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Organica Cal-Si-K – Calcium, Potassium & Silica Foliar Fertiliser

Chelated calcium, silica and potassium blend
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Organica Cal-Si-K – Calcium, Potassium & Silica Foliar Fertiliser

Chelated calcium, silica and potassium blend for fruit density and post-harvest quality.

Organica Cal-Si-K is a concentrated foliar and fertigation fertiliser combining calcium (6.2%), potassium (12%), and silica, complexed with amino acids for rapid plant uptake and nutrient efficiency.
This formulation improves fruit density, firmness and shelf-life while supporting stronger cell walls and post-harvest quality.

The low-salt, nitrate-free blend ensures compatibility with most crop programs and is particularly effective during fruit-fill and ripening stages when potassium and calcium demands are high.
Cal-Si-K is ideal for horticultural, orchard and broadacre systems requiring consistent quality, resilience and higher marketable yield.

Uses – For Fruit Quality, Density, and Shelf-Life Enhancement

Cal-Si-K is designed for fruit and vegetable crops, fruit trees and vines, pastures, turf, and broadacre crops.
It improves fruit set, finishing, and sweetness while strengthening plant tissue.
Applied as a foliar spray or fertigation supplement, it enhances nutrient translocation and stress recovery, reduces soft fruit disorders, and supports longer storage stability.

Technical Specifications
Nutrient / Parameter Typical Analysis (W/V)
Nitrogen (as conc. amino) 2.0%
Potassium (organic) 12.0%
Calcium 6.2%
Silica 0.2%
Rare Earth Minerals 0.05%
Fulvates (organic) 0.65%
Alginates 0.7%
Sugars (micro-feed) 2.0%
Filtration Filtered to 50 microns
Country of Manufacture Australia

Organica Product Packaging & Weight Specifications

Container Type Dimensions (cm / m) Weight Range Notes
20 Litre Drum 23 × 30 × 40 cm 23–27 kg (varies by product) Standard size for smaller quantities of Organica liquid formulations.
20 Litre Bucket 30 × 30 × 40 cm 23–27 kg (varies by product) Used for Organica paste, suspension, or heavy nutrient blends requiring a wider base.
200 Litre Drum 1.2 × 1.2 × 1.2 m 240–300 kg Commonly used for bulk product supply to farms and distributors.
1000 Litre IBC 1.2 × 1.2 × 1.2 m 1.2–1.6 tonnes Ideal for large-scale agricultural applications and long-term storage of Organica liquid nutrients.

*All weights are approximate and may vary depending on the Organica product composition and density.

Compatibility

Cal-Si-K is compatible with most neutral-pH liquid fertilisers and trace element solutions.
Avoid mixing with strong acids, phosphates, or sulphate-based products.
For foliar use, maintain pH between 6.0 and 7.0. Store in a cool, dry area away from direct sunlight to preserve biological activity.

Why Choose This Product

Organica Cal-Si-K provides a reliable foliar and fertigation solution for improving crop finish and post-harvest performance.
The combination of calcium, potassium and silica strengthens fruit structure, enhances nutrient transport, and boosts resilience to stress and handling.
It offers a simple, low-salt formulation that delivers rapid, visible results in both fruit quality and storage life.

Frequently Asked Questions


 
Key Features
  • 6.2% calcium and 12% potassium for balanced fruit development
  • Silica and aminos enhance nutrient absorption and cell strength
  • Ideal for fruit-fill, finishing, and quality improvement stages
  • Chelated and complexed for efficient foliar uptake
  • Free from nitrates and sulphates with a very low salt index
  • Increases fruit density, sweetness, and post-harvest firmness
  • Improves plant recovery after stress and enhances shelf-life
  • Suitable for fertigation and foliar use across all crop systems
  • Contains trace levels of rare earth minerals and fulvates
  • Manufactured in Australia and certified for organic systems
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4 Factors In Grove Management To Focus On For Next Olive Harvest

The Grove Management Plan: Essential Areas to Focus On

A successful Grove Management Plan must cover these key areas:

Irrigation

"A grove without an effective irrigation system is unlikely to deliver consistent yields year after year. Many growers still underestimate the water needs of olive trees, and few actually monitor soil moisture levels. This is why so many groves have never achieved a commercial crop."  Marcelo Berlanda Specialist Olive Consultant

Water stress negatively affects flowering, fruit set, oil accumulation (oil production), fruit size (table olives), fruit quality, and overall tree health. However, many growers lack a proper system to monitor soil moisture or manage irrigation effectively. 

Marcelo recommends:

"Growers should inspect soil moisture weekly during spring and summer, and every two weeks in autumn and winter. Use a shovel to dig at least 400mm under the tree canopy to check moisture. If the soil is hard to dig, it’s too dry – even if the canopy shows no visible signs of stress." 

Advanced soil moisture monitoring tools can also provide reliable data on a digital display or computer dashboard. 

For optimal grove health, growers must consistently check soil moisture and prevent water stress.

Nutrition

As discussed previously, taking leaf samples is essential to assess your trees’ nutritional status. This information guides the creation of a fertiliser program, a critical component for boosting or maintaining yields.

Typically, no fertiliser is needed in winter, unless you’re addressing soil amendments. However, some groves have severe nutrient deficiencies requiring fertiliser even in winter. Where proper irrigation systems aren’t in place, growers must broadcast fertiliser before rain to allow rainfall to incorporate nutrients into the soil profile, an inefficient use of resources but often the only option.

When applying fertiliser in these conditions, target the area beneath the canopy and, if possible, cultivate the soil to improve incorporation and reduce product loss.

