Dr Greenthumbs Root Roids (Root Health & Plant Support)

Dr Greenthumbs Root Roids is Australia's favourite rootzone biostimulant & growth enhancer created with 100% Organic & Living ingredients!

Watch our video below & check our our 5 star reviews!

For a broader view of the range, see our roundup of the top five best-selling Dr Greenthumbs products of 2025.

• Root Roids is a premium combination of Mycorrhizae & Nutrient Solubilizing Bacteria, manufactured and formulated in Australia by Dr Greenthumbs in Wollongong, NSW. 

• Create massive colonies of Living Soil microorganisms directly in your root zone with our highly targeted Mycorrhizae & beneficial bacteria.

• Designed to compliment any nutrient program to increase yields and flavor. Perfect for Coco & Soil growers. This is Australia's answer to Mykos!

• Naturally unlock & retain nutrients for longer, leading to stronger plants, faster growth rates & masses of healthy roots.
  
  
• Growers are reporting 7-10 days shortening of the vegetative growth period due to massive increases in plant growth and vigor.
  
  
• Hydroponic growers can enjoy a 15-25% reduction in fertilizer costs whilst growing far superior quality flower.

• Noticeable results in just 48hrs

30 Day Money Back Guarantee! If you are not satisfied with the product, return it to us with at least 50% of its contents for a full refund of your product price!

How To Use

Indoor Applications

• Coco Coir / Soil Less Media - Use ½ to 1 scoop per liter of water. Use weekly throughout the vegetative & flowering stages for best results.

• Organic Soil - Use ½ to 1 scoop per liter of water. Use weekly throughout the vegetative & flowering stages for best results.

• Hydroponic / Water Cultivation - Use ½ scoop per liter of water. Use fortnightly for best results. For best results use in agitated/active systems. If using passive hydroponics, replace the solution with fresh water after 48hrs.

• Propagation - Use 1/4 scoop per liter of water & drench your growing media thoroughly. Repeat when the first signs of roots appear.

• Foliar Spray - Use ½ scoop per liter of water. Spray plants at night & allow to rest 10 hours. Use fortnightly for best results. May stain some surfaces.

If growing in Coco stop using Root Roids 1 week before your flush period. When mixing with nutrient solutions, add Root Roids last & after you have pH adjusted your tank. Your waters pH will raise slightly but this does not need to be corrected & will buffer once applied to the root zone.

Ingredients: Rhizophagus irregularis, Glomus mosseae, Glomus etunicatum, Glomus aggregatum Bacillus subtilis, Trichoderma harzianum, Beauveria bassiana, and 100% organic based microbe food - Humic Acid, Fulvic Acid, 9 Amino Acids, Kelp Extract, Cold Water Algae Extract.

Frequently Asked Questions

What are the key ingredients in Root Roids and how do they benefit plant growth?

Root Roids is a blend of Mycorrhizae and Nutrient Solubilizing Bacteria, which create colonies of living soil microorganisms in the root zone. This enhances nutrient absorption, leading to faster growth rates, stronger plants, and a healthier root system.

For a broader look at how this fungal partnership works, when to inoculate and how different formats are used, see our guide to mycorrhizal fungi in Australian gardens.

Can Root Roids be used with any type of growing media?

Yes, Root Roids is designed for use with various growing media. It’s perfect for Coco and Soil growers, and can also be used in Hydroponic/Water Cultivation and Organic Soil. The application method varies slightly depending on the media.

For a plant-specific example of where root support fits into repotting and propagation, see our rubber plant care in Australia guide.

How does Root Roids affect the vegetative growth period of plants?

Growers have reported a 7-10 day reduction in the vegetative growth period with Root Roids. This is due to the product’s ability to significantly increase plant growth and vigor.

Are there any special instructions for using Root Roids in Coco Coir?

When growing in Coco Coir, it’s recommended to stop using Root Roids one week before the flush period. Additionally, Root Roids should be added last when mixing with nutrient solutions, after pH adjustment of the tank.

How should Root Roids be applied for the best results?

For Coco Coir/Soil Less Media and Organic Soil, use ½ to 1 scoop per liter of water weekly throughout the vegetative and flowering stages. In Hydroponic systems, use ½ scoop per liter of water fortnightly. For propagation, use 1/4 scoop per liter of water, and as a foliar spray, use ½ scoop per liter of water fortnightly.

What are the specific benefits for hydroponic growers using Root Roids?

Hydroponic growers using Root Roids can experience a 15-25% reduction in fertilizer costs. Additionally, it helps in growing superior quality flowers and eliminates detrimental organisms in the root zone, enhancing overall plant health.

For a broader look at how organic inputs and biology behave in hydro systems, see our organic hydroponic nutrients guide.

How quickly can results be seen after using Root Roids?

Noticeable results from using Root Roids can be seen as quickly as within 48 hours. This rapid response indicates the efficiency of the product in enhancing root growth and nutrient uptake.

Is there any risk of staining when using Root Roids as a foliar spray?

Yes, when using Root Roids as a foliar spray, there is a possibility that it may stain some surfaces. It’s recommended to spray plants at night and allow them to rest for 10 hours, using ½ scoop per liter of water and applying it fortnightly for best results.