Seasol Products

Which Seasol Product Should I Use?

Different Seasol products are designed for different gardening needs. While several products support root growth, plant health and soil biology, the main difference is whether you want a general seaweed treatment, additional plant nutrition, a larger commercial-size concentrate or a more complete soil and plant treatment.

Seasol Seaweed Concentrate – Best for General Plant Health

Choose original Seasol Seaweed Concentrate if you want an easy all-round plant and soil health treatment for the home garden.

Seasol helps stimulate strong root growth and beneficial soil microorganisms, supports flowering and fruiting, reduces transplant shock and helps plants cope with stresses such as heat, drought and frost. It can be used on a wide range of plants, including vegetables, herbs, flowers, shrubs, trees, lawns and Australian natives.

Original Seasol is primarily a seaweed-based plant health treatment rather than a high-nutrient fertiliser. It can be used alongside your normal fertiliser program because healthy roots can help plants make better use of applied nutrients.

Seasol Commercial – Best for Larger Gardens and Regular Users

Seasol Commercial is a concentrated liquid seaweed plant conditioner suited to gardeners, landscapers, growers and anyone needing Seasol in larger quantities. It's twice as strong as regular Seasol.

It is a good choice when you want the root-growth, plant-establishment and stress-management benefits associated with Seasol but need economical 5L or 20L pack sizes for frequent or large-area applications.

For most small home gardens, regular Seasol is generally the more convenient option. Seasol Commercial becomes particularly useful where larger quantities are required.

Seasol Plus – Best for Seaweed Benefits Plus Added Nutrition

Choose Seasol Plus when you want more than seaweed alone. It combines Seasol with fish, humate and added nitrogen, providing both plant- and animal-derived compounds.

Seasol Plus supports root growth, flowering and plant establishment while also helping improve soil structure and microbial activity. It is a useful option for gardeners wanting a convenient product that combines Seasol's plant-health benefits with additional nutrition and soil-conditioning ingredients.

Seasol Trilogy 631 – Best for Improving Plants and Soil Together

Seasol Trilogy 631 is suited to gardeners and growers who want a stronger focus on both plant performance and long-term soil health.

It combines three beneficial components: Seasol kelp, fish extract and organic humate. This combination supports root and shoot growth, beneficial soil microorganisms, nutrient availability and soil organic matter.

Trilogy 631 can be particularly useful for intensively cultivated gardens, vegetable beds or soils where improving soil biological activity and plant growth are both priorities.

Quick Seasol Product Guide

• General garden health, transplanting and stress recovery → Seasol Seaweed Concentrate

• Large garden, landscaping or frequent seaweed applications → Seasol Commercial

• Seaweed plus added fish, humate and nutrients → Seasol Plus

• Plant growth plus a stronger focus on soil biology and soil improvement → Seasol Trilogy 631

• Mainly looking for a nutrient-rich liquid fertiliser rather than a seaweed treatment → consider PowerFeed

Seasol vs PowerFeed – What Is the Difference?

Seasol and PowerFeed perform different but complementary roles.

Seasol is primarily a seaweed-based plant health treatment. It is particularly useful for root development, plant establishment, transplant shock, stress tolerance and general plant and soil health.

PowerFeed is a fortified fish fertiliser blended with liquid humate. It provides more direct plant nutrition while also supporting soil condition, root growth, flowering and microbial activity.

For gardeners who want both plant-health support and regular feeding, Seasol and PowerFeed can form part of the same garden-care program. Products such as Seasol Plus combine some of these benefits in a single formulation.

Can Seasol Be Used When Planting or Transplanting?

Yes. One of the most useful times to apply Seasol is when planting or transplanting. Seasol encourages root development and helps reduce transplant shock, making it useful for seedlings, vegetables, flowers, shrubs and newly planted trees.

Can I Use Seasol During Hot, Dry or Cold Weather?

Seasol is commonly used to help plants cope with environmental stress, including heat, drought and frost. For best results, applications can be made as part of a regular plant-care program rather than waiting until plants are already severely stressed.

Is Seasol a Fertiliser?

Original Seasol is better thought of as a plant and soil health treatment rather than a replacement for a complete fertiliser. It helps support healthy roots and nutrient uptake, which can make your normal fertiliser program more effective.

If your main aim is providing additional nutrients for active growth, consider a product containing added fertilising ingredients such as PowerFeed or Seasol Plus.

Which Seasol Size Should I Buy?

For occasional use around a typical home garden, smaller packs of Seasol are usually the most convenient.

If you have a large garden, extensive vegetable beds, an orchard, landscaping work or apply seaweed products frequently, Seasol Commercial in 5L or 20L sizes can be more practical. The 5L size is a good step up for keen home gardeners, while 20L is better suited to very large gardens and high-volume users.

Always follow the application rates and directions on the individual product label.