Seaweed Secrets 1000L IBC Bulk Liquid Kelp, Premium Crop & Turf Seaweed Biostimulant

Seaweed Secrets 1000L IBC Bulk Liquid Kelp, Premium Crop & Turf Seaweed Biostimulant

MADE TO ORDER

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
LawnsGardensFarms
$4,563.00
In Stock
Write A Review
Please call the office to order. Note: This item is 1000L in an IBC shuttle. Forklift delivery for a pallet is required and is available for commercial premises only. Made to order – please allow 2 weeks for dispatch. Cannot be delivered to residential zones.

Call to order

Please call the office to order. Note: This item is 1000L in an IBC. Forklift delivery for a pallet is required and is available for commercial premises only. Made to order, please allow 2 weeks for dispatch. Cannot be delivered to residential zones.

Call 1300 385 842

Description

Commercial 200 L & 1000 L IBC Formats for Professional Turf, Horticulture & Broadacre Use

Seaweed Secrets is a high-performance liquid soil conditioner formulated for commercial growers, turf managers, nurseries, and broadacre operations seeking reliable, economical biological support at scale. Made from premium Ascophyllum nodosum kelp and enhanced with humic and fulvic acids, it delivers a consistent supply of bioactive compounds that improve soil function, strengthen plant resilience, and increase nutrient efficiency across all production systems. Designed for large-scale fertigation, boom spraying, and turf care programs, Seaweed Secrets provides a dependable biological foundation that supports faster establishment, stronger rooting, and improved quality in both soil- and substrate-based production.

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

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. 

Why commercial growers choose Seaweed Secrets:

  • High-analysis kelp extract for consistent, repeatable results in professional systems
  • Improves soil biology & microbial activity, increasing nutrient mineralisation
  • Enhances stress tolerance during heat, drought, salinity, frost, or transplant shock
  • Strengthens root growth and early establishment, ideal for turf, seedlings, and cropping
  • Boosts fertiliser efficiency via humic/fulvic chelation and increased nutrient uptake
  • Supports soil structure by improving moisture retention and aeration
  • Clean, low-odour, low-sludge formulation suitable for fertigation and spray systems
  • Safe for all crops, turf species, nursery stock and environmental areas
  • Made in Australia for Australian conditions 

Nutrient Profile: 

N
Nitrogen
0.04–0.07%
P
Phosphorus
0.05–0.15%
K
Potassium
2500–6000 ppm
S
Sulphur
400–1200 ppm
Mg
Magnesium
<0.40%
Ca
Calcium
<0.01%
B
Boron
0.13%
Fe
Iron
<0.10%
Zn
Zinc
1–5 ppm
pH
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

Seaweed Secrets delivers a reliable, scalable and cost-efficient biological input for professional growers, turf managers and agricultural operations. Its combination of kelp, humic and fulvic acids provides consistent improvements in soil function, root development and plant performance, making it a core component in modern, biologically focused fertility programs.

(SWS_IBC)

Features

Benefits of using Seaweed Secrets commercially:

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. 

How it Works

The Science Behind Seaweed Secrets:

Seaweed Secrets is based on the combined 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

Application

  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  

 

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

Download Application Rates Document

 

Safety

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

FAQ

How soon after applying Seaweed Secrets can commercial turf be mown?

Allow 8–12 hours before mowing to ensure full foliar absorption across large turf areas.

Should mowing occur before or after applying Seaweed Secrets?

Apply after mowing to maximise leaf contact and overall efficiency, especially for broadacre turf.

How often should Seaweed Secrets be applied at commercial scale?

Apply every 2–4 weeks, or weekly during stress, recovery, or peak growth periods.

What is the recommended application rate for Seaweed Secrets?

Rates vary by sector. Refer to the commercial rate guide for turf, agriculture, nurseries, and horticulture.

Which application method is recommended for large-scale use?

Compatible with boom sprayers, fertigation systems, backpack sprayers, and hose-end equipment. Light watering-in is recommended if applying by pressure spray.

Can Seaweed Secrets be used on all turf varieties?

Yes. Safe for all warm- and cool-season grasses including couch, buffalo, kikuyu, zoysia, rye, and bentgrass.

What benefits does Seaweed Secrets provide for commercial turf and crops?

It supports root growth, stress tolerance, microbial activity, moisture efficiency, and uniform colour across high-use and production settings.

Can Seaweed Secrets be used during summer?

Yes. Ideal for use during heat, drought, high traffic, and recovery phases.

Is Seaweed Secrets organic?

It is naturally derived from cold-processed Ascophyllum nodosum. Not certified organic but fully natural and environmentally safe.

Can Seaweed Secrets be tank-mixed with other fertilisers?

Yes. Compatible with most fertilisers and biologicals. Conduct a jar test before large-scale mixing.

Is Seaweed Secrets safe for pets and kids?

Yes. Once dry, treated turf or crops are safe for workers, public access, pets, and wildlife.

Reviews

Be the first to review this product

Share how it worked in your garden to help other Plant Doctor customers choose with confidence.

Write a product review

Shipping

Calculate Shipping

Application rates

Get the right amount for your lawn or garden, without the guesswork.

Open calculator

Care calendar

Build a 12-month lawn and garden plan around this product.

Build your calendar

Usage guide

A printable guide to how and when to apply Plant Doctor products.

Download PDF

Customer gallery

Lawns & gardens

Real results from Plant Doctor lawnies — see the stories behind the green.

View full gallery

Money Back Guarantee

Money Back Guarantee

Put your mind at ease with our 100% 90 day money back guarantee

Australian Owned

Australian Owned

Australian family owned and operated. Online sales since 2009.

Flat Rate Shipping

Flat Rate Shipping

Flat-rate shipping from $9.95* Fast and affordable!

