What is an artillery plant?
The artillery plant (Pilea microphylla) is a small, bushy perennial native to tropical regions of the Americas, grown indoors for its unusually delicate, moss-like foliage. Each stem is packed with tiny, bright-green leaves just 2–6 mm long, giving the plant an almost lacy, fern-like texture. It belongs to the nettle family (Urticaceae) — not a true fern at all — and is closely related to the popular aluminum plant (Pilea cadierei) and Chinese money plant (Pilea peperomioides).
Its memorable common name comes from the male flowers, which pop open when ripe and catapult pollen outward in a visible little burst. Indoors the flowers are inconspicuous (greenish-white, clustered in the leaf axils), but the pollen-launching mechanism is real and occasionally visible as a faint puff on warm days.
How much light does an artillery plant need?
Artillery plants thrive in bright, indirect light — think a few feet back from a sunny east- or west-facing window, or behind a sheer curtain on a south-facing one. In good light the stems stay compact and the foliage is dense. In medium light the plant survives but stretches noticeably, with longer internodes and a looser habit. Direct afternoon sun scorches the small, thin leaves quickly, so keep it off the glass.
How often should you water an artillery plant?
Water about every 1–2 weeks, letting the top inch of soil dry out between sessions. Unlike many succulents, the artillery plant prefers to stay on the slightly moist side rather than going fully dry — its tiny leaves lose moisture quickly. That said, it cannot sit in waterlogged soil: use a well-draining potting mix and a pot with a drainage hole, and tip out any water that pools in the saucer after 30 minutes.
Does an artillery plant need high humidity?
Yes — this is a tropical plant that appreciates humidity above 50%. In typical indoor air (especially in winter with the heating on) the leaf tips can brown and the plant looks stressed. Good humidity strategies include grouping it with other plants, setting it on a pebble tray filled with water, or running a small humidifier nearby. Regular misting also helps but is less effective than raising ambient humidity. A bathroom or kitchen windowsill often provides naturally higher moisture.
How do you keep an artillery plant bushy?
The artillery plant grows fast and can become leggy and open without pruning. Pinch back the growing tips every few weeks — just nip off the last centimetre or two of each stem with your fingers. This signals the plant to branch from lower nodes, producing a fuller, denser mound. If a plant has already become sprawling, cut it back hard (by up to half) in spring and it will regenerate quickly with compact new growth.
Is an artillery plant safe for pets?
Yes — the ASPCA lists Pilea microphylla as non-toxic to cats and dogs, making it a good choice for pet-friendly households. It is one of the genuinely safe options in a family of plants that is largely non-harmful to animals.