TerraCottem Complement 20kg

TerraCottem Complement is a premium professional soil conditioner developed to improve soil performance and maintain the benefits of previous TerraCottem Universal applications. Ideal for flower beds, raised beds and vegetable gardens, this advanced soil amendment combines volcanic lava, water-absorbing polymers, NPK fertilisers, essential trace elements and plant biostimulants to create healthier growing conditions.

Working directly within the root zone, TerraCottem Complement helps plants establish stronger root systems while improving soil structure, nutrient availability and moisture retention. The specialised blend stores water and nutrients close to plant roots, allowing them to be released when required, helping reduce irrigation requirements whilst promoting vigorous, healthy growth.

Where planting areas have previously been treated with TerraCottem Universal, Complement replenishes nutrients and components naturally removed over time through plant growth and replacement, helping maintain long-term soil performance.

Suitable for professional landscapers, gardeners, horticulturalists and home growers alike, TerraCottem Complement offers an effective solution for improving plant establishment, increasing drought resilience and supporting sustainable gardening practices.

Features & Benefits

Professional Soil Conditioner

Developed specifically for flower beds, raised beds and vegetable gardens to improve soil quality and long-term plant performance.

Improves Water Retention

Water-absorbing polymers retain moisture within the root zone, helping reduce watering frequency and improving drought resilience.

Enhances Soil Structure

High volcanic rock content improves soil aeration and drainage whilst encouraging healthier root development.

Promotes Strong Root Growth

Biostimulants encourage root hair development, improving water and nutrient uptake.

Added Plant Nutrition

Contains balanced NPK fertiliser (2-1-2) together with essential micronutrients to support healthy growth.

Ideal for Previously Treated Beds

Designed to replenish components lost from soils previously treated with TerraCottem Universal.

Sustainable Water Savings

Can contribute to irrigation water savings of up to 50% when used correctly.

Suitable Applications

TerraCottem Complement is recommended for:

• Flower beds

• Raised beds

• Vegetable gardens

• Ornamental planting

• Seasonal bedding plants

• Borders

• Community gardens

• All planting areas previously treated with TerraCottem Universal

Not intended for: new tree planting, shrubs, lawns or sports turf where TerraCottem Universal is recommended due to its higher polymer content.

How TerraCottem Complement Works

TerraCottem Complement activates whenever the soil receives water.

Its water-absorbing polymers capture and store water together with dissolved nutrients, creating a reserve within the root zone. At the same time, biostimulants encourage the development of fine root hairs which grow through the hydrated polymer particles.

As roots develop, plants are able to access stored moisture and nutrients more efficiently, improving establishment, encouraging stronger growth and increasing resilience during periods of drought or environmental stress.

The volcanic rock also improves soil structure and aeration, supporting healthy root development and long-term soil health.

Application Rates

When to Apply

• At planting

• Immediately before sowing or seeding

• As an annual maintenance treatment after the first growing season where TerraCottem Universal has previously been applied

Composition (By Weight)

Guaranteed Nutrient Analysis

NPK Analysis: 2-1-2

Contains trace elements including Boron (B), Copper (Cu), Iron (Fe), Manganese (Mn), Molybdenum (Mo) and Zinc (Zn).

Product Type Soil Conditioner

Bag Size 20kg

Suitable For Flower Beds, Raised Beds, Vegetable Gardens, Previously Treated TerraCottem Universal Areas

Application Method Mix into soil or apply as directed

Water Retaining Polymers 7.5%

Volcanic Rock Content 81.75%

Fertiliser Analysis NPK 2-1-2

Contains Biostimulants Yes

Contains Micronutrients Yes

Water Saving Potential Up to 50%*

Professional Use Yes