymatic activities.
Photosynthesis, Green color maintenance and Balanced plant growth
Copper Complex 15%
A specialized copper source designed for targeted copper supply under confirmed deficiency conditions.
Tissue strength, Enzyme activity and Plant health
Nutritional Balance
The Foundation of Sustainable Performance
n many situations, growth limitations are not caused by a single nutrient deficiency but by an imbalance in plant nutrition.
Super Micro 13 Elements Powder is designed to provide essential nutrients simultaneously, supporting balanced growth, normal plant activity, and general nutritional requirements.
This product delivers the greatest value when the problem is not limited to a single nutrient or when plants require complete and balanced nutrition.
Super Micro 13 Powder Formula
A comprehensive solution for supplying essential nutrients and supporting balanced plant growth.
Best Application Timing
- General plant nutrition
- Maintaining nutritional balance
- Possible multi-element deficiencies
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Specialized Crop Formulas
Some crops require specific nutritional approaches due to their growth characteristics and nutrient demands. Sepehr Parmis specialized formulas are designed for different agricultural and horticultural crops, making it easier to select the right nutrition strategy for each crop
