How soon after spraying Seaweed Secrets can I mow?

It’s best to give your lawn 8–12 hours after application before you mow. The longer you leave it, the better.

Should I mow my lawn before or after application?

It’s best to apply after mowing for maximum leaf absorption.

How often should I apply this product?

Seaweed Secrets should be applied every 2–4 weeks, or weekly if required during periods of stress or active growth.

How much of this product should I apply?

The standard application rate is 75–100ml per 100m², diluted in water.

Which method of application is better for Seaweed Secrets: Hortex sprayer or backpack sprayer?

Either is effective. For backpack or pressure sprayers, water-in lightly. With a Hortex, watering-in isn’t necessary as it’s done simultaneously.

Can I use Seaweed Secrets on all lawn types?

Yes, Seaweed Secrets is safe for all Australian lawn types including buffalo, couch, kikuyu, and zoysia.

What does Seaweed Secrets do for my lawn or garden?

It enhances root growth, improves drought and stress resistance, stimulates beneficial microbes, and promotes greener, more resilient turf and plants.

Can I use Seaweed Secrets in summer?

Yes, Seaweed Secrets is ideal during hot weather as it helps reduce stress, improve water retention, and boost plant resilience.

Is Seaweed Secrets organic?

It is made from cold-processed Ascophyllum nodosum seaweed, sustainably harvested and naturally processed. While not certified organic, it’s a natural bio-stimulant.

Can I combine Seaweed Secrets with other fertilisers?

Yes, it’s highly compatible with most fertilisers and soil conditioners, including Activ8EXTRA, Quantum H, and Stimulizer. Always jar-test if unsure.

Is Seaweed Secrets safe for pets and kids?

Yes, once the product has dried after application, it’s safe for children and pets to access treated areas.

Seaweed Secrets - Concentrated Liquid Kelp with added fulvic

Seaweed Secrets - 1L

Use much less per square metre than major brands

Seaweed Secrets is a concentrated liquid seaweed fertiliser and soil conditioner enriched with humic and fulvic acids. It promotes stronger roots, healthier growth, improved nutrient uptake and greater resilience to environmental stress for lawns, gardens

Seaweed + Humic + Fulvic Biostimulant Improves Stress Resistance & Root Growth Fixes Plant Stress & Slow Recovery

Lawns Gardens Farms

Premium Liquid Seaweed Soil Conditioner with Kelp, Humic & Fulvic Acid

For Healthier Soil, Stronger Plants & Greener Lawns, Naturally. Seaweed Secrets isn’t your average seaweed fertiliser, it’s a supercharged soil conditioner that supports your plants from early stages to full bloom. Infused with powerful Ascophyllum nodosum kelp, humic acid and fulvic acid, this liquid formula nourishes the soil and strengthens plants at every stage of growth. Whether you’re caring for a veggie patch, flower bed, fruit tree, or a buffalo or kikuyu lawn, Seaweed Secrets helps you grow lush, resilient plants with deeper roots and vibrant growth, all while staying eco-friendly and safe around pets and kids.

Seaweed Secrets is more than just a fertiliser, it’s a soil conditioner that enhances the long-term health and fertility of your garden and lawn. By improving soil structure, increasing moisture retention, and supporting beneficial soil organisms, Seaweed Secrets creates an ideal environment for plants to thrive.

Moved from more expensive products to seaweed secrets and getting the same results. Great value and ease of use is a bonus.

— Jason

Why choose Seaweed Secrets:

Made with Premium Kelp (Ascophyllum nodosum) – Naturally rich in over 70 minerals, amino acids, and plant growth hormones
Enhanced with Humic & Fulvic Acids – Improves nutrient availability, root development, and soil structure
Safe, Organic, and Sustainable – Ideal for eco-conscious gardeners and sustainable farms
Works Through the Whole Lifecycle – From early growth to flowering, fruiting, and recovery
Pet- and People-Safe – Non-toxic and gentle on the environment

Nutrient Profile:

Nitrogen

0.04–0.07%

Phosphorus

0.05–0.15%

Potassium

2500–6000 ppm

Sulphur

400–1200 ppm

Magnesium

<0.40%

Calcium

<0.01%

Boron

0.13%

Iron

<0.10%

Zinc

1–5 ppm

Soil pH

8–9

Contains naturally derived macro, secondary & trace elements
Rich in kelp-derived bioactive compounds and plant growth stimulants
Designed to enhance nutrient uptake and plant performance, not replace fertiliser

If you're looking for a natural way to grow stronger, more resilient plants and improve your soil in the process, Seaweed Secrets is your go-to. From home gardeners to commercial growers, it's the eco-friendly edge your lawn, garden or farm deserves.