Olives need four essential nutrients: Nitrogen, Phosphorus, Potassium, and Calcium. Check product labels carefully. As a general guideline, aim for:

Pruning

Avoid pruning during the coldest part of winter and when it’s wet or foggy to reduce the risk of bacterial and fungal disease spread.

The main goals of pruning are to remove dead wood, reduce canopy size, restore tree balance, encourage healthy new growth, and increase fruit set in spring.

Tip: After pruning, apply a copper-based spray to protect wounds from infection by fungi and bacteria.

Pest and Disease Control

Pest & disease management is crucial for sustaining yield and tree health. Winter’s colder temperatures reduce insect activity, offering a prime time to tackle pest issues.

Set up a comprehensive Pest and Disease Monitoring Program. During winter, check-marked trees (previously affected by pests or diseases) every two weeks; in spring, check weekly. Look under leaves and on new growth for signs like crawlers, yellow spots, black sooty mould, or anything unusual.

Proactive, weekly management is essential for a successful grove.

If you need further assistance, please contact us.


Global Shortage of MAP (Monoammonium Phosphate) & DAP (Diammonium Phosphate)

URGENT FERTILISER SUPPLY UPDATE – MAP & DAP SHORTAGE

Global Shortage of MAP (Monoammonium Phosphate) & DAP (Diammonium Phosphate)

This summer cropping season is facing unprecedented challenges in fertiliser supply. Availability of MAP fertiliser (monoammonium phosphate) and DAP fertiliser (diammonium phosphate) is expected to remain extremely limited worldwide, with serious implications for growers planning their nutrient programs.

Why is Fertiliser Supply Tight

China’s Export Restrictions Continue

Since 2021, China has imposed strict quotas and inspection rules on phosphate fertiliser exports to protect domestic prices and safeguard food security. 

The impact has been dramatic:

  • March 2025 exports: just 13,000 tonnes, compared with 950,000 tonnes in March 2022.
  • Q1 2025 exports: 111,000 tonnes, versus a three-year average of 785,000 tonnes.
China’s internal demand continues to climb due to increased grain production and the rapid growth of the electric vehicle industry, especially in battery manufacturing. Analysts predict that restrictions will remain in place... or even tighten... throughout 2025.

Other Suppliers Cannot Fill the Gap

Although Morocco, Russia, the USA, and Saudi Arabia also produce MAP and DAP, they cannot offset the sharp drop in Chinese exports. 

The result is:

  • Rising global fertiliser prices
  • Longer delivery lead times
  • Stricter supplier allocations
  • Reduced pricing flexibility across the summer cropping season

What This Means for Growers

For olive growers and other professional producers, the impacts are already being felt:

  • Reduced fertiliser availability for summer cropping
  • Higher input costs with delivery delays
  • Less flexibility in nutrient timing and program planning

Looking forward, risks include:
  • Reduced or cancelled fertiliser allocations
  • Possible product unavailability at short notice
  • Last-minute program changes forced by supply shortages

Our Recommendations - Secure Your Supply Now

Do not wait for traditional ordering windows. Place orders immediately and consider forward contracting for next season. Securing current pricing now helps protect your operation against higher costs and potential shortages later.

Optimise Your Nutrient Strategy

  • Review alternative phosphate fertiliser options
  • Adjust application rates where agronomically feasible
  • Consider split applications to maximise nutrient efficiency
  • Explore precision application technologies to reduce overall fertiliser requirements

Managing Phytophthora Root Rot in Australian Olive Production

Phytophthora root rot is one of the most destructive diseases affecting Australian olive groves. Caused by several Phytophthora species thriving in waterlogged soils, it can lead to root decay, canopy collapse, and even total tree death if unmanaged. This guide explores how to identify symptoms, contributing factors, and the latest integrated management practices.
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Understanding Olive Leaf Tip Dieback: Causes, Diagnosis, and Management

Discover how to diagnose and manage olive leaf tip dieback, a common issue caused by nutrient deficiencies, salinity, or environmental stress. Learn expert strategies for restoring tree health through balanced nutrition, soil and water management, and effective disease prevention — backed by The Olive Centre’s professional resources and products.
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Xylella Fastidiosa In Olive Trees: Symptoms, Spread, Management And Global Impact

Xylella fastidiosa is one of the most destructive bacterial pathogens affecting olive trees globally. Responsible for Olive Quick Decline Syndrome, it disrupts the tree’s vascular system, leading to canopy dieback, reduced fruit set, and eventual tree mortality. This in-depth guide examines symptoms, insect transmission, containment strategies, resistant cultivars, and the far-reaching economic impact on Mediterranean and global olive production.
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Solar Parks vs Olive Groves: What’s Really Happening in Spain’s “Sea of Olives”

Spain’s push for solar energy is creating tensions in Andalusia as photovoltaic projects overlap with major olive-growing landscapes.
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New Research Highlights the Health Value of Olive Oil Polyphenols

New clinical research shows olive oil polyphenols may improve metabolic health markers linked to cardiovascular disease and metabolic syndrome.
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New Grocery Supply Rules Start April 2026: What Olive Growers Need to Know

New mandatory grocery supply rules start applying from 1 April 2026, bringing stronger contract, pricing and dispute protections for olive growers supplying major supermarkets.
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Ensuring Olive Grove Security: Minimum Resource Thresholds for Secure Production Operation

A practical guide to minimum water, fuel, fertiliser and crop protection thresholds needed to maintain olive grove productivity and avoid yield losses.
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