YaraAmplix OPTIFRESH 5L
Crop quality, stress resilience and better post-harvest fresh-weight retention—built during crop growth.
OPTIFRESH is applied during crop growth through soil fertigation or soil drench. It can be incorporated into a concentrated nutrient stock tank for irrigation use. It is not a post-harvest fruit dip, preservative or surface coating.
Soil-grown crops only: the Malaysian label does not recommend OPTIFRESH for hydroponic or substrate systems.
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What is YaraAmplix OPTIFRESH?
A specialised fertigation biostimulant combining Ascophyllum nodosum seaweed-derived bioactive compounds with nitrogen, potassium and EDTA-chelated micronutrients. It supports plant metabolism and abiotic-stress tolerance from flowering through harvest, helping crops achieve stronger marketable quality.
Supports Crop Quality
Helps crops maintain physiological activity, fruit development and marketable fresh weight.
Abiotic-Stress Support
Seaweed bioactives and micronutrients support antioxidant defence and plant resilience.
Nutrient-Stock Compatible
Designed for practical soil fertigation and tested with concentrated nutrient stock containing CN, PN and Fe.
What is Ascophyllum nodosum?
Ascophyllum nodosum is a species of brown seaweed that grows naturally on rocky North Atlantic shores. It is a marine alga—not a terrestrial grass—and is recognisable by its olive-brown fronds and small air bladders.
It lives in the intertidal zone, where it repeatedly experiences salt water, air exposure, sunlight, cold and changing moisture conditions. The Malaysia training explains that this demanding environment influences its chemical composition and encourages the formation of stress-related bioactive compounds.
Seaweed-Derived Bioactive Compounds
Mannitol & Alginates
Seaweed-derived compounds included in the OPTIFRESH bioactive complex and associated with plant water relations and stress response.
Fucoidan & Polyphenols
Bioactive compounds highlighted in the training for their role in supporting plants under abiotic-stress conditions.
Amino Acids + Mineral Nutrients
A combined bioactive-and-nutrient formulation intended to support crops during periods of high metabolic demand.
Support Against Oxidative Stress
Cold, drought and other abiotic stresses can increase reactive oxygen species (ROS), often described as free radicals, in plant tissues. Excess ROS may disrupt normal cellular and metabolic processes.
According to the Malaysia training, OPTIFRESH combines seaweed bioactive compounds with mineral nutrients to directly support the plant's ability to neutralise ROS and continue growing under stress.
- Supports crops under cold and drought stress
- Provides support during periods of high metabolic demand
- Helps maintain crop yield and quality under challenging conditions
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Key Composition
Based on the YaraAmplix Malaysia product training information:
- Ureic Nitrogen (N): 71 g/L
- Potassium Oxide (K₂O): 13 g/L
- Zinc (Zn): 30 g/L — 100% EDTA-chelated
- Manganese (Mn): 20 g/L — 100% EDTA-chelated
- Copper (Cu): 10 g/L — 100% EDTA-chelated
- Molybdenum (Mo): 1.2 g/L
Seaweed-Derived Bioactive Compounds
In addition to the declared mineral nutrients, OPTIFRESH contains an Ascophyllum nodosum-derived bioactive complex highlighted in the Malaysia training:
Individual concentrations for these bioactive compounds are not stated in the cited Malaysia training; they are therefore presented as formulation components, not guaranteed-analysis values.
How OPTIFRESH Supports Freshness
OPTIFRESH works through crop physiology before harvest. It does not form a coating on harvested fruit.
Osmotic Regulation
Potassium and seaweed-derived compounds support water relations, osmotic balance and cell turgor during crop growth.
Antioxidant Defence
Zn, Mn and Cu contribute to enzyme systems involved in protection against oxidative stress and cellular damage.
Cellular Integrity
Improved stress tolerance may help maintain membrane and tissue condition, supporting hydration and quality at harvest.
Suitable Crops & Use Window
- Soil-grown chilli, tomato and other fruiting vegetables
- Soil-grown soft fruits
- Soil-grown lettuce, herbs and leafy vegetables
- Soil-grown ornamentals, medicinal and aromatic crops
- Woody perennial crops rooted in soil
Flowering crops: Apply from flowering through the harvest period.
Other crops: Apply after planting through harvest.
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| Soil-fertigation route | Malaysian label direction | Application window |
|---|---|---|
| Standard soil fertigation | 7–20 L/ha per season 2–5 L/application |
Determine the programme according to crop requirements and nutritional status. |
| With YaraLiva CALCINIT | 1–3% | Use according to the current label and the farm's nutrient programme. |
| 100× concentrated stock solution Tank A or Tank B |
1–3 L OPTIFRESH per 1,000 L stock solution | Deliver through the soil-fertigation system. |
Direct Soil Application
Apply through soil fertigation or soil drench. The Malaysian label gives a general programme of 7–20 L/ha per season, normally 2–5 L per application, according to crop requirements and nutritional status.
Tank A or Tank B
Add 1–3 L per 1,000 L of 100× concentrated stock solution in Tank A or Tank B, then deliver the diluted nutrient solution to crops rooted in soil.
Kulai Chilli Trial Programme
The Malaysia soil-drench trial used 2 L/ha per application, for 3 applications at two-week intervals from flowering to harvest—a total of 6 L/ha.
Tank A, Tank B & CALCINIT Mixing Guide
The Malaysian label permits addition to either 100× stock tank for subsequent irrigation of soil-grown crops. Select the tank according to the farm's nutrient programme and keep the stock-solution pH within the stated range.
