Name: Seaweed Secrets
Brand: Plant Doctor
Price: 14.95 AUD

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.

Simple to Use. Powerful Results.

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

Where to use Seaweed Secrets:

Lawns (Buffalo, Couch, Kikuyu & More)

Strengthens root systems and promotes lush green colour
Improves drought resistance and soil moisture retention
Boosts recovery after mowing or heavy traffic
Safe for use year-round as part of your lawn care routine

Gardens (Veggies, Flowers, Trees, Pots)

Encourages better flowering, fruiting, and root growth
Helps plants recover from stress (heat, cold, wind, transplant shock)
Improves soil aeration and nutrient uptake
Suitable for raised beds, garden beds, pots and indoor plants

Farms & Larger Properties

Promotes microbial activity and reduces nutrient “lock-up”
Improves soil tilth and long-term fertility
Compatible with most spray or fertigation systems
Supports regenerative and organic farming practices

Using Seaweed Secrets provides numerous benefits for your garden and lawn:

Benefit	Description
Nutrient-Rich Formula	Seaweed, specifically Ascophyllum nodosum, is packed with 77 minerals, 17 amino acids, complex sugars, and chelating agents. Combined with high-quality Humic and Fulvic Acid, this nutrient-rich solution boosts soil health, helping plants thrive. Kelp is a vital soil enrichment product that promotes healthy plant development, making it ideal for lawns, trees, and garden plants.
Improved Soil Health	Seaweed improves soil structure and fertility by enhancing moisture retention, aeration, and drainage. This leads to healthier root systems and better nutrient uptake, fostering stronger plants.
Enhanced Plant Growth	The growth-promoting hormones in liquid seaweed stimulate plant growth, resulting in increased leaf and stem growth, improved flowering and fruiting, and overall plant vigour. It helps boost plant development, making it an essential addition to any garden or lawn care program.
Stress Tolerance	Seaweed extracts contain natural compounds that help plants endure environmental stresses, including drought, heat, cold, and disease. These compounds boost plant resilience, helping them recover from adverse conditions and thrive.
Increased Nutrient Absorption	Seaweed's organic compounds act as chelating agents, improving the availability and absorption of nutrients, ensuring your plants get the maximum benefit from the soil. This leads to more productive and healthier plants.
Disease & Pest Resistance	Seaweed extracts enhance the plant’s natural defences, making them more resistant to diseases and pests. It helps reduce the need for chemical pesticides and fungicides, promoting a more eco-friendly approach to plant care.
Environmental Sustainability	Liquid seaweed is a sustainable, eco-friendly fertiliser derived from renewable marine resources. It does not contribute to water pollution and helps maintain beneficial soil organisms, making it a safe and responsible choice for your lawn and garden.
Safe for Humans and Pets	Seaweed extracts are non-toxic and safe to use around humans and pets. There is no need for protective clothing or equipment when applying, making it a user-friendly solution for your garden care needs.

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.

The Science Behind Seaweed Secrets

Seaweed Secrets is based on the synergistic action of cold-processed kelp extract, humic acid, and fulvic acid, acting as natural biostimulants and nutrient chelators. It works by:

Stimulating root zone microbes to convert bound nutrients into plant-available forms
Improving Cation Exchange Capacity (CEC) in the soil, aiding nutrient retention
Enhancing stress tolerance through cytokinin and auxin compounds naturally found in seaweed
Supporting nutrient absorption across a wide pH range
Strengthening plants’ natural defence mechanisms, reducing reliance on synthetic pesticides

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

Product Summary:	Details
Form	Liquid Concentrate
Use Cases	Lawns, gardens, trees, farms
Application	Watering can, hose-on, foliar spray
Compatibility	Do not use with iron-based products
Origin	Made in Australia

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.

Safety Guidelines

Keep out of reach of children. May be harmful if swallowed. If eaten seek medical help. ALWAYS TRIAL BEFORE CHANGE. Before a new rate, product or application method is used, a small trial is recommended. Warranty of this material, either expressed or implied, is limited to a guarantee of the composition as shown on this label in as much as uses are beyond the seller’s control. For the same reason, the seller is not liable for any injury to any living thing, crops, soils, or materials which may result from the use or storage of this material. As this is largely a mineral-based fertiliser made from natural resources, the analysis may change slightly.

NOTE: not compatible with iron-based products

Description

Frequency

General Plants (indoor & out): 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

APPLICATION RATES

Shake well before use.