	Specific Use	Rate	Frequency	Notes
General:	Lawn and Garden:	100ml/100m2
Home Gardener:	General:	1ml per 1sqm 100ml per 100sqm	Apply fortnightly or as required.
Broadacre:	General:	6 - 10 Litres per hectare in enough water to provide thorough coverage or 1000 litres of water, With Nutrients: Add 2-4 litres per hectare mixed with the liquid nutrients. Add to a partially filled tank. Include with every application.	Reapply 2-6 times during the growing season.	_{It may be water run, side dressed, mixed with soil applied with liquid nutrients, or sprayed directly on the soil.}
Sprinkler or Drip Irrigation:	General:	Smaller amounts may be applied in every irrigation instead of only one application.		_{Not corrosive to pipes or nozzles and will not plug them.}
Transplanting or Cutting:	General	Mix 4 litres per 750 litres of solution.		_{Mix well before use.}
Agricultural Specific Recommendations:	Vegetables:	600ml per 100L water	Apply every 2 weeks or as required.
Orchards & Vineyards:	600ml per 100L water	Apply every 4 weeks or as required.
Ornamentals & Turf:	600ml per 100L water	Apply every 4 weeks or as required.
Pasture:	1-3L/ha in 60-100L water	Apply as required.
Broadacre Crops:	0.6-2L/ha in 60-100L water	Apply as required, depending on canopy closure.
Spot-Spraying:	35ml per 10L water	Apply as required.
Fertigation	Vegetables:	6 - 10L/ha	Apply every 2 weeks or as required.
Orchards, Vineyards, Ornamentals & Turf:	6 - 10L/ha	Apply every 4 weeks or as required.
General Plants	Indoor and Outdoor	2.0ml/	Every 3-4 weeks
Vegetables & Annuals:	2.5ml	Weekly
Established Lawns:	8.0ml	Every 2-4 weeks
New Lawns:	5.0ml	Weekly
New/transplanted Plants:	2.0ml	Weekly
Trees:	8.0ml	Every 4 weeks

Specific Use

Rate

Frequency

Notes

General:

Lawn and Garden:

100ml/100m2

Home Gardener:

General:

1ml per 1sqm
100ml per 100sqm

Apply fortnightly or as required.

Broadacre:

General:

6 - 10 Litres per hectare in enough water to provide thorough coverage or 1000 litres of water,

With Nutrients: Add 2-4 litres per hectare mixed with the liquid nutrients. Add to a partially filled tank. Include with every application.

Reapply 2-6 times during the growing season.

_{It may be water run, side dressed, mixed with soil applied with liquid nutrients, or sprayed directly on the soil.}

Sprinkler or Drip Irrigation:

General:

Smaller amounts may be applied in every irrigation instead of only one application.

_{Not corrosive to pipes or nozzles and will not plug them.}

Transplanting or Cutting:

General

Mix 4 litres per 750 litres of solution.

_{Mix well before use.}

Agricultural Specific Recommendations:

Vegetables:

600ml per 100L water

Apply every 2 weeks or as required.

Orchards & Vineyards:

600ml per 100L water

Apply every 4 weeks or as required.

Ornamentals & Turf:

600ml per 100L water

Apply every 4 weeks or as required.

Pasture:

1-3L/ha in 60-100L water

Apply as required.

Broadacre Crops:

0.6-2L/ha in 60-100L water

Apply as required, depending on canopy closure.

Spot-Spraying:

35ml per 10L water

Apply as required.

Fertigation

Vegetables:

6 - 10L/ha

Apply every 2 weeks or as required.

Orchards, Vineyards, Ornamentals & Turf:

6 - 10L/ha

Apply every 4 weeks or as required.

General Plants

Indoor and Outdoor

2.0ml/

Every 3-4 weeks

Vegetables & Annuals:

2.5ml

Weekly

Established Lawns:

8.0ml

Every 2-4 weeks

New Lawns:

5.0ml

Weekly

New/transplanted Plants:

2.0ml

Weekly

Trees:

8.0ml

Every 4 weeks

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Amount of Reviews:

Seaweed Secrets

By: Sean on 30 March 2020

Great value for money

Seaweed Secrets - Concentrated Liquid Seaweed (Kel

By: John on 30 June 2020

Best seaweed solution I've used - great value and super fast postage too.

Amazing value

By: Adrian on 14 October 2020

heaps cheaper than seasol and without tge added salt. Great product for lawn application.

Would recommend

By: James on 16 January 2021

Helped condition my soil to assist in health lawn growth

Top product

By: Blake on 26 March 2021

Awesome stuff

Very high quality seaweed

By: Jay Francis on 20 April 2021

The quality of this seaweed is very high compared to the ones bought in major hardware stores. My plants love it be them indoors or outdoors.

Great product

By: Alana on 13 May 2021

I use this on my indoor plants, they love it!

My lawn and plants loves it!

