i think Mycorrhizae is very important with Lychee trees
really, soil biology in general.
i had several seedlings, but they were not really growing.
i used fish and molasses, comfrey and then added a few compost worms.
my little plants started taking off.
i think small containers dont really lend themselves well,
to having a lot of live biology in the soil.
it might be because of temperature, especially, a small black container in the sun.
certain bacteria and fungi just wont grow at high temps.
just a thought.
i had several plants, so, i put one seedling in the ground last fall.
it wasnt more than 6 inches tall.
we had several nights 28F or under... its perfectly fine.
i was really amazed.
i found this site very helpful
8 Essential Factors for Growing Healthy Lychee Trees
http://www.lycheesonline.com/healthylycheetrees.cfmBest Practices for Growing Lychee Trees
http://www.lycheesonline.com/Growing_Best_Practices.cfmInoculation with Arbuscular Mycorrhizal Fungi Enhances Growth of Litchi Chinensis Sonn. Trees After Propagation by Air-Layering
http://www.lycheesonline.com/inoculation.cfmLychee Tree Root System and Development
http://www.lycheesonline.com/rootsystem.cfm