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 - Liquid Organic Soil Conditioner with Kelp & Fulvic Acid

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

Lawn Lovers Pro Pack bundle

5-Step Lawn Care System Complete Lawn Health & Colour Fixes Tired, Patchy Lawns

Lawns Gardens Farms

From $86.18

10% OFF WAS $95.75

Just been laid - turf starter bundle

New Lawn Establishment System Stronger Roots from Day One Fixes Transplant Shock & Weak Establishment

Lawns Gardens Farms

From $66.42

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Pro Soil Enhancer bundle

Complete Soil Regeneration System Rebuilds Soil Health & Nutrient Availability Fixes Compacted, Depleted Soil

Lawns Gardens Farms

From $52.07

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Complete Soil Enhancement System Unlocks Nutrients & Soil Performance Fixes Depleted, Compact Soil

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Amount of Reviews:

amazing results

By: Thomas on 28 May 2017

I have been using Seaweed Secrets for a few years and each year the results have been spectacular with the health of my soil + plants improving marvelously, highly recommended.

Great value

By: Grant on 29 September 2018

Been using for a couple of months now and has helped my lawn a lot

Brilliant stuff

By: Ashley on 11 October 2018

The vege garden has never looked so good. Great value for money too

Great soil health

By: Shaun on 19 October 2018

This has been great to improve a fairly average soil profile.

Value for money

By: Michael on 19 October 2018

Was using another brand bbn product for a soil conditioner, started using seaweed secrets have cut the cost down dramatically, than being able to control that money into other products to mix with it great for lawns and gardens

EXCELLENT PRODUCT

By: Stephen on 21 October 2018

Fantastic easy to use product and it doesn’t smell. I use it on my lawns and gardens regularly. I love plantdoctor products!!

Much Better than Seasol

By: Adam on 23 October 2018

Compared to Seasol this product is odorless, more concentrated, of a better quality and just generally more awesome. Applied sunday evening.. by monday morning my lawn was looking noticeably better.

Best seaweed product

By: Ken on 23 October 2018

The ultimate seaweed product. Great results in days. Easy to mix and apply, No lumps or nasty smells.

Seaweed Secrets

By: Joel on 23 October 2018

Stoked with this product, will be using for years to come. Big improvements already only after a few months of use!

Highly recommended.

By: Milan on 23 October 2018

Seaweed Secrets has made a massive difference in my lawn, I apply fortnightly and have started seeing positive results after only 2 applications. Highly recommended.

Better than seasol

By: Isaac on 27 October 2018

Humic and fulvic makes it more versatile than seasol. Great for transplanting

The best

By: Mathew on 4 November 2018

The best Seaweed product on the market. easy to mix up, I spray with a knapsack and the results are amazing.

Best Seaweed product around

By: Trent on 5 November 2018

I use this on everything from lawn, plants (natives too), veggies and citrus. Hands down an amazing product. I apply every 2-4 weeks and it’s helped our soil profile and lawn + plants have really progressed.

Liquid gold

By: dimitrios on 8 November 2018

I use this partnered with activ8mate and stimulizer on my lawn this stuff is the ants pants instant results in just days

Mothers Milk

By: Daniel on 11 November 2018

I’m glad I’ve discovered Seaweed secrets. The overall health of my lawn after using this paired with the soil wetter is amazing. I love it.

By: Kom on 19 November 2018

Concentrated stuff so you use less than other seaweed products on the market. Amazing for my new turf, applied weekly and definitely helped it survive being laid in middle of winter.

Awesome product

By: Daryn on 20 November 2018

One of the best value for money products I've purchased for my lawn. Used it with the soil wetter and activ8mate products and made a massive difference.

Wow what a result

By: Corey on 28 November 2018

Where do i start, great product with amazing results and at such great value. Thankyou

Building a better "Mouse Trap"

By: Tony on 30 November 2018

It is well known of the benefits of kelp in plant and lawn care, couple that with Humic and Fulvic Acid and you have a supercharged formula that provides outstanding results. Application rates and frequency are not excessive showing the potency of the product.

Seaweed not so secret?

By: Richard on 1 December 2018

Seaweed is a great organic potassium source along with other minerals and such. This product however is very potent and easy to use and mix with Plant doctors other liquids. I apply every 1 to 2 weeks as the more you apply the better the soil becomes conditioned and strengthens turf grass and plants. Buy the larger size than you think you need as you will use this stuff all the time!

Great Economical Product

By: Emma on 13 December 2018

Fantastic superior replacement to common similar market alternatives. Great results

Fantastic

By: Lia on 23 December 2018

Perfect all rounder. Use it for both turf and plants. Bigger bottles make life easier and fast delivery

Awesome Product and great results

By: Justin on 24 December 2018

As the title says, this is an awesome product and I have got great results. Since applying this my lawn has taken off. Will def be getting more and making this a staple of my maintenance routine!

Superb formulation

By: Michael on 2 January 2019

Was using Seasol and getting ok results. Once I switched to seaweed secrets it was like chalk and cheese. The lawn seemed to thicken and grown as I was spraying it on. After using this for a few application my kids and dog cant pull the grass blades out as easily and bare areas seem to miraculously fill in. Amazing stuff. Will be putting this down every 2 weeks all year round.

