The magical miniature worlds of terrariums

Choose plants adapted to low light and high humidity. Think "lower stories of tropical rainforests," says Wong. Some aquarium plants also work. Avoid cacti and succulents suited to bright, arid conditions.

Pick the right substrate. "My number one tip is not to use compost," says Wong. It fosters mould. Instead, try a mineral-based substrate such as kurodama soil, used for bonsai.

Cover your soil with moss. It creates the illusion of a forest floor. "I've researched all the different species, there's only one that's easily accessible and very reliable. It's called Leucobryum glaucum, sold by florists as ‘bun moss’."

Add a grow lamp. Not essential, but it helps in low light. Try a desk lamp with a daylight bulb, and an artificial timer for "dawn" and "dusk".

Avoid overplanting. "There is only so much soil, water, room to grow – so overcrowding with too many plants can be a pitfall," says Terrell. "Try using decorative materials to fill space instead: natural bark, driftwood, stones, mosses, figurines."

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