Welcome to Horticultural Alliance Technical Support for DIEHARD™ Mycorrhizal Inoculants. 

Horticultural Alliance is committed to satisfying the needs of our customers. The Horticultural Alliance Technical Support group provides expertise in technical support to help ensure that our customers' technical questions and issues are quickly addressed.

General FAQ's - Answers to some common questions about using DIEHARD™ Mycorrhizal Inoculants.

Tips on using DIEHARD™ Mycorrhizal Inoculants.

Application Info - Topics related to DIEHARD™ Mycorrhizal Inoculants specific to the various applications.

Customer Service Order and Download Help  - Some tips on non-technical, service-related issues such as purchasing and billing, downloading our brochures, specification sheets and MSDS sheets.