Species · genus Cycas · Cycadaceae

Sago Palm

Cycas revoluta Thunb.

Also known as: Fern Palm · Sago Cycas · Sotesu-nut · Japanese Sago Palm · King Sago

Growth habit

shrub

Native range

China Southeast, Japan, Nansei-shoto, Taiwan

Reference · C. revoluta

Cultivars of C. revoluta

The named forms growers keep — each with its own page, each honest about how much we know.

No named cultivars catalogued under C. revoluta yet. When growers document a stable, named form, it earns its own page here.

Guide

The species-level account. Cultivar pages build on this and say where they differ.

Cycas revoluta is a slow-growing cycad from subtropical China, Japan, and Taiwan, forming a stout water-storing trunk topped with stiff, palm-like fronds. It wants bright indirect light and gritty, fast-draining mix, and it rots readily if kept wet, so let the top inch or two of soil dry fully before watering again.

Care recipe

The species record — the baseline every cultivar inherits unless it says otherwise.

Care notes are early — not yet verified

Light: ai:claude-opus-4-8
Water: ai:claude-opus-4-8 (range 10-21d)
Humidity: ai:claude-opus-4-8
Soil: ai:claude-fable-5
Care: ai:claude-fable-5

Light

Bright, indirect

Water

≈ every 21 days

Humidity

Medium

Temperature

15–27 °C

Soil mix

Well-draining, sandy mix with some grit

Propagation

Offset pups removed from the base, or seed (very slow)

Fertilizing

Dilute balanced feed once or twice in the growing season

Growth rate

Slow

Flowering

Rarely flowers indoors; a slow, ancient cycad

ToxicityAuthoritative · species

Toxic to cats & dogs & humans

Cycadaceae contain cycasin and related toxins; all parts, especially the seeds, are dangerous if ingested. This is where toxicity lives: every cultivar of this species inherits it and none can override it.

Reference images

Every image credited. Licenses link to their deeds.

No reference gallery yet

A few clear photos — habit, a mature leaf, a flower if it blooms — would give this page its eyes.

Add images

Sources: ai:claude-opus-4-8 · ai:claude-opus-4-8 (range 10-21d) · ai:claude-fable-5 · ai:claude-opus-4-8 (family inference)

Kept true by its growers

Every fact here carries its source. Grow Sago Palm yourself? What you’ve observed — how it drinks, how it holds its color, a name that’s off — is exactly what keeps this page honest. Contributions are reviewed before anything changes.