Mycorrhizal Inoculant
A concentrated preparation of beneficial mycorrhizal fungi applied to plant roots to establish a symbiotic network that dramatically expands nutrient and water uptake.
What it is
Mycorrhizal inoculants contain spores and propagules of symbiotic fungi that naturally colonise plant roots. In exchange for sugars from the plant, the fungal network extends the effective root system by many times, reaching water and nutrients the plant roots cannot access alone. They are suitable for organic production and have no chemical content.
What it does
Once established, mycorrhizal fungi form an intimate connection with root cells and extend a fine hyphal network through surrounding soil. This network dramatically increases the root surface area available for nutrient and water absorption. The fungi also produce compounds that suppress some soilborne pathogens, improve soil aggregate structure, and enhance plant immune signalling.
When to use
Apply at transplanting by dusting spores directly onto moist root surfaces or by mixing into the backfill soil of the planting hole. Can also be incorporated into seed-starting mix for direct-seeded crops. Particularly beneficial in new beds with low biological activity, or after soil disturbance that has depleted native fungal populations.
When not to use
Mycorrhizal inoculants are ineffective on plants in the Brassicaceae family (brassicas) and some Chenopodiaceae (beet family), which do not form mycorrhizal associations. Avoid applying phosphorus fertilisers at the same time, as very high phosphorus levels inhibit fungal establishment by reducing the plant's incentive to form the symbiosis.
How to apply
- 1
Open the inoculant package immediately before use and handle gently to preserve spore viability.
- 2
For transplants, dust or sprinkle the recommended amount directly onto moist root surfaces just before planting.
- 3
Alternatively, mix the inoculant with a small amount of moist compost or potting mix and coat the root ball before placing in the planting hole.
- 4
Backfill with soil, water in gently, and avoid high-phosphorus fertilisers for 4 - 6 weeks to allow fungal establishment.
- 5
For direct seeding, mix the inoculant into the seed drill or furrow soil at the rate specified on the package before placing seeds.
Used for
Garden, by Willowbottom recommends only organic, wildlife-friendly solutions. No synthetic pesticides, no harmful chemicals - ever.