I've got 4 Mangrove tree seedlings at a blowout sale at my aunt's Bachmanns flower shop growing in a 4" undrained pot of aquarium gravel and they should really be moved to a nice big new container (they're almost 2 ft tall) but I'm curious about several things. I'm hoping someone else has some and can answer me these questions:
1) Do they need to be potted in seawater (or at least calcified water) for longterm health? I can pre-treat my RO water if need be.
2) Is aquarium gravel really the best "soil" for them"?
3) Should they be waterlogged continually or should I let the water level drop (for the last couple months I've been letting it rise and fall). Is there a level on the stem I should keep the water filled to?
4) How much fertilizer would a mangrove like to have? So far I've been fertilizing with orchid fertilizer about twice a month at half strength but some plants like more.
If any of you grow these I'd like to hear from you! *