I am going to make a classic (landscape) terrarium with an old 20-something gallon tank that I have. The plants will all be in the same medium. I plan on using a standard medium of 50/50 sand and peat layered over a couple inches of pebbles and horticultural charcoal for drainage. The tank will have several small holes in the bottom and it will sit in a large bin. When water collects, it will be poured out. The tank will sit under some very high quality and high intensity grow tubes. I forgot the specs/model, but they were strong enough to burn and kill a vining N. ampuillaria I had a while ago My mexican pings seen to like growing about 10 inches away from it. The plants in the terrarium will sit a bit closer to the lights (8 or 9 inches away). There will be no lid over the tank to avoid fungus issues. Because of this, the tank will have low humidity. Day temps will be 80-85 in the summer and 70-75 in the winter. Night temps will be around 70 in the summer and around 60 in the winter.
These are the plants I plan on growing in the terrarium
D. obovata "ivan's paddle"
D. capillaris x rotundifolia "evergrow"
D. capensis "red"
D. anglica hawaii
P. planifolia (in a small flooded area)
divisions of my various mexi-pings that don't need dormancy
N. gymnamphora seedling (in a burried pot or nepenthes medium)
N. x Judith Finn seedling (in a buried pot of nepenthes medium)
The neps will be moved when they grow too big.
Are all of these plants suited to a classic terrarium? Can they take low humidity (the tank will be open topped)? I am planting some weedy species becaue I don't mind them. I will make sure no plants outcompete others, though.
Any suggestions or criticism is appreciated.