For plant jars, cycling means letting water, microbes and plants settle before you declare the build hands-off — not a reef-tank nitrogen slogan.
Aim for light morning or evening mist on glass that clears by afternoon, green plants, and no swamp smell.
Constant lid-off “to be safe” desiccates humidity lovers; constant lid-on with a flood creates anaerobic soup. Neither extreme is cycling.
Condensation rules of thumb (for example lower-third mist) vary by room temperature and vessel shape — treat patterns as diagnostics, not laws.
What cycling means here
Let water, microbes and plants settle. Outcome: predictable condensation, living colour, and a forest-floor smell rather than sour swamp.
Day 0–2: seal and observe
Start slightly under-wet rather than flooded. Heavy all-day condensation or constant drip-down means lid off for hours (sometimes up to a day); wipe glass; wait before resealing.
Venting as a tool
Short daily airings during week one (“curing week”) are normal for beginners — for example 30–60 minutes to disrupt stagnant boundary layers and dump excess vapour. The goal is balance, not a permanent half-open climate.
When to add fauna
Many keepers seed springtails at setup so mould films are grazed as they appear. Isopods once litter and humidity look stable. Some add both together — staggered is a refinement, not dogma.
Week 2–4 checks
Remove yellow leaves; confirm no standing water in LECA or the false bottom. Small mould patches: vent, springtails, and remove debris.
Graduation to maintenance
When condensation is predictable and plants push new growth, reduce fiddling. Log what you did — future you will thank present you.
Steps
- Seal slightly dry — Under-water at setup so you can add moisture later rather than remove a flood.
- Read the glass daily — Morning mist that clears is often healthy; opaque all day means vent.
- Add springtails when damp, not flooded — Cleanup crew helps films; it does not fix a swamp.
- Reduce fiddling after a fortnight — Predictable condensation and new growth mean you can step back.
