The tree will die in excessively wet soil for long time so the soil should be sandy. Lychee Tree Care. The season is upon us for harvesting the fruit of the Lychee tree.Despite the fruits addictive flavor, it remains one of China’s best kept secrets.Lychees have a rough outer skin that separates easily leaving you with a flesh that is sweet to sub-acid, aromatic and tastes unlike anything else on earth. Although grown commercially for its fruit, in landscape use it is often used as a shade tree or a specimen fruit tree. The lychee bears small, dimpled fleshy fruit with a light, perfume-like flavor. Germinated Lychee Seeds: Soil For Lychee Tree. Give the tree regular watering and fertilize twice a year with an organic fertilizer. The lychee tree needs a free-draining, nutrition rich slightly acidic soil (pH of 6.5). As mentioned, lychee trees need to be protected from wind. Lychee Tree Care. Planting and Caring Tips for Your Lychee Tree June 7, 2011. Add coarse river sand or perlite in the soil if it is clay. While the trees will tolerate slightly water logged soil and light flooding for short periods, continual standing water is a no-no. Proper pruning will also mitigate wind damage. Lychee is a tropical broadleaf evergreen tree native to China, where it grows in a warm, wet climate.