Application Type

Rate & Application

HOME GARDENER

1ml per 1sqm
100ml per 100sqm
Apply fortnightly or as required.

BROADACRE

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

With Nutrients:

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

SPRINKLER OR DRIP IRRIGATION

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

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.

APPLICATION RATE

General Plants (indoor & out): 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

Note: Can be applied to the soil or foliar, if applying to foliage, check for staining prior, if concerned

Others Also Bought

Amount of Reviews: 59

Another high quality product

By: Brad on 21 November 2024

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.

Awesome product

By: jade on 13 November 2024

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!

Seaweed secrets

By: Bryce on 10 November 2024

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

Outstanding service and fast shipping for an even

By: jade on 12 March 2024

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

LUSH AND GREEN

By: Tanya on 6 February 2024

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.

Great product! Good results

By: Aiden on 21 January 2024

Very happy

better than the green shed

By: David on 3 August 2023

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

Amazing

By: Adam on 25 May 2023

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

Great stuff

By: Philip on 11 March 2023

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

Food for the soil

By: Dario on 29 March 2022

Everything is thriving in the garden, always use when transplanting and after that every 3 weeks or so. It’s a perfect tool to complement a healthy organic garden.

Great value!!

By: Vincent on 20 January 2022

This stuff works out way cheaper per 100m2 compared to the stuff you can get from the green shed. Works a treat. Lawn has never looked better. Free shipping with orders over $59 is the icing on the cake.

A++ kelp liquid for your lawn n plant

By: Anferny on 31 March 2021

Loving this product and already on my third bottle because you can use on everything in seed, garden, lawn and fruit. Just a fantastic product and not very expensive.

Simply the best !

By: Tim on 12 March 2021

I started using seaweed products over 10 years ago and like most started with Seasol, but soon learnt that there was better products out there. I then progressed to Natrakelp which I instantly noticed the difference. Trying Seaweed Secrets has moved things up another level again. I believe Seaweed Secrets is the best value product on the market with much better additives than the competition.

Fantastic

By: Warren on 5 March 2021

One of the many fantastic Plant Doctors products I use fortnightly throughout the growing season. Soil health has improved greatly.

Secret Sauce is Right!

By: Chris on 3 March 2021

High quality, natural seaweed product that blows the big name out of the water.

Great product

By: Mason on 26 February 2021

I bought a bulk order of the ben sims pack which included this product and a variety of others. I Have been very satisfied this season with the results. Grass has handled the temperatures well with the assistance to plant doctors foliar products. The turf looks great and loves the applications. At a competitive price, i highly recommend.

By: David on 20 February 2021

After using other products for a while know I have noticed the difference in just a few short weeks of using this product. Maybe it's a secret ingredient?

plant doctor is the real deal

By: Steve on 28 January 2021

seaweed secrets is a great product easy to apply and not harmful in anyway.

Seaweed booster

By: Anthony on 21 January 2021

I have used this product now for a month so 2 applications and the grass has never looked so healthy in all its years. Results were noticeable within the week. Great product.

SS - Great value for money

By: Salvatore on 14 January 2021

SS - Have now bought this in bulk 20lt drum, as I use it so much. Use it on the lawn and plants too. Consistent application makes a difference. And great value for money

Yes! Just yes!

By: Mike on 9 January 2021

This stuff is the real deal. Super concentrated and super effective! For yourself a favour, stop buying lessor quality seaweed products and get onto this stuff!

Sensational mix

By: Tyler on 4 January 2021

I purchased the Ben Sims Lawn Tips pack for my instant turf couch and all of the products have been sensational. The improvement in my couch at a former residence, in which I did not use these products, and the couch at our new place, in which I use these products, is 10 fold. Very happy.

Bulk is the way to go

By: Nathan on 23 December 2020

Moving over from Seasol this product will allow me to apply more often and still save $$$ the 20ltr Works out so much better than my regular Seasol and with added Humic & Fulvic its a clear winner.

So worth it for the price!

By: Nathan on 9 December 2020

After trying other seaweed products over the years, I bit the bullet and tried this product , and actually saw the difference! I will never go back! Thanks plant doctor!

Highly recommend

By: Alexander on 4 December 2020

Recently bought this product for the second time. Definitely won't be the last time! Great stuff.

No 1 product in seaweed concentrated

By: Anferny on 1 December 2020

This product definitely beat the seasol product I have used for a long time so for people want beautiful lawn is a must product. Super fast delivery order it on Sunday morning and received it on Tuesday couldn’t be happier.

