On a rainy Sunday I turned a pasta jar into a tiny forest. Not a forest, exactly — a desert, under glass. A succulent terrarium is the easiest impressive plant project there is, because the plants want neglect and the jar does half the work.

What you need

  • A clear glass container with a lid or narrow neck (a big jam jar, a vase, anything)
  • A handful of gritty cactus soil — or make the gritty recipe if you have pumice
  • 2–3 small succulents that stay tiny: Haworthia, a small Echeveria, or Lithops
  • Horticultural grit or small pebbles for drainage
  • Optional: a twig, a rock, a bit of driftwood for looks

That is it. No grow light, no pump, no power.

Prep (5 minutes)

Wash and dry the jar. The single biggest failure is trapped moisture, so everything going in should be bone dry. Tip: bake the soil mix at 90°C for 10 minutes to kill any fungus gnat eggs — I learned this after my first pretty jar hatched flies in week two.

Lay a 2–3 cm layer of grit or pebbles at the bottom. This is your fake "drainage" so the soil above never sits in a puddle.

Build it, step by step

  1. Add soil on top of the grit, mounded slightly higher at the back so it looks like a little landscape.
  2. Dig small holes with a finger or a stick and settle each plant's roots in. Space them so they are not touching — crowding invites rot.
  3. Tuck grit around the bases so no soil is piled against a stem. Succulent stems rot where soil touches and stays wet.
  4. Add the decoration — a rock, a twig — after the plants, not before, so you do not bury them.
  5. Do not water yet. Leave the lid off for a day so any trapped humidity escapes.

Aftercare (what to do in week one)

Water once, lightly, at the soil — about a tablespoon for a jam-jar size — then put the lid on loosely, not sealed. A succulent terrarium wants a little air, not a sealed swamp. After that, ignore it. Mine gets a splash of water every 3–5 weeks in summer, every 6–8 weeks in winter.

If condensation fogs the glass for more than a day, take the lid off for a few hours. Constant fog means too wet.

The charm of a succulent terrarium is that it looks like a finished thing but asks almost nothing of you. Build it, water it once, and put it somewhere you will see it — not somewhere you will fuss over it. If you enjoy this, the kokedama ball is the next project that costs about the same and takes the same hour.