PowerFeed vs Seasol: A Comprehensive Comparison

Written By:
Scott Carroll
Published On:
June 19, 2023
PowerFeed vs Seasol

Making an informed choice from various options to fertilise your garden might be intimidating. Due to their distinct compositions and benefits, two popular fertilisers, PowerFeed and Seasol, have garnered significant traction among gardeners. 

This article compares PowerFeed and Seasol in depth, delving into their compositions, effectiveness, usage, and how to achieve the best results from both in your garden. Let’s dig deeper into these two products so you can make an informed decision for your gardening needs.

PowerFeed overview

PowerFeed is a dynamic liquid fertiliser and soil conditioner known for its innovative formulation. PowerFeed is manufactured by Seasol International, an Australian firm known for high-quality garden goods. It contains a balanced blend of key nutrients and trace elements needed for maximum plant growth.

Composition of PowerFeed

PowerFeed’s major constituents are nitrogen (N), phosphorus (P), and potassium (K), also known as the NPK ratio, which is essential for plant growth and development. PowerFeed also contains trace elements such as iron, manganese, and zinc, which are required for specific plant functions. 

One distinctive feature is its liquid compost made from seaweed and fish, which improves soil condition and nutrient availability. Various formulas address various plant and lawn requirements.

PowerFeed benefits

Some of the key benefits of PowerFeed include:

  • Plant development is improved: A balanced NPK ratio encourages vigorous development, producing lush, healthy vegetation.
  • Enhanced flowering and fruiting: PowerFeed nutrients promote flower and fruit production, resulting in higher yields in culinary and ornamental plants.
  • Soil health: PowerFeed’s liquid composts improve soil fertility and structure by encouraging earthworm and microbial activity. This results in stronger plants and healthier roots.
  • Plant stress recovery: PowerFeed improves plant resilience to transplant shock, heat, drought, and frost damage.
  • Eco-beneficial: PowerFeed’s fish emulsion and liquid composts are sourced from organic sources, so it is an environmentally beneficial solution for gardeners.

Application tips

PowerFeed must be used correctly to gain its full benefits. Here are some pointers to help you make the most of this dynamic fertiliser and soil conditioner:

  • Always use the dilution rates stated on the box. An overly concentrated mixture could be harmful to your plants.
  • PowerFeed should be applied every two to four weeks for general care. We recommend raising this to once a week during high growth or stress periods.
  • PowerFeed is most effective when used in the early morning or late afternoon. Avoid the hottest part of the day, when plants are most susceptible to stress.
  • PowerFeed can be applied through foliar spraying or soil drenching. When foliar feeding, spray both the tops and bottoms of the leaves for maximum absorption.
  • PowerFeed is suitable for use all year. However, it is especially useful when plants have higher nutritional demands during the growing season.
  • A few days before planting or transplanting, apply PowerFeed to your soil. This improves soil structure and nutritional content, giving your plants a head start.

Remember that a good fertilising regimen is only one component of a comprehensive gardening approach. Regular watering, insect control, and trimming are all essential for keeping plants healthy and vibrant.

Seasol overview

Seasol is another well-known gardening product for its root-boosting and plant-health-improving characteristics. It is a liquid seaweed concentration high in trace elements and organic compounds that acts as a plant tonic.

Composition of Seasol

Seasol is a plant growth-stimulating organic seaweed concentrate made from Durvillaea Potatorum seaweed extract. Its trace nutrients, natural growth stimulants, and alginic acid help plants build strong roots and resist heat, drought, frost, pests, and diseases. Seasol, which does not contain NPK nutrients like normal fertilisers, improves plant health and vigour as a supplement.

Remember, Seasol products have similar underlying components but may vary in composition. The product label contains composition and usage information.

Seasol benefits

Some key benefits that we enjoy from using Seasol include:

  • Health enhancer: Seasol enhances overall plant health as a strong plant tonic. It helps to increase plant immunity, making them resistant to pests, diseases, and changing weather conditions.
  • Root growth: Seasol’s capacity to promote root growth is one of its major advantages. It encourages the development of a strong root system, which improves the plant’s ability to absorb nutrients and water.
  • Environmental stress mitigator: Seasol improves plant resilience to environmental challenges. Heat, dryness, frost, or salinity are all situations that Seasol can help plants tolerate.
  • Fruit and flower promoter: Seasol promotes blooming, fruiting, health, and resilience. Improved plant vitality can contribute to higher production in fruit and flower-bearing species.
  • Soil conditioner: Seasol functions as a soil conditioner, improving soil structure and increasing the activity of beneficial soil microbes, similar to PowerFeed. This produces healthier soil, which is better for plant growth.

