Species · genus Bisnaga · Cactaceae

Glaucous Barrel Cactus

Ferocactus glaucescens (DC.) Britton & Rose

Growth habit

succulent subshrub

Native range

Mexico Gulf, Mexico Northeast

Reference · F. glaucescens

Cultivars of F. glaucescens

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

No named cultivars catalogued under F. glaucescens 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.

Ferocactus glaucescens is a globe-shaped barrel cactus from the arid limestone country of northeastern and Gulf Mexico, where it stores water in its body and endures long dry spells. Give it gritty, fast-draining mineral mix and the brightest, most direct light you can offer; water deeply only when the mix has gone completely dry, then let it dry out fully again. Err toward drought, since stem firmness recovers but roots left wet will rot.

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 14-28d)
Humidity: ai:claude-opus-4-8
Soil: ai:claude-fable-5
Care: ai:claude-fable-5

Light

Direct sun

Water

≈ every 28 days

Humidity

Low — average room

Temperature

7–32 °C

Soil mix

Very gritty, fast-draining cactus mix

Propagation

Seed, or offsets from clustering plants

Fertilizing

Dilute cactus feed once in early summer

Growth rate

Slow

Flowering

Pale yellow blooms atop the ribs; possible on mature plants

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 14-28d) · ai:claude-fable-5

Kept true by its growers

Every fact here carries its source. Grow Glaucous 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.