- Tank A (calcium): pH 3.5–6.0
- Tank B (phosphate and/or sulfate): pH 3.5–5.0
- OPTIFRESH rate: 1–3 L per 1,000 L of 100× stock solution in Tank A or Tank B
- Final-solution equivalent: 1–3 mL per 100 L final nutrient solution
- With YaraLiva CALCINIT: 1–3%
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Stock-Solution Stability & Compatibility
The Malaysia training includes compatibility observations with calcium nitrate and concentrated nutrient stock. These tests support practical tank use while also showing why prolonged storage is discouraged.
| Test | Observation | Practical meaning |
|---|---|---|
| 1% and 3% v/v with calcium nitrate | Compatible after 1 hour and 3 days | Supports short-term preparation and fertigation use. |
| 1% v/v after 14 days | Compatible | Mixture remained acceptable under the tested conditions. |
| 3% v/v after 14 days | Very small amount of sediment | Longer storage may require agitation. |
| 1% and 3% v/v after 28 days | Small amount of sediment; readily remixed after agitation | Physical remixing was possible, but long storage is not recommended. |
| 3 L/1,000 L with CN, PN and Fe stock | Training observation included concentrated-stock compatibility | Supports addition to a nutrient stock tank for soil fertigation. |
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Malaysia Chilli Trial
The Malaysia training trial in Kulai, Johor evaluated the effect of soil-drenched OPTIFRESH on red-chilli yield and quality. Chilli was planted on 20 October 2025 and red fruit was harvested on 14 January 2026.
- Plot size: 30 m × 1.2 m planting bed
- 53 plants per treatment
- Soil type: clay soil
- Programme: 2 L/ha per application, 3 applications
- Timing: flowering to harvest, at 2-week intervals
- Total applied: 6 L/ha
Trial results are specific to the stated crop, location, programme and conditions. They are not a guarantee of identical performance on every farm.
What Did the Kulai Trial Show?
Higher Total Fruit Weight
Total red-chilli weight per plant from two harvests was approximately 36% higher with OPTIFRESH under the trial conditions.
Heavier Individual Fruit
Red chillies of similar length recorded a higher average individual fruit weight with OPTIFRESH.
Better Weight Retention
At room temperature, treated samples lost approximately 4 percentage points less weight after seven days. At day three, weight loss was approximately 5% versus 7%.
Label Precautions, Safety & Storage
Application Conditions
Avoid rapid-drying or extremely slow-drying conditions, frost, rain or expected rain. Where practical, treat during the cooler hours of the day to support absorption.
Personal & Equipment Safety
Wear suitable gloves and a face shield when handling. Clean all application and mixing equipment after use. Refer to the current Safety Data Sheet for complete safety information.
Product Storage
Keep in a cool, dry chemical store, away from children and livestock. Protect from temperatures below −5°C and above 40°C.
Frequently Asked Questions
Is OPTIFRESH a post-harvest preservative?
No. It is applied during crop growth through fertigation or soil drench. It supports the crop before harvest and is not a fruit dip, disinfectant or edible coating.
Does OPTIFRESH prevent fungal or bacterial spoilage?
It is not positioned as a fungicide or bactericide. The available Malaysia training trial measured yield, fruit weight and post-harvest weight loss—not pathogen control.
How can it help reduce post-harvest weight loss?
Its seaweed-derived bioactives, potassium and chelated micronutrients support osmotic regulation, antioxidant defence and plant stress tolerance. These effects may help harvested produce begin storage with better tissue hydration and integrity.
Can OPTIFRESH be used in hydroponics or substrate systems?
No. Although the training discusses nutrient recalculation for such systems, the current Malaysian label specifically states that OPTIFRESH is not recommended for hydroponic and substrate systems. The label takes priority.
Can OPTIFRESH be added to a concentrated fertiliser stock tank?
Yes, for subsequent soil fertigation. The Malaysian label gives 1–3 L OPTIFRESH per 1,000 L of 100× stock solution in Tank A or Tank B. The Malaysia training also reports compatibility testing with CN, PN and Fe stock. Do not store the prepared mixture for more than two weeks.
Can it be mixed with calcium nitrate?
The Malaysian label permits use in combination with CALCINIT at 1–3%. Malaysia training observations showed compatibility at 1% and 3% v/v, although some sediment appeared after extended storage. Follow the label and avoid keeping the prepared stock solution for more than two weeks.
Will every crop gain the same yield or shelf-life result?
No. Performance varies with crop, variety, climate, nutrition, irrigation, harvest maturity and storage conditions. Trial figures indicate the direction of response under the tested conditions and are not fixed guarantees.
What is the difference between OPTIFRESH and a normal seaweed fertiliser?
OPTIFRESH combines Ascophyllum nodosum-derived bioactives with a defined package of N, K, Zn, Mn, Cu and Mo; Zn, Mn and Cu are EDTA-chelated. Its positioning focuses on crop quality, stress resilience and post-harvest fresh-weight retention through pre-harvest crop management.
Enquire About YaraAmplix OPTIFRESH 5L
Contact Swee Chiang Hardware Sdn Bhd, Kluang, Johor for product availability and crop-application guidance in Malaysia.
WhatsApp Product EnquiryProduct information is compiled primarily from YaraAmplix Products Training – Malaysia and is intended for general technical and marketing reference. Always follow the current Malaysian product label. Rates, compatibility and suitability may vary by crop, water quality, nutrient programme and growing system. YaraAmplix and OPTIFRESH are trademarks of their respective owner.