What is Activ8EXTRA used for?

Activ8EXTRA is a high-nitrogen liquid fertiliser enriched with organic ingredients like seaweed, fish, humates, and blood and bone. It's designed to feed lawns, leafy plants, and trees while improving soil structure and microbial health.

What’s the difference between Activ8MATE and Activ8EXTRA?

Both are biologically enhanced liquid fertilisers, but Activ8EXTRA is higher in nitrogen and better suited for vigorous growth in lawns and leafy plants. Activ8MATE has a broader nutritional profile for general soil and plant health, especially during seasonal transitions or when microbial activity needs a boost.

How often should I apply Activ8EXTRA?

Apply every 2–4 weeks during the active growing season. For best results, pair with watering or rain to move nutrients into the soil.

How much Activ8EXTRA should I use?

Apply 1ml per 1sqm or 75–100ml per 100sqm, diluted in water. Always trial on a small section before widespread use, especially with new application rates.

Can I use Activ8EXTRA on all lawn types?

Yes, it's suitable for all Australian lawn varieties, including buffalo, couch, kikuyu, and zoysia.

Is Activ8EXTRA safe for all plants?

Yes, it can be used on lawns, leafy green plants, trees, and shrubs. Avoid use on sensitive, young or native plants unless tested first.

Should I mow before or after applying Activ8EXTRA?

Apply before mowing for optimal absorption and to prevent product removal through clipping.

Do I need to water in Activ8EXTRA?

Yes, a light watering after application helps deliver nutrients to the root zone and activates soil biology.

Can I mix Activ8EXTRA with other products?

Yes, but avoid mixing with iron-based products as they may be incompatible. Always jar test before combining products in a tank.

Is Activ8EXTRA pet- and child-safe?

Yes, once dry. Keep children and pets off treated areas until the product has fully dried to avoid contact with active ingredients.

What are the key ingredients in Activ8EXTRA?

Activ8EXTRA contains nitrogen, phosphorus, potassium, trace elements, seaweed, fish, and high-quality humates including fulvic acid.

Can I use Activ8EXTRA during hot weather?

Yes, but apply early morning or late afternoon and avoid high-heat periods. Always water in well to prevent plant stress.

Activ8EXTRA Boosted liquid fertiliser and inoculant for lawns and leafy plants

Activ8EXTRA Boosted Liquid Fertiliser - 4L

NPK: 16-2-5 + Trace elements

High-nitrogen liquid fertiliser and soil conditioner enriched with seaweed, fish, blood and bone, plus humic and fulvic acids. It promotes lush green growth, improves soil health, feeds beneficial microbes and enhances nutrient availability.

16-2-5 NPK + T/E & Seaweed Fast Green-Up & Growth Fixes Yellow, Weak Lawns

Lawns Gardens Farms

Boosted Liquid Fertiliser for Lawns, Plants & Soil Health

High-Performance Liquid Fertiliser to Feed Your Lawn and Revive Your Soil

Activ8EXTRA is more than just a fertiliser, it’s a biologically boosted blend designed to feed both your plants and your soil. Infused with organic ingredients like seaweed, fish and fulvic acid, it delivers fast-acting nitrogen along with the natural compounds your soil microbes crave. Whether you’re growing a lush lawn, thriving veggie patch, or leafy trees, Activ8EXTRA helps you build healthier soil and deliver greener, stronger growth, all in one easy liquid application.

Use Activ8EXTRA when your lawn or soil needs a nitrogen boost, improved biology, better water absorption, recovery after chemical use, or preparation for planting as part of an organic or regenerative program.

I started using this about a week ago after adding Nature's Soil wetter to my lawn. Wow..... What a difference it makes. My grass in responding so quickly. Before it was hard to get it to do anything. This stuff is like gold in a bottle. I had some dead and dying areas of grass but now they are lush, green and filling in again.

— Stephen

Why Choose Activ8EXTRA:

Strong leaf growth with high nitrogen
Feeds and activates beneficial soil microbes
Improves soil aeration and water penetration
Enhances nutrient uptake and micronutrient availability
Reduces fertiliser leaching and locks nutrients in the root zone
Made with fish, kelp, humates, blood & bone, and fulvic acid
Works across lawns, garden beds, trees, and vegetables

Nutrient Profile:

Nitrogen

16%

Phosphorus

Potassium

Feed Your Lawn & Soil the Right Way. Activ8EXTRA gives your lawn and garden the nutrients they need and builds the soil biology to sustain long-term growth. Whether you’re a weekend gardener or managing large-scale turf, this all-in-one fertiliser helps your landscape flourish, from the soil up.