Great health tonic for plants

By: Benjamin on 27 November 2020

I use this throughout my garden and apply extra bits on parts of the lawn that need that extra love. I find that some pots that don't have a lot of soil and require frequent watering seem to get stressed more than others (probably from flushing nutrients away) and giving some of this in the watering mix greatly helps them.

BETTER THAN SEASOL

By: Bruno on 25 November 2020

I COULDN'T RECOMMEND THIS PRODUCT ENOUGH, MUCH BETTER THAN SEASOL AND BETTER VALUE FOR MONEY IF ORDERED IN BUNDLE WITH OTHER PRODUCTS

Outstanding

By: Scott on 15 November 2020

I have been using seaweed secrets on my lawn since my reno in September. I cannot recommend this product enough - it has definitely helped improve the health of my lawn.

Value For Money and a Great Product

By: Chris on 12 November 2020

Compared to the stuff you buy from Bunnings, I have noticed a huge improvement in grass roots and soil quality and It goes so much further than the alternative. Buying it for the third time it's great!

Best Concentrated Liquid Seaweed

By: Sunny on 9 November 2020

I used to use Bunnings stuff but once I started watching Ben Sim's show and I have used this stuff and its the best product.

Awesome for everything!

By: Simon on 2 November 2020

Gardens, lawns, this stuff gives the boost needed!

Happy with service

By: Matthew on 29 October 2020

Happy with ease of ordering and speed of delivery. Product only just applied but looks good already.

Love Seaweed Secrets

By: Benjamin on 26 October 2020

This is great stuff, use it on my lawn and all plants. Really good results.

Great all-rounder

By: Steve on 23 October 2020

Seaweed Secrets is a great product. The added humic and fulvic acids make this a better option than other common seaweed solutions (seasol). It is also less viscous and won't clog your sprayer. Can also be mixed with other liquids, such as fertiliser and wetting agents.

Quality Value

By: Blake on 6 October 2020

Great quality product at a great price vs more well known alternatives. Great product to feed your soil Lawn & Gardens.

seaweed secrets

By: wayne on 2 October 2020

Environmental, kid and animal friendly product. Great value for money easy to use. Why buy elsewhere. Been using this product for two years and the gardens and lawns looking awesome

Sensational Seaweed

By: Geoff on 1 October 2020

I have been using Seaweed Secrets on my lawn for over a year now. It is lush, healthy and really green. I started using on the gardens about 6 months ago and the results are outstanding, the plants look glossy and healthy. I am so pleased with this product that it is an important part of my routine for lawn and garden care. A quality product.

By: Adam on 23 September 2020

I use this on my lawns, garden beds and veg beds, great seaweed product at a fantastic price.

Used Regularly

By: Vijayant on 19 September 2020

I use this product regularly on my lawn and plants. Helps them cope through extreme cold and warm months. Usually mix with soil wetter and Activ8mate liquid fertiliser.

Good Product

By: Neeraj on 4 September 2020

Got it as part of Ben Sims Package. Delivery was prompt. I have been using Seasol so far, but product seems a better replacement.

By: Matthew on 22 August 2020

Everything I was looking for at an economical price

Good stuff!

By: AC on 9 August 2020

Everything you’d hope to get in a seaweed solution

Versatile organic tonic

By: Jerome on 27 July 2020

I won't lie, this stuff stinks!! But there's plenty of goodness in there and I've seen far greater results from this that other Seaweed products available at chain stores. I've used it as a foliar spray and also mixed in a watering can, both which result in great plant growth. Particularly useful on veggie gardens.

Great replacement for seasol

By: Gary on 26 July 2020

A much more economical way to add seaweed product to your lawn. Works great!

Highly recommended

By: Michael on 22 July 2020

I wouldnt go anywhere else - stop searching for alternatives. Ordered my product and had them delivered within 48 hours (for free!!) Very helpful team and support to finding the right solution for my needs. Great experience as well as value for money and can’t wait to see the results of the products. I did a lot of research and came to the conclusion that PD products are the way to go. Plus supporting a local business make it the purchase even better. Thanks guys!

No odour. Great formulation!

By: Ken on 9 July 2020

There are many seaweed products I have tried and this guys really did an amazing mix with their formula, my plants are loving it & I am loving the odorless mixture in my hydroponic system. Great stuff!! This product will go well with their fulvic acid for foliage;

Seaweed Secrets

By: Michael on 2 July 2020

Absolutely love this stuff, I use it on the lawn & plants and noticing the condition of them already improving. Certainly helps with the resistance to temperature changes. Will definitely be getting more of this stuff.