Seasol works well as a stand-alone product but can also be combined with other fertilisers for a more comprehensive approach to plant nutrition. Its numerous advantages make it a vital addition to any gardener’s arsenal.

Application tips

Seasol’s application procedure is simple and easily integrated into any gardening routine. Here’s a step-by-step guide to using Seasol:

  • Putting the concentrate together: If you are using Seasol concentration, it must be diluted with water before use. The typical rule of thumb is to combine 50 ml of Seasol with 9 litres of water. However, for detailed directions, always refer to the product’s label.
  • Regarding plants: The diluted Seasol solution can be applied directly to the foliage (leaves) and soil around the plants. The solution is gentle and will not burn the leaves, making it suitable for all plants.
  • Application frequency: For optimal results, apply Seasol every two to four weeks. Regular application can aid in improving plant health, stimulating growth, and increasing resistance to environmental challenges.
  • Best time to use: To avoid quick evaporation, use Seasol early in the morning or late in the afternoon. Avoid using it during the hottest part of the day.

Seasol can be applied with a watering can, a hose-on sprayer, or a backpack sprayer. 

Choose the strategy that best suits your garden size and personal preferences. If you’re overwhelmed with choices, fear not! Head to our guide on the best watering cans in Australia to help you make the right choice.

Remember that even though Seasol is mild on plants, following the prescribed dosage recommendations is still critical. Overuse will not necessarily cause harm, but it may cause nutrient imbalances in your soil.

Key differences between PowerFeed and Seasol

Nutrient Composition

While PowerFeed and Seasol are often used in gardening and horticulture, their nutrient contents differ. PowerFeed is a fertiliser because it is high in nitrogen, phosphorus, potassium, and trace elements. It promotes healthy plant development and flowering.

Seasol, conversely, is a seaweed concentrate rather than a fertiliser. It contains naturally occurring growth stimulants and trace nutrients, which can improve plant health and tolerance to environmental challenges. It lacks the high quantities of nitrogen, phosphorus, and potassium in PowerFeed.

Primary functions

PowerFeed’s primary job is to provide plants with a balanced variety of necessary nutrients, supporting lush growth, robust root systems, and prolific flowering and fruiting.

Meanwhile, Seasol serves a distinct purpose. Its primary function is as a soil conditioner and plant health tonic. It promotes root formation, increases plant resilience to heat, drought, frost, pests, and diseases, and increases plant vitality overall.

Plant response

As PowerFeed and Seasol differ in composition and function, the responses they elicit in plants also vary. PowerFeed’s high nutritional concentration can stimulate growth quickly, making it perfect for plants in growth or need of a nutrient boost.

Seasol, on the other hand, acts more slowly, generating moderate but long-term gains in plant health and resilience. As a result, Seasol is a fantastic choice for long-term garden health and for assisting plants in recovering from stress or harm.

Both products have distinct advantages, and combining them can help gardeners achieve a well-rounded nutrient management plan.

Combining PowerFeed and Seasol for optimal results

A well-balanced approach that includes both PowerFeed and Seasol can dramatically improve the health and productivity of your garden. PowerFeed, as a complete fertiliser, supplies plants with all the nutrients they require for growth and development. Seasol, a strong seaweed extract, on the other hand, boosts the plant’s general resilience and improves its ability to absorb nutrients, complementing PowerFeed’s purpose.

By combining these two items, you feed your plants and increase the soil’s structure and fertility. This simultaneous effect promotes faster development, more flowering and fruiting, and increased resilience to environmental challenges, diseases, and pests.

Application guidelines

Applying both products correctly maximises their benefits. Apply Seasol to the soil every two weeks year-round for upkeep. Plant stress, planting, and transplanting require more use.

PowerFeed should be given every two weeks during growth and less often during dormancy. These are general guidelines, but plant kinds, soil conditions, and needs may affect application rates.

Combining both products can produce great effects. For instance, apply Seasol shortly after planting to promote robust root growth and PowerFeed a week or two later to add nutrients.

These chemicals are helpful but don’t replace regular irrigation, soil management, and pest control.


Ultimately, both PowerFeed and Seasol provide significant advantages for your garden. PowerFeed’s potent blend of macro and micronutrients, fish emulsion, and liquid compost promotes robust plant and root growth while improving soil structure. Seasol’s seaweed-derived composition focuses on increasing plant stress resilience and general health.

These items together can give a full feeding programme, improving the soil and encouraging resilient, vigorous plant life. Each has specific benefits that complement the other, making them a fantastic combination for gardeners looking for healthier, more vigorous plants.

If you’re still looking for comparisons on fertilisers, check out our guide on Charlie Carp vs Seasol or GOGO Juice vs Seasol!