I grow rare cactus and succulents and after experimenting with Mycorrhizal inoculants I’m completely blown away with results I’ve seen. Even with soil that dries out completely between water (for extended periods of time) they still work their magic wonderfully and I see wonderful growth and survival with the roots showing the fungi growth as shown and described in this article.
Where do you get your inoculants / which do you get? I'm a mere dabbler in growing cactuses, but very curious to hear what worked for you