So much better than Seasol

By: Kassem on 24 June 2020

Ive been using this product in combination with some other PD products and ran a small experiment on my hedge. On one part of the hedge i used this and other PD products, on the other part of the hedge i used slow release fertiliser and some seasol. The difference is amazing. I wish i could have posted photos here to show how vibrant and full the hedge is using the PD products as opposed to normal fert and seasol. Such an astounding difference.

By: Stephen on 24 June 2020

Fantastic product at a reasonable price.

Excellent

By: Aaron on 21 June 2020

Seaweed secrets is a cut above the rest. After seeding a couch lawn in late summer I can say this stuff is the reason for its strong establishment hands down. Have been applying 2-3 weekly with quantum H and the lawn is still going strong in winter!

Healthier Looking Lawn

By: Craig on 15 June 2020

Amazed with the results of this Product. Have been hearing a lot of hype around it and I must say its justified.

By: Christopher on 9 June 2020

Seaweed secrets is a fantastic product at a reasonable price. Filled with all the essentials to maintain a healthy lawn you'll do well to find a better alternative.

Good product

By: Anthony on 16 May 2020

I’m very happy with this product, I used this with the humid acid liquid on my lawn and have had good strong growth, I will use and purchase it again,

Great!

By: Brad on 8 May 2020

Awesome product and cheaper than competitors!

Helped my struggling lawn

By: Gene on 6 May 2020

I've used other seaweed products in the past but when i used seaweed secrets my lawn improved like even before. Top quality!!!! 5 stars

The goods !

By: Jacob on 2 May 2020

Honestly best seaweed product I’ve used

The Only Liquid Seaweed to Use

By: Kristian on 23 April 2020

I have been using Seaweed Secrets for two years now and all i have to say is that i love the product. I use it on all my lawns and gardens at home and for all my clients and have achieve great results. It defiantly has helped my Kikuyu and plants stay healthy with the frosts we get during Winter. Highly recommend and the only liquid Seaweed you should be using.

By: Alec Burich on 31 March 2020

I purchased seaweed secrets along with Ben Sims mix What a performer this product is first time I’ve seen my lawn this good and quick Grass is growing right up to my brick wall, never done that before

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!

Application Type	Rate & Application
HOME GARDENER	1ml per 1sqm 100ml per 100sqm Apply fortnightly or as required.
BROADACRE	6 - 10 Litres per hectare in enough water to provide thorough coverage or 1000 litres of water, reapplying 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. With Nutrients: Add 2-4 litres per hectare mixed with the liquid nutrients. Add to a partially filled tank. Include with every application.
SPRINKLER OR DRIP IRRIGATION	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	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.
APPLICATION RATE	General Plants (indoor & out): 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

Seaweed Secrets - 5L

Use much less per square metre than major brands

Notify me when back in stock

Product Description

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

Simple to Use. Powerful Results.

Where to use Seaweed Secrets:

Using Seaweed Secrets provides numerous benefits for your garden and lawn:

The Science Behind Seaweed Secrets

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.

Safety Guidelines

Product Application

APPLICATION RATE:

APPLICATION RATES

Popular Questions

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Another high quality product

Awesome product

Seaweed secrets

Outstanding service and fast shipping for an even

LUSH AND GREEN

Great product! Good results

better than the green shed

Amazing

Great stuff

Food for the soil

Great value!!

A++ kelp liquid for your lawn n plant

Simply the best !

Fantastic

Secret Sauce is Right!

Great product

Awesome product

plant doctor is the real deal

Seaweed booster

SS - Great value for money

Yes! Just yes!

Sensational mix

Bulk is the way to go

So worth it for the price!

Highly recommend

No 1 product in seaweed concentrated

Great health tonic for plants

BETTER THAN SEASOL

Outstanding

Value For Money and a Great Product

Best Concentrated Liquid Seaweed

Awesome for everything!

Happy with service

Love Seaweed Secrets

Great all-rounder

Quality Value

seaweed secrets

Sensational Seaweed

Great product

Used Regularly

Good Product

Great product

Good stuff!

Versatile organic tonic

Great replacement for seasol

Highly recommended

No odour. Great formulation!

Seaweed Secrets

So much better than Seasol

Great product

Excellent

Healthier Looking Lawn

Seaweed secrets

Good product

Great!

Helped my struggling lawn

The goods !

The Only Liquid Seaweed to Use

Seaweed Secrets

Customer Reviews

Billy Green

Michael Preddy

Tim McAuliffe