Species · genus Echinocactus · Cactaceae

Candy Barrel Cactus

Echinocactus platyacanthus Link & Otto

Growth habit

succulent subshrub or shrub

Native range

Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southwest

Reference · E. platyacanthus

Cultivars of E. platyacanthus

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

No named cultivars catalogued under E. platyacanthus 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.

A slow-growing barrel cactus from the arid highlands and scrub of central and northern Mexico, built to store water in its ribbed body. Give it the brightest, sunniest spot you can and a gritty, fast-draining mineral mix. Water deeply only once the soil is bone dry all the way through, then let it dry out completely again before the next drink; in cooler, darker months it wants even less.

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 21-45d)
Humidity: ai:claude-opus-4-8
Soil: ai:claude-fable-5
Care: ai:claude-fable-5

Light

Direct sun

Water

≈ every 45 days

Humidity

Low — average room

Temperature

10–30 °C

Soil mix

Very gritty mineral cactus mix with extra pumice or grit

Propagation

From seed; this giant barrel cactus is rarely offset-grown

Fertilizing

Weak cactus feed once or twice in the summer growing season

Growth rate

Slow

Flowering

Yellow crown flowers only on old, large plants; rare indoors

ToxicityAuthoritative · species

Not yet documented

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 21-45d) · ai:claude-fable-5

Kept true by its growers

Every fact here carries its source. Grow Candy Barrel Cactus 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.