Frequently Asked Questions

Answers to the most common questions from our wholesale customers.

About Mycorrhizae

What is mycorrhiza?
Mycorrhizal fungi form a symbiotic relationship with plant roots, dramatically extending the root system. Plants gain improved water and nutrient uptake; the fungi receive carbohydrates from the plant. More than 90% of plant species form these relationships naturally.
What's the difference between endo and ecto mycorrhizae?
Endomycorrhizal fungi penetrate root cells and work with most vegetables, flowers, grasses, and deciduous trees. Ectomycorrhizal fungi colonize the root surface and are essential for conifers, oaks, and beeches. For mixed plantings, use our Endo/Ecto blend to cover all plant types.
Why don't plants already have mycorrhizal fungi?
Common agricultural and landscaping practices — tillage, soil removal, compaction, fumigation, and leaving soil fallow — eliminate the natural mycorrhizal population. Container-grown nursery stock is also typically free of mycorrhizae, making inoculation at planting time critical.

Products & Application

Will mycorrhizal products work with my existing fertilizer program?
Yes, with one caveat: avoid high-phosphorus fertilizers during the first 4–6 weeks after application. High phosphorus suppresses mycorrhizal colonization. Nitrogen and potassium at normal rates are fine, and our Nitrogen Fix product pairs very well with all mycorrhizal inoculants.
Can I apply mycorrhizal products through my irrigation system?
Yes — our Soluble Maxx product is specifically designed for this. It dissolves completely and is compatible with drip irrigation and fertigation systems. Granular products should be applied directly to the root zone at planting.
Are your products OMRI listed for organic production?
MycoApply Ultrafine Endo and Soluble Maxx are OMRI listed for organic production. Contact us for current certifications on other products as listings are updated periodically.

Orders & Shipping

What is your minimum order?
There is no minimum order for standard wholesale pricing. For custom pricing on large or recurring orders (10+ units), use our bulk quote form and we'll get back to you within 1 business day.
How long does shipping take?
Orders placed before 2 PM (Pacific Time) ship same day. Standard ground shipping is 3–5 business days nationwide. Expedited 2-day and overnight options are available at checkout.
Can I return a product?
Unopened products in original packaging may be returned within 30 days of the ship date. Contact us to receive a Return Authorization number before shipping back. Refunds are processed within 5 business days of receiving the return.