$9.95 orders under 1kg/1L • $14.95 orders up to 50kg • $49.95 orders over 50kg. Does not include express. Some location exclusions apply.
View shipping policy for more info

FAST Dispatch

FAST Dispatch

Quick and reliable dispatch Australia-wide*

*Monday - Friday (Excludes Public Holidays)

From verified customers

What gardeners are saying

5.0 from verified reviews

Review of Nature's Soil Wetter Liquid Concentrate, Wetting Agent for Water Repellent Garden Soil - 1

Fantastic Product! Seeing is believing…

My lawn was showing signs of being rather hydrophobic last season so over winter I started applying the Natures Soil Wetter regularly, this allowed the winter rains to get it into the soil profile. The result are have been amazing and a complete turn around, I will be definitely using this product ongoing after seeing the positive results!

NoelL. Verified review

Review of Seaweed Secrets Liquid Kelp Tonic, Humic & Fulvic Acid Lawn & Garden Biostimulant - 1L

Seaweed Secrets..

Very impressed with this product so much so that I bought a 5 litre bottle. The results are just amazing after using it to water my seedlings regularly. They are very healthy and have fattened up. I would call this stuff liquid gold.. well done plant doctor, I look forward to purchasing more of your products..

DonM. Verified review

Review of Liquid Fulvic Acid Lawn & Garden Biostimulant, Premium Soil Nutrient Chelator - 1L

Seed Germination

I have tried the fulvic acid on seed germination with fantastic results. Soaked Adenium seeds overnight in diluted fulvic acid.. the results were amazing, once the seeds were planted they germinated a lot quicker than normal with nearly 100 % germination. Very happy with this product and can totally recommend to others.

DonM. Verified review

Review of MSM Capsules – High-Purity Organic Sulphur 460mg

MSM Supplement 460mg

This MSM Supplement has made a significant difference to my recovery from a serious Lis Franc foot injury after months of little to no improvement. Less pain and more elasticity in the badly injured area of the foot. Could not be happier.

MarleneB. Verified review

Review of Quantum H® Liquid Humic Acid Lawn & Garden Soil Conditioner - 1L

Brilliant

I have been using Quantum H on my Santa Anna lawn now for years in conjunction with other PD products and the results have been consistently brilliant. I have found that maintaining soil health is critical component in lawn care, and Quantum H is definitely a part of a “system” to use to achieve results.

NoelL. Verified review

Review of Nature's Soil Wetter Granules for Lawns & Gardens, Organic Non-Petrochemical Surfactant -

Great Soil Wetter for Tough SE Queensland Conditio

We use Nature’s Soil Wetter Granular regularly across a variety of residential and commercial garden sites throughout SE Queensland, particularly in areas struggling with dry patch, water repellency, or inconsistent moisture penetration. It’s been a reliable product for improving water absorption and helping irrigation work more effectively. We’ve seen noticeable improvement in overall soil moisture retention and plant performance after application. Easy to spread and integrates well into regular maintenance programs.

DaleR. Verified review

Review of Flowers, Fruits & Roots Granular Garden Fertiliser, High Potassium 8-2-20 with Silica - 20

Excellent All-Round Fertiliser for Productive Gard

We’ve had consistently great results using Flowers, Fruits & Roots Granular Fertiliser across a range of ornamental and edible gardens throughout SE Queensland. It promotes healthy growth, strong flowering, and noticeable improvement in overall plant vigour. We’ve particularly liked the balanced response across flowering shrubs, fruiting plants, and root development in newly established gardens. Easy to apply and a reliable product to keep on hand for ongoing garden maintenance and seasonal feeding.

DaleR. Verified review

Review of Champion Lawn & Fairway, Slow Release Granular Lawn Fertiliser, 2-4mm - 20kg

Reliable Results Across SE Queensland Sites

We exclusively use CHAMPION Lawn & Fairway Fertiliser across our maintenance and turf sites throughout SE Queensland and have consistently had great results with it. Provides strong colour response, healthy steady growth, and performs well across a range of lawn types and conditions. Easy to spread evenly and has become one of our go-to products for keeping lawns looking healthy and presentable year-round. Highly recommend for both professional contractors and home lawn enthusiasts.

DaleR. Verified review

Review of PREMIUM Fossil Shell Flour®: Food Grade DE Diatomaceous Earth - Organic - 800g

Organic Diatomaceous Earth Powder (Food Grade Foss

I’m really impressed with Plant Doctor's PREMIUM Fossil Shell Flour. The powder is finely milled, so smooth it mixes easily into water, smoothies or morning coffee without any grittiness. It’s simple to use, and appreciate that it has no taste or smell. The 800g bag is great value and will last a long time when using a teaspoon daily. Have observed improvements in my digestion and energy levels, and general skin feel too. Delivery was super quick, and the packaging is resealable and well-labeled. The quality is outstanding, and I know exactly where I’ll be getting my next supply, definitely sticking with Plant Doctor. Many thanks to the team!

ColinC. Verified review

Review of Lawn Lovers Pro Pack 5-Step Liquid Lawn Fertiliser Kit, Complete Care Program - City 1000m

Noticeable Lawn Improvement Fast

I’ve only got great things to say about Plant Doctor, especially the Lawn Lovers Pro Pack – City (1000sqm). The organic products are high quality and competitively priced, with fast shipping and excellent customer support whenever I’ve had questions. The special lawn mix has delivered fantastic results, and my lawn has never looked healthier. It’s been easy to use and clearly loved by the grass. Highly recommend to anyone serious about improving their law

TimothyA. Verified review

Website

Service

About Us

Information

© 2026 Plant Doctor. All Rights Reserved.