Type	Application Rate
Minimum dilution rate:	1:100	Apply fortnightly or when feeding is required
General application:	75-100ml/100sqm 7.5-10L per Ha
Watering Can:	20-30ml/9L *Spread evenly across the area to fertilise.
Hose‐on Bottle (Seasol/weed ‘n feed etc.) or Hortex Sprayer	Mix the minimum amount of water with the product/s to allow you to cover the required area/s. _{For example, for my front yard, using an old weed n feed hose‐on bottle, I add 100ml of each Seaweed Secrets, Activ8mate or Activ8EXTRA, and Nature's Soil Wetter, then top up with enough water to allow you to evenly cover it using the hose‐on bottle (I add about 600ml water), then evenly hose‐on.}
Pressure/Knapsack Sprayer	You need about 15 litres (a little more or less won’t hurt) of water to be applied per 100m², so take that into consideration when applying. If you have a smaller sprayer, either do several smaller applications (i.e., covering 50m² at a time and repeat until the entire area is covered), or over a larger area spray with the required amount. If you haven’t used 15 litres/100m², give a light water‐in. If using a Hortex sprayer on setting 2 without the restrictor, you shouldn’t need to add water, but if you do, just add as little amount to cover the required area.

Type

Application Rate

Minimum dilution rate:

1:100

Apply fortnightly or when feeding is required

General application:

75-100ml/100sqm

7.5-10L per Ha

Watering Can:

20-30ml/9L

*Spread evenly across the area to fertilise.

Hose‐on Bottle (Seasol/weed ‘n feed etc.) or Hortex Sprayer

Mix the minimum amount of water with the product/s to allow you to cover the required area/s.

_{For example, for my front yard, using an old weed n feed hose‐on bottle, I add 100ml of each Seaweed Secrets, Activ8mate or Activ8EXTRA, and Nature's Soil Wetter, then top up with enough water to allow you to evenly cover it using the hose‐on bottle (I add about 600ml water), then evenly hose‐on.}

Pressure/Knapsack Sprayer

You need about 15 litres (a little more or less won’t hurt) of water to be applied per 100m², so take that into consideration when applying. If you have a smaller sprayer, either do several smaller applications (i.e., covering 50m² at a time and repeat until the entire area is covered), or over a larger area spray with the required amount. If you haven’t used 15 litres/100m², give a light water‐in. If using a Hortex sprayer on setting 2 without the restrictor, you shouldn’t need to add water, but if you do, just add as little amount to cover the required area.

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Amount of Reviews:

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.

Great adjunct liquid

By: Andrew on 11 February 2022

Added this into my foliar program for the 2021/22 season and have been happy with it. It’s great to have a turf product with a bit more P and K for foliar application.

give it the extra boot

By: David on 3 August 2023

This stuff is amazing. You will not be disappointed.

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.

Fantastic

By: Tom on 21 November 2024

I was recommended this by a friend to supplement my application of slow-release granular fertiliser. This liquid product is much faster acting and easier to apply. Highly recommend.

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!

NPK:	16-2-5 + micronutrients
Additional Components:	Fish hydrolysate, providing amino acids and natural growth enhancers Seaweed (Ascophyllum nodosum), rich in cytokinins, auxins, and anti-stress compounds Humic and fulvic acids (USA-sourced), for increased nutrient chelation, improved soil CEC, and microbial stimulation A blend of trace elements that address common deficiencies in Australian soils

Activ8EXTRA Boosted Liquid Fertiliser - 4L

NPK: 16-2-5 + Trace elements

Notify me when back in stock

Description

Boosted Liquid Fertiliser for Lawns, Plants & Soil Health

Feed Your Lawn & Soil the Right Way. Activ8EXTRA gives your lawn and garden the nutrients they need and builds the soil biology to sustain long-term growth. Whether you’re a weekend gardener or managing large-scale turf, this all-in-one fertiliser helps your landscape flourish, from the soil up.

Features

Specifications

How it Works

Application

Need Help with Application Rates?

Safety

Safety Guidelines

FAQ

What is Activ8EXTRA used for?

What’s the difference between Activ8MATE and Activ8EXTRA?

How often should I apply Activ8EXTRA?

How much Activ8EXTRA should I use?

Can I use Activ8EXTRA on all lawn types?

Is Activ8EXTRA safe for all plants?

Should I mow before or after applying Activ8EXTRA?

Do I need to water in Activ8EXTRA?

Can I mix Activ8EXTRA with other products?

Is Activ8EXTRA pet- and child-safe?

What are the key ingredients in Activ8EXTRA?

Can I use Activ8EXTRA during hot weather?

Reviews

Great value !!

Great adjunct liquid

give it the extra boot

LUSH AND GREEN

Fantastic

Warranty

90 Day Money Back Guarantee

Shipping

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Customer Reviews

Billy Green

Michael Preddy

Tim McAuliffe

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