Athena Stack 1 Gallon

Athena Stack – Kelp-Based Root & Bloom Enhancer

Athena Stack is a natural, kelp-based plant supplement designed to support healthy root development, vigorous vegetative growth and flowering. Formulated using kelp extract and naturally derived ingredients, Stack provides additional nutritional support during important stages of plant development.

Part of the popular Athena Nutrients range, Stack can be applied as a foliar spray or root drench, making it a versatile addition to an existing feeding programme. It is particularly useful during the transition from vegetative growth into flowering, when plants undergo significant changes in their growth and nutritional requirements.

Athena Stack can also be used during propagation, seed treatment and transplanting, helping growers support plant establishment and maintain healthy growth during these demanding stages.

Suitable for hydroponics, coco coir and soil-based growing systems, Stack is designed to complement regular base nutrients rather than replace them.

Key Features & Benefits

• Natural kelp-based formula: Contains kelp extract and naturally derived ingredients to support plant development.
• Supports healthy root growth: Helps maintain vigorous root development and plant establishment.
• Encourages vegetative growth: Provides additional nutritional support during periods of active plant development.
• Supports flowering: Designed for use during the transition into flowering and the early flowering stage.
• Root drench or foliar application: Flexible application methods to suit different growing systems.
• Useful during transplanting: Can help plants recover from transplant stress and establish in their new growing medium.
• Seed treatment option: Can be used as a diluted seed soak before planting, following the manufacturer's instructions.
• Additional potassium support: May help address minor potassium deficiencies as part of a balanced nutrient programme.
• Compatible with regular feeding: Can be incorporated into existing nutrient solutions when used as directed.

Why Use Athena Stack?

Plants experience different nutritional demands throughout their growing cycle. During propagation, transplanting and the transition into flowering, maintaining healthy roots and consistent growth is particularly important.

Athena Stack has been developed to provide additional support during these stages using naturally derived kelp extract.

Kelp-based supplements are commonly used in horticulture because they contain a range of naturally occurring compounds that may influence plant development and responses to environmental stress.

Stack is designed to complement a complete nutrient programme, helping growers support plant vigour without replacing essential base fertilisers.

Its versatility also makes it useful for growers who want a single supplement that can be applied through irrigation or directly to foliage, depending on the growth stage and application requirements.

What Are the Benefits of Kelp Extract?

Kelp extracts are widely used in horticultural biostimulant products. They contain naturally occurring organic compounds that can influence plant growth and development.

Depending on the kelp source, extraction process and crop being grown, these compounds may contribute to several beneficial plant responses.

• Root development: Kelp-based products may encourage root growth and help plants establish after transplanting.
• Plant vigour: Can support healthy growth during periods of active development.
• Stress tolerance: Certain kelp extracts may help plants respond to environmental stresses.
• Nutrient efficiency: May influence nutrient uptake and utilisation under suitable growing conditions.
• Flowering support: Can complement a balanced feeding programme during the transition into reproductive growth.

Responses to kelp-based supplements vary depending on plant species, growing conditions and application rates. Stack should be used alongside appropriate nutrition, irrigation and environmental management.

When Should You Use Athena Stack?

Athena Stack is designed for use during several important stages of plant development.

For regular feeding applications, Athena recommends beginning during the final week of vegetative growth and continuing through approximately weeks four to five of flowering, or until plants have completed their main period of vertical growth.

Foliar applications should be stopped earlier, with Athena recommending that spraying does not continue beyond week three of flowering.

Stack can also be used for specific seed treatment and transplant applications where appropriate.

How to Use Athena Stack

Athena Stack can be applied as a root drench, foliar spray, transplant treatment or seed soak. Always use the appropriate dilution for the intended application.

Because Stack contains organic ingredients, some separation may occur during storage. Shake thoroughly before every use.

Athena Stack Dosage Guide

These rates are based on the supplied Athena application guidance. Always check the current product label and feeding schedule before use.

Using Athena Stack as a Root Drench

Recommended dosage: 1–2ml per 4 litres of water, once weekly.

Root drenching allows Athena Stack to be delivered directly into the growing medium or root zone.

Stack can be mixed with your regular nutrient solution, making it convenient for growers using hydroponic reservoirs, coco coir or soil-based feeding programmes.

