Boosted Liquid Fertiliser for Lawns, Plants & Soil Health
Activ8EXTRA is a biologically enhanced liquid fertiliser, boosted with a range of organic ingredients to improve soil health and feed beneficial soil microbes. Containing high nitrogen, it’s ideal for enriching soil and supporting the growth of lawns, leafy green plants, and trees. This liquid fertiliser is perfect for promoting vibrant, healthy lawns and garden plants, while enhancing soil structure.
Activ8EXTRA Liquid Contains:
Traditional chemical nutrients: Nitrogen, Phosphorus, Potassium (NPK), and essential trace elements
Seaweed (kelp)
Fish
Blood and Bone
High-quality USA Humates (Humus) / Fulvate, including Fulvic Acid
Benefits:
Inoculates Turf/Grass & Soil: Aids in converting fertilisers into complex plant nutrients for better absorption.
Enriches Soil: Provides essential feeding to improve plant health and growth.
Buffers Salts & Increases Micronutrient Availability: Enhances nutrient uptake for healthier, more resilient plants.
Promotes Soil Aeration & Water Penetration: Reduces runoff and improves root growth for stronger turf and plants.
Stabilises Nutrients: Keeps nutrients available in the rhizosphere over a longer period for sustained plant nourishment.
Safety Guidelines:
Keep out of reach of children. 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.
Ideal for:
Lawns, trees, and leafy plants in need of high-nitrogen fertilisation and enhanced soil health. Perfect for use in home gardens and professional landscaping.
(A8X)
Product Application
General Application Rate:
For best results, apply fortnightly during the warmer months. During cooler months, apply less often and/or at lower strength. Best applied all-year round to continue improving soil and feeding microbes.
75-100ml/100sqm – 7.5-10L per Ha
20-30ml (1-2 capfuls) per 9L watering can
Agitate well before use.
As there are many conditions that affect the exact amount needed and the frequency of application for each product, there is no one-size-fits-all solution.
Several Ways Our Liquids Can Be Applied:
Application Method
Instructions
Watering Can
Mix the amount suggested (typically 10‐30ml) per 9 litres of water. 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: 42
Fantastic
By: Brad 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.
Activ8 Extra
By: Bryce on 10 November 2024
Recently decided I would do more to look after my lawn, to help me achieve what I wanted this product has not only sped up the process but I’ve now got a really healthy lawn!! Highly recommend
working a treat
By: Jeremy on 21 October 2024
in combo with a range of plantdoctor products my lawn is going great!
Activ8EXTRA
By: Justin on 24 September 2024
Another great product from the team at Plant Doctor. Was drawn to this company as they have a strong background in horticulture/agriculture products where it is important to provide effective and efficient use of products. Backed by science, their products are easy to use with lower application rates avoiding unnecessary overuse of products.
Fantastic for pretty much everything
By: Dario on 7 May 2024
I’ve used this product on pretty much everything on my garden and seems to be doing a fantastic job.
Activ8EXTRA Boosted liquid fertiliser
By: Adam on 11 March 2024
Decided to go for a liquid fertiliser instead of the standard granular and it didn't disappoint.
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.
Activ8EXTRA Boosted liquid fertiliser
By: Andrew on 9 January 2024
Nothing compares to this product. Especially now during growing season. Grass and plants have never looked better and stay healthy for longer.
Top Quality
By: Justin on 25 October 2023
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. I used Activ8 previously, and this new EXTRA seems to work even better!
Love it.
By: Edwin on 18 October 2023
Seems to last forever with the dilution rate. Lawn loves it and plants love the overspray.
Great product
By: David on 27 August 2023
Very impressed, going to buy another 10 litres
give it the extra boot
By: David on 3 August 2023
This stuff is amazing. You will not be disappointed.
Amazing
By: Samuel on 10 January 2023
Great product once again
Giving the grass some love.
By: Stephen on 20 December 2022
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.
5 star praise
By: dion on 27 September 2022
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
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.
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.
Easy to use and cost effective
By: nicholas on 23 December 2021
When used as per instructions adds excellent growth to all plants and lawns highly recommended
Activ8 Extra
By: Lisa on 7 September 2021
I purchased this product for our Sit Walter lawn as wanted the grass to look more lush.
