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 - 5L

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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29 January 2026

The best

Luke

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.

9 January 2026

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

Craig

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

14 December 2025

Great Stress Relief

Matt

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

23 November 2025

Good seaweed product

Haden

Good seaweed products very good value as well

12 November 2025

The Best Seaweed Product On The Market

Kevin

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!

20 July 2025

Lazy-proof

Danielle

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.

25 June 2025

Great value

Jason

4 April 2025

Seaweed secrets

Julius

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

9 March 2025

Not fit for purpose

David

It doesn't matter how good the product is, the container it comes in is unusable. I ended up using a drill and transferred half the product into an old Bunnings Seasol container. At least I can get the product out of the Seasol container. I am sick of the dumb stuff and this item is not fit for purpose. Just Rubbish! And the fact that the other reviewers don't mention this is highly suspicious

18 January 2025

Super Happy

Been super happy with this purchase, applyed this with the Plant Doctor soil wetter as well and my lawn is thriving!

21 November 2024

Another high quality product

Tom

I brought this to give my lawn a kick start during spring. It's a great product that's easy to apply and mixes well with the other products in the plant doctor range.

13 November 2024

Awesome product

jade

Been using the seaweed secrets for 12 months now and have just placed a 2nd order and my lawn has never looked better. Keep up the great work guys!

10 November 2024

Bryce

Really love the product, lawn is looking really good and showing signs of improved health in troubled areas!! Would absolutely recommend.

21 October 2024

Lawn & Vege Garden seem to be loving it!

Jeremy

Been using this now for a few months on the lawn and vege garden and everything is growing healthy and looking great!

2 July 2024

Better than seasol

Lucas

Has more beneficial ingredients and is more affordable compared to seasol!

29 June 2024

Seaweed Secrets

Bruce

I have used this product in combination with 5 other Plant Doctor products for the past four years and my Sir Walter lawns are pretty spectacular. The service and delivery are both prompt and efficient.

18 June 2024

Great Kelp solution

Adam

I use this on both my garden and lawn. Great value for money

12 March 2024

Outstanding service and fast shipping for an even

First time using Plant Dr’s Seaweed Secrets and couldn’t be happier with the results. I’ll be back for more!!

17 February 2024

Great products

I have been using seaweed secrets as part of a mix for 12 months and the results are fantastic. Nice healthy lawn with great root depth.

6 February 2024

LUSH AND GREEN

Tanya

Love this product, made my new lawn from light green to a bright vibrant green in only two applications! Highly recommend. Purchased as part of the Lawn Lovers Pro Pack.

29 January 2024

Great product and value

Brett

I purchased the 10L product as it represents great value. Now after using the product for a month on my turf, indoor and outdoor plants I am super impressed by the results. I combined with Quantum H and Stimulizer. Will 100% be buying more and recommending Plant Doctor to my friends and family.

25 January 2024

Jordan

This really is one of the best products out there

21 January 2024

Great product! Good results

Aiden

Very happy

9 January 2024

Andrew

Unbelievable results. Noticeable change with a few days. After using this product for a few years now on multiple lawn types this is far superior to others on the market

1 January 2024

Loving this product

Kain

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

23 November 2023

This stuff works!

Steve

I bought a 5L not long ago and now back for the 10L. Returning customers could only mean one thing. Good products

15 November 2023

Joshua

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

11 November 2023

Jack

Great product

28 October 2023

Chris

Very happy with my seaweed secrets purchase from Plant Doctor.

25 October 2023

Top Quality

Justin

I've been using Plant Doctor liquid fertilizers for some time now, and I can't fault them. They are of a high quality, and make my lawn look exceptional. Seaweed secrets is a must for both lawns and gardens.

14 October 2023

A little goes so a long way

Anthony

Great product, low odor compared to other similar products and a small amount goes so far.

13 October 2023

Sharon

This is an amazing base for ALL my fertilising. I use it on everything. It really if fantastic

8 September 2023

Seaweed No Secret

Timothy

Been using Seaweed Secrets for a while now. Helps the lawn recover when it's in stress. Seasol is ok, but when you do the maths, Seaweed Secrets is way better value for money, covering more m2, plus it has all that extra organic goodness included.

31 August 2023

Excellent Product

Bradley

Far better results than the brands you get at Bunnings

27 August 2023

Using the seaweed secrets combined with Activ8mate makes a big difference

3 August 2023

better than the green shed

you can buy a similar product from your local hardware store... but for value and quality of product you can't beat Seaweed Secrets!

25 May 2023

Amazing

Amazing product, have seen amazing results after the first application.

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

14 April 2023

Best Seaweed in Town

Mary

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.

30 March 2023

Michelle

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.

26 March 2023

Yet again another prompt delivery

Salvatore

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

11 March 2023

Great stuff

Philip

Like seasol but better the fact it takes less than 200mL to do my 180M2 of turf is awesome and keeps great colour and condition to my lawn keeps it lush and healthy looking. Once it runs out I'll definitely be buying more love the stuff

16 February 2023

Great Product!

Patrick

I use Seaweed secrets in my EzFlo Fertigation system and my turf responds really well. Will keep on using year round! Highly recommend!

10 January 2023

Best

Samuel

Best seaweed product on the market to date

9 January 2023

It’s a must for me

Dario

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

1 January 2023

Should Have Changed Ages Ago

Leigh

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!!!

Great Product

Joel

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

4 November 2022

Brilliant all round Product

Lisa

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!

27 September 2022

5 star praise

dion

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

30 April 2022

Brilliant value for money!

Kelly

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.

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 - 5L

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

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?

Reviews

The best

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

Great Stress Relief

Good seaweed product

The Best Seaweed Product On The Market

Lazy-proof

Great value

Seaweed secrets

Not fit for purpose

Super Happy

Another high quality product

Awesome product

Seaweed secrets

Lawn & Vege Garden seem to be loving it!

Better than seasol

Seaweed Secrets

Great Kelp solution

Outstanding service and fast shipping for an even

Great products

LUSH AND GREEN

Great product and value

Awesome product

Great product! Good results

Seaweed Secrets

Loving this product

This stuff works!

Seaweed secrets

Seaweed secrets

Very happy

Top Quality

A little goes so a long way

Seaweed Secrets

Seaweed No Secret

Excellent Product

Great product

better than the green shed

Amazing

Great product

Best Seaweed in Town

Seaweed Secrets

Yet again another prompt delivery

Great stuff

Great Product!

Best

It’s a must for me

Should Have Changed Ages Ago