Planted an 18x18x24 six weeks ago with a pothos cutting, two small ferns, a bromeliad and some moss on the background. Everything is alive and nothing has died, but it looks exactly like it did on day one. The pothos has put out one leaf. I know I am impatient and I would like a realistic expectation so I stop poking at it and worrying that something is wrong.
Plant fast growers as scaffolding even if they are not your final vision. Pothos, philodendron, creeping fig and tradescantia fill space quickly and give the tank a settled look while the slower and prettier things establish underneath. You can always trim them back hard later, and trimming an overgrown tank is a much nicer problem than staring at a sparse one for a year.
Creeping fig will take over completely given a year, so plant it knowing you are signing up for regular trimming. That is a fine trade for a tank that looks alive in three months rather than twelve.
One thing that quietly slows everything down: nutrients. A brand new coco and sphagnum substrate is close to inert. Once the cleanup crew and some leaf litter have been breaking down for a few months, growth picks up noticeably by itself. Until then a very dilute foliar feed every few weeks helps, as long as you keep it weak enough to be safe for whatever will eventually live in there.
On the moss specifically, set your expectations lower. Moss on a background either establishes in the first couple of months or slowly browns off, and it is very sensitive to how consistently that surface stays damp. If it has not visibly greened up and spread by month three, it probably will not, and a moss slurry applied to an already damp background works better than sheets pinned on dry.
Take a photo from the same spot on the same day each month. Growth at this stage is invisible day to day and obvious across four photos. It is the only reliable cure for the feeling that nothing is happening.
@wind_down_wren · last mo. · 4 replies
Six weeks is nothing and one new pothos leaf is a good sign, not a bad one.
Realistic timeline for a tank like yours:
The single biggest lever on that timeline is light. Most tanks that look sparse at six months are underlit rather than badly planted. A screen top plus a small bulb is not much light by the time it reaches the substrate. A decent LED bar across the top, run 10 to 12 hours, changes the growth rate dramatically and costs less than replacing plants you assumed were failing.
Second biggest lever is planting density at setup. Nurseries and photographers plant heavily. Five plants in an 18x18x24 will take a year, fifteen will take four months.
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@sashiko_sam · last mo.
The light point cannot be overstated. I doubled the light over a tank that had sulked for eight months and it filled in over the following ten weeks with no other changes. I had spent that time blaming substrate and humidity.
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@grit_greta · last mo.
On density, cuttings are the cheap way to get there. Half a dozen pothos cuttings from one plant cost nothing and will root straight into the background. There is no reason to plant sparsely when the plants are free.
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@gainstage_gil · last mo.
And stop poking, genuinely. Every time you lift a plant to check the roots you set it back. Six weeks of leaving it completely alone will do more than anything you can actively do.
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