Mycorrhizae helps you grow better, healthier plants.

Mycorrhizae (it means fungus root) are a group of about 400 fungi that form symbiotic relationships with plants. They live in or on the roots, extend their hyphae into the soil and make phosphate, nitrogen, other nutrients and water available to the host plant. They extend the effective root area many hundreds of times so plants grow faster, larger and stronger with less fertiliser and water.

Root Better

  • Ideal for trees, shrubs, pot plants, vegetables and flowers
  • Massively increases growth rate of plants, improving fruit, vegetable yields and blossoms
  • Can double the rate of growth in new plants
  • Increases the root's surface area, increasing water and nutrient uptake
  • Improves resistance to drought stress in dry conditions
  • Easy to use, applied directly to the roots or seed before planting


Root Better gives your plants the Mycorrhizal Advantage that can double the growth rates of young plants. Potting compost, fallow soil and nursery plants raised on fertiliser and fungicides do not contain essential mycorrhizae.

Pack provides 8 species of common endo mycorrhizae and 7 species of ecto mycorrhizae that associate with nearly all plants; it also contains beneficial soil bacteria and fungi, zeolites and trace elements.

Application is easy, just dust the powder onto seeds, bulbs, tubers or roots for a massively extended root system. If you wish to use it with plants already growing, inject the product mixed with water to the root area or drench the soil around plant roots. Mix the powder with enough water to 1g/L of root ball. (Does not work on brassicas or ericaceous plants)

Frequently Asked Questions

Q. What are mycorrhizal fungi?

A. Mycorrhizal fungi live in soil and colonize roots forming a biological link between the plants and the soil. The fungus grows on or into the root and extends hyphae into the soil. Mycorrhizae absorb water and nutrients from the soil and introduce them into the root. Mycorrhizae can solubilise nutrients like phosphate that are locked up in the soil. They effectively enlarge the root system and its surface area from double to up to 1000 times so mycorrhizal plants have access to much more nutrient and water than non mycorrhizal plants to grow faster and larger.

Q. Which plants associate with mycorrhizae?

A. About 95% of plants form a symbiotic association with mycorrhizal fungi , for the average garden the only plants that do not associate are brassicas e.g. cabbages, brussel sprouts and beets very few annual plants and grasses.

Q. Do all plants need the same mycorrhizal fungi?

A. No. Most perennial plants, shrubs trees, vegetables and grasses associate with endo mycorrhizae that live in the root system. Coniferous trees and oak, beech, birch, chestnut and hickory associate with ecto mycorrhizae. These live in the soil on the outside of the root. Ericaceous plants and orchids associate with their own species as well.

Q. When is inoculation with mycorrhizal fungi needed?

A. If your field, vegetable patch or flower bed has not given results that you were expecting, mycorrhizae is probably not present and inoculation is needed. Nursery grown plants grown in sterile growing media and fed with fertiliser, water and pesticides will not have mycorrhizal associations and inoculation is needed. If you plant a conifer or beech tree into a lawn or grassland, the mycorrhizae in the soil will be endo mycorrhizae, the wrong type for conifers, so inoculation with ecto mycorrhizae will be needed. If you are planting into heavily disturbed soil, salted or fertilised soil on a building site, ploughed field, roadside or landscaping project, inoculation will be needed.

Q. How do I apply mycorrhizal inoculums?

A. Mycorrhizal fungi live on the roots so any method you employ to get the mycorrhizae onto the root of the plant will work.
For seeds you can mix with inoculum before planting or dust powder into the seed drill.
For all other transplants either dust or drench the mycorrhizae onto the roots before planting or apply to the planting pit.

For stressed established trees either drill down to the roots with a fork or augur around the drip line approx 0.5 meters apart, put the mycorrhizae in a solution with enough water to reach the feeder roots and pour it down the holes; or use specialist ground aeration equipment e.g. Gwazae to aerate and inject the soil.

Q. Can I overdose?

A. Effectively no but do not put too much carrier around seeds.

Q. What is the minimum amount of inoculum needed to form mycorrhizae?

A. In theory Mycorrhizae can form from only one spore that germinates and infects a root,
In practice you get a better result by spreading spores evenly around the root system. Different products have different spore quantities so we suggest that the manufacturers recommendations are followed.

Q. Are some types of mycorrhizae better for some plants or soil conditions?

A. Yes that is why our product has eight different species of endo mycorrhizae and seven different

species of ecto mycorrhizae in its products to account for most conditions and plants.

Q. Can I apply pesticides with mycorrhizal fungi?

A. Foliar pesticides usually do not have any adverse effects on mycorrhizae formation or function. Some fungicides applied to soil do inhibit mycorrhizae a link to fungicide compatibility; soil fumigants such as steaming or methyl bromide do kill mycorrhizal fungi.

Q. Do fertilizer applications affect mycorrhizae?

A. Mycorrhizae absorb nutrients into the plant and take carbon from the plant to grow. If the plant is sitting in a sea of inorganic soluble fertiliser especially phosphorous it does not need mycorrhizal fungi to access nutrients and mycorrhizal formation will be inhibited or cease. Use organic forms of fertilisers where possible or as a general rule reduce inorganic fertilisers by about 50% to get the same growth result.

Q. Do mycorrhizae control plant diseases?

A. Mycorrhizae improve the health of plants and their roots, so diseases may cause less damage. Mycorrhizae and symbiotic bacteria and fungi also form a barrier around the root system so it may be more difficult for pathogens to attack the plant allowing mycorrhizal plants to better resist infections by plant pathogens.

Q. Are mycorrhizal fungi present in compost?

A. No. Mycorrhizae need living plant roots to survive.

Q. How long do mycorrhizal fungi survive in soil without an active root system?

A. Endo mycorrhizae survive for a short term most no more than a few weeks without a host plant to live on. Ecto mycorrhizae may survive for longer periods.

Q. Can mycorrhizal inoculum be applied to established plants?

A. There is little point in adding mycorrhizae to a healthy well established plant as it will most likely be colonised. However if the tree, shrub or vine is stressed due to compaction, over fertilization with inorganic fertilisers (mineral salts), road salt or if the plant has not grown since being transplanted then inoculation will probably help. 

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ROOT BETTER Mycorrhizal fungi 5g, Better Organix

  • 2.75€