Anti-Stress Fertiliser: Getting Plants Through Cold, Heat and Drought

What is plant stress?

Anti-stress fertiliser has become one of the most closely watched product categories in modern agriculture. The reason is simple: with climate change, abiotic stress events · frost, extreme heat, drought, salinity · are occurring more often and more severely.

Plant stress arises when a plant is exposed to environmental factors that deviate from its normal growing conditions. Under stress the plant first slows its growth, then activates its defence mechanisms. Through this process yield falls and fruit quality deteriorates.

Types of stress and their effects

Cold and frost stress

At temperatures below 0°C, ice crystals form in plant tissue and cell membranes are damaged. When the damage is rapid, intervention is impossible · which is why building stress tolerance ahead of frost is critically important.

Heat and drought stress

Above 35°C the plant increases transpiration and closes its stomata. Photosynthetic efficiency falls. Combined with drought, protein synthesis stops and early senescence and fruit drop begin. This stress is widespread in summer across Türkiye's Mediterranean-climate regions.

Salinity stress

A high salt concentration in the soil makes water uptake difficult for the plant (osmotic stress). Salinity caused by over-fertilisation is a significant problem in greenhouse production.

How does an anti-stress fertiliser work?

Anti-stress fertilisers combine macro and micro elements, amino acids, organic acids and biostimulants. They act through several channels:

• Osmotic regulation: potassium and zinc raise the level of dissolved solutes inside the cell, increasing the plant's water-holding capacity
• Antioxidant enzyme activation: free radicals that increase under stress are neutralised by enzymes containing zinc and manganese
• Cell wall reinforcement: calcium and boron strengthen the cell wall against mechanical damage
• Photosynthetic efficiency: iron and magnesium support chlorophyll synthesis

What Casablanca provides under stress

The Casablanca formulation is a comprehensive combination of trace elements and natural disinfectants produced from naturally sourced raw materials. Observed effects of application under stress:

• Applied before frost, cell sap concentration rises and the freezing point falls
• Chlorophyll loss slows in extreme heat
• Recovery after irrigation following drought is faster
• The Na/K ratio is balanced in plants experiencing salt stress

Timing an anti-stress application

An anti-stress application should be proactive, not reactive. An application made in anticipation of stress is far more effective than one made after the event.

• Before frost: apply 48–72 hours ahead when the forecast shows 0°C
• Before a heatwave: apply early the following morning when temperatures above 35°C are expected
• After transplanting: within 3–5 days of setting out seedlings
• After spraying: a recovery application 48–72 hours after a fungicide or insecticide

Practical rate

The recommended anti-stress rate for Casablanca is 150–200 ml per 100 L of water as a foliar spray. Apply early in the morning or after sunset. Under stress conditions, weekly repetition is recommended.

Frequently asked questions

When is an anti-stress fertiliser applied?

The most effective application is made before the stress event · 48–72 hours ahead of expected frost, heatwave or drought. Applications after the event speed up recovery but are not as effective as prevention.

Which fertiliser is used in drought?

A balanced foliar fertiliser containing potassium, zinc and calcium should be used. Nitrogen fertilisation should be restricted during stress periods because it forces vegetative growth.

What can be done for a plant damaged by extreme heat?

Apply zinc + iron foliarly in the cool of early morning. Adjust irrigation and restrict nitrogen. The plant can be shaded for a few days.

Is anti-stress fertiliser organic?

Casablanca is produced from naturally sourced raw materials and is suitable for residue-free agriculture. If you produce for export you can request a residue analysis.