1. Prepare your normal nutrient solution using clean water.
2. Add your base nutrients and other compatible additives according to their instructions.
3. Shake Athena Stack thoroughly.
4. Add the required amount of Stack as the final supplement.
5. Mix thoroughly to distribute the product evenly.
6. Check and adjust the final pH as required.
7. Apply through your normal irrigation method.

Stack contains organic ingredients, so growers using fine drippers or automated irrigation systems should maintain appropriate filtration and regularly inspect their equipment.

Using Athena Stack as a Foliar Spray

Recommended dosage: 7ml per 4 litres of water, once weekly.

Foliar application allows the diluted product to be applied directly to plant leaves during suitable stages of growth.

For best results:

• Use clean water and a suitable foliar sprayer.
• Shake the bottle thoroughly before measuring.
• Mix the required quantity of Stack into the water.
• Apply an even spray to suitable foliage surfaces.
• Spray with grow lights switched off or during a suitable low-light period.
• Allow foliage to dry before returning plants to intense lighting.
• Do not continue foliar applications beyond week three of flowering.

Test a small area before treating sensitive crops. Avoid spraying under intense heat or onto flowers and fruit unless the current product instructions specifically permit it.

Athena Stack for Transplanting

Recommended dosage: 2ml per 4 litres of water.

Transplanting can temporarily interrupt root function while plants adapt to their new growing medium and environment.

Athena Stack can be used as a diluted root treatment during transplanting to provide additional support during plant establishment.

For suitable bare-root plants, prepare the diluted solution and soak the roots for approximately 30–60 seconds before transplanting.

Alternatively, apply the diluted solution to the growing medium immediately after transplanting.

Handle roots carefully and avoid unnecessary disturbance. Correct irrigation, suitable temperatures and good growing conditions remain essential for successful transplant establishment.

Athena Stack for Seed Treatment

Recommended dosage: 4ml per 4 litres of water.

Athena Stack can also be used as a diluted seed treatment before planting.

Prepare the solution and soak suitable seeds for approximately 1–2 minutes before sowing, following the manufacturer's instructions.

Kelp-based treatments may support early plant establishment in some crops, although results vary depending on seed type, seed quality and growing conditions.

Always check whether seeds have already been treated or coated, as additional soaking may not be suitable for every variety.

Suitable Growing Systems

Athena Stack can be incorporated into compatible feeding programmes across a range of growing methods, including:

• Hydroponic growing systems
• Deep Water Culture (DWC)
• Recirculating hydroponic systems
• Coco coir growing media
• Rockwool and other soilless substrates
• Soil-based growing systems
• Drip irrigation and automated feeding systems
• Indoor growing environments and greenhouses

As Stack contains organic ingredients, check compatibility with systems designed specifically for low-organic or sterile nutrient solutions.

Tips for Best Results

• Shake thoroughly before every use, as natural separation may occur.
• Use clean measuring equipment to avoid contamination.
• Follow the appropriate dilution for each application method.
• Apply root drenches no more frequently than recommended.
• Add Stack last when preparing a nutrient reservoir.
• Check and adjust pH after mixing all nutrients and additives.
• Monitor EC and plant health throughout the growing cycle.
• Avoid foliar spraying under intense lighting or excessive heat.
• Stop foliar applications after week three of flowering.
• Maintain clean irrigation equipment and suitable filtration.
• Follow the current Athena feeding schedule for your crop and growing system.

Storage Instructions

Store Athena Stack in its original container with the lid securely closed. Keep in a cool, dry location away from direct sunlight and extreme temperatures.

Because Stack contains naturally derived organic ingredients, some separation may occur during storage. Shake thoroughly before use and follow the storage instructions printed on the product label.

Buy Athena Stack at GHEDirect

We stock a comprehensive range of Athena nutrients and additives, including products from the Athena Blended Line and Pro Line, helping growers find the right products for every stage of plant development.

Whether you're propagating young plants, growing in coco coir or managing a hydroponic system, our experienced team is available to offer practical advice on plant nutrition, root development and feeding programmes.

Order online for fast UK delivery or visit The Greenhouse Effect in Milton Keynes to explore our range in store.