Why use anything else?

By: Martin on 10 January 2019

Loved switching to Plant Doctor range of products, with Seaweed secrets being such a great all round versatile product. Much more economical than other 'brands' but with better results. Both the lawn and plants love it. All seem to hold up so much better through changing weather, and overall health has been fantastic.

Don’t buy anything else!!

By: Joshua on 17 January 2019

I’ve been using Seaweed Secrets for the past 8 weeks and have noticed a considerable improvement in the growth and health of my lawn. Combined with Natures Soil Wetter and Activ8mate on the lawn it’s a winning combo at very affordable rates - considerably less than even the cheapest products from your local Big Green shed. Do yourself a favour and buy the big drum, you’ll want to use it on everything.

Cheaper than anything else on the market, better t

By: Jake on 30 January 2019

Used Seasol for a few weeks since laying my new turf. Thought I was getting good results with it then, until I started using PD Seaweed Secrets. Using this in conjunction with other PD products I think my turf is becoming incredibly hardy to heat stress and generally looks much healthier. Used this coupled with PD soil wetter & PD fert on a few patches that I killed to straw when I was trying to eliminate Paspalum with a weed killer. That was 3-4 weeks ago. Everything is back to normal now......... already! (sizeable patches too, around 7 square metres). I'm sure there is all sorts of goodies going on in the soil, but that's way over my head. Turf looks brilliant and its cheaper & better than any other product, need I say more!?

Fantastic results

By: Dylan on 7 February 2019

Switched to this product after using seasol for a while and the improvements have been outstanding so far! Definitely a good buy and will see improvements quickly!

Plant Stress. Challenge accepted!!!

By: Leo on 19 February 2019

This baby is a miracle for plant stress. Been using Seaweed Secrets for a year and my viburnum plants have thrived in awful conditions with clay/alkaline soils. They were stunted in growing and heavily stressed with major leaf dropping. Very stringy. Once i started following the instructions, my plants had started to become healthy and thicken up with growth. SS saved my babies.

You cant beat plant doctor products

By: Dafydd on 23 February 2019

Cheaper and better than the compition, what more do you want? You have to buy this, so easy to use and takes effect straight away

Excellent

By: Marckus on 9 March 2019

Couldn't be happier with this product. I'm so glad I found PD. Excellent value for money specially when buying the bundle

Amazing Results

By: Michael on 10 March 2019

Wow the difference this has made to my lawn is amazing im am so happy with the results. Plus its also great value for money when you compare it to other products.

By: Tyron on 13 March 2019

It’s only been a few weeks and the results are in. And it’s fantastic. Great value and I had next day delivery

Leaves seasol in the dust

By: Jennifer on 19 March 2019

I use to use seasol and will never go back. Seaweed secrets is much more potent than seasol so you use less of it. Fantastic value and has taken our lawn to the next level

The bees knees

By: Jonathan on 21 March 2019

Really impressed. Better results than major branded competition, need less of it, the 1L came in an easy to measure bottle and as far as value for money, smashes all of the competition. Extremely impressed!

Awesome stuff

By: Matthew on 23 March 2019

This stuff is awesome, really noticed the difference to lawn health since I started applying it. Highly recommended!

What's Seasol??!!!

By: Paul on 27 March 2019

Amazing results is all I can say. Compared to Seasol this product is head and shoulders better for results and value for money!!!

My Neighbors are Jealous

By: Kevin on 7 April 2019

I have just started using Plant Doctor products and the results are fantastic.

Best on the market

By: Shayne on 11 April 2019

This is my favourite product. I naturally have poor quality soil and by using a small amount of this every week, my lawn health has improved out of sight.

Great first product

By: Jason on 18 April 2019

I started off with seasol from Bunnings which was ok, then found the lawntips YouTube page which point to plant doctor and my lawn has never looked better. Seaweed secrets is the next step up to a better lawn.

By: Rebecca on 25 April 2019

Much better value than Seasol. Great for improving our poor quality soil. Highly recommended.

who needs Seasol?

By: Sean on 30 April 2019

100 times better than seasol, no stick , full of goodies and superb for mixing into a nice hot mix for the sprayer back. SS,ACTIVE8, stimulizer and your lawn will continue to thrive. excellent product!

Superior product

By: Jacob on 18 May 2019

I've tried other seaweed based solutions before and initially they all seemed to do the same job. Then I tried seaweed secrets and noticed how much better the results were in a smaller timeframe. Seaweed secrets is a superior alternative to the stuff available at your big box stores. Hands down.

By: Shannon on 3 June 2019

So much better value then anything from the green shed.

Impressed

By: Teena on 4 June 2019

Love seaweed secrets over seasol impressed with the results

Feed the microbes

By: phillip on 18 June 2019

A great product to feed the microbes in the soil and improve soil health ..a very economical product

great stuff

By: Aaron on 25 June 2019

great product and a must have for your lawn.

Seaweed Secrets - Special

By: Peter on 2 July 2019

Wow does this product make your grass POP, great for soil condition to support your lawn longer.

great product

By: scott on 31 July 2019

so much better then seasol alot cheaper overall aswell

Sorry Bunnings

By: robert on 2 August 2019

Such good value!! Sorry Bunnings, I’m not buying Seasol ever again.

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

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?