By: Shoua on 4 June 2021

My lawn/plants cannot do without this magic portion! Go with a fortnightly application for that extra TLC and your lawn/plants will be ever grateful to you - I mean that! The unique nutrients included in this product and for the price, I cannot ask for more from Plant Doctor! Seaweed Secret, QH and Stimulizer is an amazing mix that most lawn professionals use and I can absolutely relate and appreciate why they trust these products.

So much better than other seaweed products!

By: Jack on 30 June 2021

Was using Seasol and some other seaweed products but nothing beats this stuff!!! noticed a great change in just 12 hours after use! Insane!

By: john on 7 July 2021

Been using this for approx. 1 year now and seeing great results. More economical than other seaweed products.

Great Fertiliser!

By: Rachel on 11 July 2021

I love this product and so do my plants! Will keep buying this for sure!

Amazing product

By: Gurinder on 13 July 2021

Amazing product for a very competitive price.

Love this stuff

By: Alecia on 4 August 2021

This stuff is great! I mix it with Natures Soil Wetter and Activ8mate in a hose old hose on bottle, use it on both my lawn and garden. Both of which are thriving, I'm always getting compliments from people about how lovely it all looks. It's a must buy, the bundles are such great value too.

Excellent results

By: Clifford on 24 August 2021

Great products, organic, great value for money, this is my 2nd time buying this product.

By: Nelson on 2 September 2021

I have recently started using seaweed secrets on my couch lawn and outdoor plants. So far I have had great results. Very impressed and will be ordering again.

Better and cheaper than the other seaweed stuff

By: Nathan on 3 September 2021

At the price and concentration... I cant fault this stuff. Smells more potent than the other brand that we all know about. Works will in knapsack on the lawn and garden beds

By: Emma on 30 September 2021

This is such a great product! Great price and super concentrated. It's working wonders on my indoor plants and it's also organic! I love it.

Sea Weed Secrets

By: Greg on 30 September 2021

My grass and plants love this stuff. Great product and great price.

Revitalized

By: Alex on 15 October 2021

Threw this one down when I started having problems with my new Palmetto lawn, after 2-3 applications of this product the issues were no longer present, a good result from soil conditioning.

By: Matthew on 6 November 2021

I use on lawns every 2 weeks. Great stuff, noticeably better than hardware store brands.

Great Product and value for money!

By: Robert on 12 November 2021

I received my order within a couple of days of ordering. I used it for the first time one week post doing a lawn renovation. Within three to four days there were lots of new runners and great leaf colour. Fast forward two weeks and my lawn is looking great. Would highly recommend!

Happy Customer

By: Rowan on 22 November 2021

Such a great product and easy to apply through the Ezy Flo fertigator.

By: Nick on 23 December 2021

Excellent soil conditioner at a great price

Healthy lawn!

By: Aiden on 26 December 2021

Wonderful product have been using it for about 3 growing seasons now. 1000x better than the green shed products and cheaper. Regular applications has made my soil and plant lush and healthy.

Still the best seaweed product

By: Steve on 4 January 2022

The best seaweed product on the market and a great price.

By: Kyle on 11 February 2022

Highly recommend this product for liquid kelp. High quality product and best bang for buck when compared to competitors. Always find Plant doctor products are delivered quite quickly once ordered.

Amazing Green Zoysia

By: David on 23 March 2022

I use the Plant Doctor Seaweed Secrets on both my Empire and Augusta Zoysia in conjunction Natures Soil Wetter, Liquid Iron, Quantum, Stimulizer and Activ8Mate and they bring a depth of healthy colour to my lawn that I have not seen with any other combination of products that I've tried

Brilliant value for money!

By: Kelly on 30 April 2022

Perfect for that fortnightly boost to our Sir Walter Buffalo, greener, lush and great value for money. I use it in our Holman hose spray for a quick and effortless application.

5 star praise

By: dion on 27 September 2022

First time taking on a lawn reno and with help and guidance from the plant doctor my lawn is looking amazing. This stuff is so easy to use with simple application instructions right there on the bottle you will get results in no time at the fraction of the price

Brilliant all round Product

By: Lisa on 4 November 2022

The go to Product for all my gardening needs. My Alocasias can’t get enough of this product…. My veggies love it too, aswell as my collectible plants….. and it doesn’t burn sensitive leaves like others on the market!

Great Product

By: Joel on 1 January 2023

Excellent results on my Kik in SEQ, very quick postage and great communication, highly recommend

Should Have Changed Ages Ago

By: Leigh on 1 January 2023

Seaweed secrets is an amazing product. After only two sprays over a 10 day period my santa ana lawn is looking the best it ever has...I kid you not! I have persevered with other highly recommended products and thought they were good...but this stuff is the Best!!! Do yourself a favour and get to the Doctor now!!!