The product worked almost overnight. This is definitely the go to product to use to put the greeness back into the grass.
Results boosted
By: Tim on 23 August 2021
This is a boosted version of Activ8mate - I was happy with the original but if you want some more push with extra nitrogen then this is the one to get.
Grow baby!
By: BRETT on 12 August 2021
This stuff is amazing on lawns beautiful Green and lush Nature at its best
Activ8EXTRA Boosted liquid fertiliser
By: john on 7 July 2021
I feed this with the Seaweed Secrets to my lawn and plants and have gotten great results. Very economical as well. Great stuff.
Bang for buck
By: Steve on 2 July 2021
A great product from a great team.
Top quality - Super green
By: Christopher on 16 June 2021
Top quality liquid fertilizer, produces a really nice green colour in your lawn. Supplemented by the liquid iron product - contains a safe proportion of nitrogen so you wont burn your lawn, you wont be disappointed with this product.
Extra Kick liquid fert
By: Anferny on 11 June 2021
Having used the active8mate product which was fantastic.
So decided to get the active8extra product to see the performance you get. Everything just took off in growing despite the cold condition we are experience in winter condition, so definitely another product to add in your collection for that extra kick.
Works all the time!
By: Shoua on 4 June 2021
This is my 'go-to' liquid lawn fertilizer that I use every month to keep my lawn in 'tip-top' shape! It's a well rounded fertilizer that can also be used on plants and trees and extremely beneficial during Winter given that granules don't do a good job in the colder weather. Highly recommend for all lawn lovers and rest assured Activ8EXTRA will differentiate a great lawn from a good one!
Converted
By: Jon on 2 June 2021
I use to always use seasol on my lawn, since being told about Activ8extra I've been converted and so have my mates that I've told
Can notice the difference
By: Alana on 13 May 2021
Great product, can definitely recommend this as I can see larger leaf size and faster growth on my indoor plants.
Big Help with my Reno
By: Nathan on 28 December 2020
Activ8 Extra has been a big help bringing my Buffalo back from this years Reno!
Special Mix Product 3.
By: RON on 17 November 2020
This is the third product that I use in my special mix. The combination of all the products has improved my plants and lawn noticeably.
A great Liquid Fertiliser
By: Chris on 12 November 2020
The results were fast and exceptional. Not only has it helped with growth but made the leaf seem stronger, encouraged root growth and has made the lawn one of the best in the street. Very happy customer.
Great product
By: Troy on 15 October 2020
Use this on my hedges and grass with excellent results
Amazing product
By: Neeraj on 4 September 2020
Got it in Ben Sims pack. Amazing product
Amazing results.
By: Brandon on 23 July 2020
Got it in my Ben Sims pack. Absolutely stoked with the results
Great product
By: Stephen on 24 June 2020
Active8mate is very good, this one is even better!
Fantastic Results
By: Craig on 15 June 2020
I have applied this product mixed with Plant Dr Humic Acid and Im seeing a noticeably healthier looking lawn. Plant Dr's service is second to none with a 2 day delivery free over $50, very happy customer
Great Liquid Fertiliser
By: Mark on 15 June 2020
Easy to apply product using a hortex sprayer and gave the yard a really good pop. I teamed this up with the granular fert, no issues and great colour. I get a lot of great comments from friends and family that turn up to the newly invigorated lawn!
Bit extra for the lawn
By: Shannon on 11 June 2020
Loved the first active8mate, but this has a few extra goodies in it for that extra boost
Thick Turf
By: Ellie on 9 June 2020
Since using this my turf has thickened up so well. It also has a very nice green colour to it. I have noticed I am not watering as much either.
This stuff is great
By: Steven on 29 February 2020
Just started using this product and applying as it sais on label and im seeing great results with it.
Really works!
By: anthony on 23 December 2019
I used this liquid fert during the recovery phase of my lawn renovation, and it really improved recovery time. Good for a rapid green up.
The boost you need!
By: Rhys on 10 November 2019
In conjunction with my granular fertilizer, the boost of nitrogen really gives my grass the boost it needs
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Customer Reviews
5
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
5
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
5
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!