Species · genus Cereus · Cactaceae
Hedge Cactus
Cereus hildmannianus K.Schum.
Also known as: Queen-of-the-night · Andes Organ Pipe Cactus
Cultivars of C. hildmannianus
The named forms growers keep — each with its own page, each honest about how much we know.
No named cultivars catalogued under C. hildmannianus 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 columnar night bloomer
Cereus hildmannianus is a succulent tree in the cactus family, one of the large columnar cacti grown for their architectural stems and their rare, dramatic flowers. It is accepted as a distinct species with two recognised subspecies.
Source: Kew
South American roots
This species is native to Bolivia, Brazil, and northern Argentina, where it grows as a succulent tree in seasonally dry tropical country. It has since been introduced well beyond that range, turning up from the Canary Islands and Spain to India, Vietnam, and Hawaii.
Source: Kew
Dry soil, bright light
This is a plant of arid habits: it wants sandy, sharply draining cactus mix and a thorough soak followed by a complete dry-out before watering again, rather than a steady trickle of moisture. Bright conditions suit it, though some partial shade through the hottest part of the day helps it avoid sunburn, and a cactus fertiliser applied roughly every ten days through the growing season supports steady growth. Self-watering devices are best avoided altogether, as this cactus is built for dry spells rather than constant moisture.
Source: Epic Gardening
Rooting a cutting
Propagation is straightforward from a cutting: a leaf or section taken from a mature plant can be set into sandy soil, kept on a warm windowsill or outdoors in mild weather, and left to root with only light watering. It helps to wait until the plant is a few years old before taking cuttings, and to take only a small piece at a time so the parent plant is not set back. Naturally shed sections will also root themselves where they fall, which is simply how the plant spreads over time.
Source: Epic Gardening
Ribbed stems, night flowers
The genus Cereus gathers around thirty-three large columnar cacti from South America, with ribbed, spiny stems. Their flowers are large and funnel-shaped, opening at night and usually white, though pink, purple, yellow, green, or occasionally cream forms occur.
Source: RHS
Reading the leaves
A leaf or stem section that browns and breaks in half is usually a sign of too much water, too much sun, or a mix of heavy rain followed by strong sun scorching the tissue. Reddish colouring on the stems likewise points to too much direct sunlight. Slow growth or a long refusal to flower after four or five years is generally a signal that light, water, fertiliser, or soil conditions are not quite right.
Source: Epic Gardening
Repot to let it grow
Because this cactus grows slowly and needs room to mature before it flowers, it benefits from being moved into a larger pot from time to time rather than left to stay small. Pruning is not routinely needed and is best kept minimal, mainly for taking cuttings, since removing large sections can stress the plant and interrupt its flowering cycle.
Source: Epic Gardening
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
Direct sun
≈ every 28 days
Low — average room
10–32 °C
Gritty, fast-draining cactus and succulent mix
Stem cuttings callused then rooted in dry mix
Dilute cactus feed once or twice in summer
Moderate
Large night-blooming white flowers on mature plants
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.
PrimarySources: 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 Hedge Cactus yourself? What you’ve observed — how it drinks, how it holds its color, a name that’s off — and a clear photo of your plant are exactly what keep this page honest. Contributions are reviewed before anything changes.
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