It’s a must for me

By: Dario on 9 January 2023

I cant have enough of it. My potted plants look healthier and stronger now

Best

By: Samuel on 10 January 2023

Best seaweed product on the market to date

Yet again another prompt delivery

By: Salvatore on 26 March 2023

Yet again another prompt delivery for my Seaweed Secrets for the year. Already just applied it as Autumn hits and can't wait to have this product get me through winter again to spring. Great value for money also when you get the 20lt drum

By: Michelle on 30 March 2023

I’ve been using this product for over a year on my lawn, garden and potted plants on a fortnightly/monthly basis and any plants I transplant or Re-pot to stop transplant shock. The natural sandy soil in my garden and lawn is getting darker and water holding ability improving. The CEC is also improving and fertiliser lasting longer. I am an independent agronomist and highly recommend this product.

Best Seaweed in Town

By: Mary on 14 April 2023

My plants are always happy since I have given regular seaweeds secret. I am keeping this as my secret. I bought 20L because I am anxious about running out.

By: Joshua on 17 April 2023

Recently purchased this along with a few other products. In the few weeks I have been using it my lawn has noticeably looked healthier. The fact that you use a lot less than other products for better results shows the great value. Very happy with it

Seaweed secrets

By: Joshua on 15 November 2023

Excellent product definitely recommend to anyone looking for a great seaweed product

Loving this product

By: Kain on 1 January 2024

I have only done one application of this product so far and I am already impressed with the results, a bonus is that this product does not leave a seaweed smell

By: Julius on 4 April 2025

This seaweed secrets product does work wonderfully well for all plants and lawns you only need to use what the instructions say and it keeps your plants and gardens safe and healthy from disease and pests just what the good doctor ordered.Thank you Plant Doctor

Great value

By: Jason on 25 June 2025

Lazy-proof

By: Danielle on 20 July 2025

The dosing bottle makes this so easy to use that I find myself remembering to use it more often. Herbs, vegetables, fruit trees, flowers, root bound seedlings that I optimistically started when I don't have room to plant them out - everything gets a dose of this with activ8 and loves it.

The Best Seaweed Product On The Market

By: Kevin on 12 November 2025

As my title says, This is by far the best seaweed product on the market, Been Using it for over a year now and have been extreamly happy with it!

Good seaweed product

By: Haden on 23 November 2025

Good seaweed products very good value as well

Great Stress Relief

By: Matt on 14 December 2025

Have been using kelp products for a while and this in combo with Soil Wetter provides some great stress relief in the summer heat

Has made a huge difference to the lawn in such a s

By: Craig on 9 January 2026

WOW! The lawn really greened up in a short time from this. Simply amazing.

The best

By: Luke on 29 January 2026

Really happy with this seaweed solution. Have used it for spring and summer and my lawn and garden hasn't looked better. I've used so many of the other brands but will be sticking with plant dr now. Purchasing the 10L is great value.

Customer Reviews

First time owning lawn. Gave the team at plant doctor a ring and they supplied me with a wealth of information. Products turned up quickly.

Billy Green

Will definitely be getting more 8 weeks difference been using stimulizer, activ8mate, soil wetter, seaweed secrets and champion fertiliser. Was super fast delivery.

Michael Preddy

Only have great things to say about Plant Doctor. Organic products and a competitive price, fast shipping and easy to contact with questions. Have had great results with the special mix for lawns, and my plants (indoor and outdoor) love the seaweed secrets. I am excited to test out some of the animal products soon!

Seaweed Secrets - 1L

Use much less per square metre than major brands

Notify me when back in stock

Description

Premium Liquid Seaweed Soil Conditioner with Kelp, Humic & Fulvic Acid

If you're looking for a natural way to grow stronger, more resilient plants and improve your soil in the process, Seaweed Secrets is your go-to. From home gardeners to commercial growers, it's the eco-friendly edge your lawn, garden or farm deserves.

Features

Benefits of using Seaweed Secrets on your lawn and garden:

Nutrient-Rich Formula

Improved Soil Health

Enhanced Plant Growth

Stress Tolerance

Increased Nutrient Absorption

Disease & Pest Resistance

Environmental Sustainability

Safe for Humans and Pets

Specifications

How it Works

Application

Need Help with Application Rates?

Safety

Safety Guidelines

FAQ

How soon after spraying Seaweed Secrets can I mow?

Should I mow my lawn before or after application?

How often should I apply this product?

How much of this product should I apply?

Which method of application is better for Seaweed Secrets: Hortex sprayer or backpack sprayer?

Can I use Seaweed Secrets on all lawn types?

What does Seaweed Secrets do for my lawn or garden?

Can I use Seaweed Secrets in summer?

Is Seaweed Secrets organic?

Can I combine Seaweed Secrets with other fertilisers?

Is Seaweed Secrets safe for pets and kids?