Avicennia matina, the Grey Mangrove, and Aegiceris comiculatum, the River Man grove. The plants grow in river sand in pots lined with plastic. Tiny holes in the plastic provide very slow drainage into a solid outer container, so that the plants never completely dry Out. The plants are fed slow release nutrients via a plastic tube of fertilizer which is pushed into the soil. In the wild, it may be the availability of nutrients which limits the establishment of mangrove plants.
P seem to be the critical ones.
Mangrove plants have very extensive root systems, which can grow up to 30 meters from the base of the tree. What is most remarkable about the plants is their ability to aerate their roots by transferring oxygen internally - there is no free oxygen in the soil, which is permanently waterlogged. The interior of the root system of the grey mangrove is like a series of air filled tubes, connected to the surface by upward growing roots, called pneumatophores. These are a natural adaptation which allow oxygen to enter the gas spaces of the root while the tide is out, but which are waterproof and keep water out when the roots are covered at high tide. The clearing of mangroves worldwide is having significant ecological effects.