Light
Full sun / direct • approx. 40,000–80,000 lux
Buy 4 plants, get 1 free
Cactaceae
Cereus forbesii
- Curated selection:
Every plant is hand‑picked for health and visual appeal, so you receive a strong, well‑established plant.
- Representative photos:
Product images show a typical plant of this variety. Natural differences in leaf number, shape or variegation are normal, your plant will still match in type and quality.
- Size details:
Listed sizes refer to pot diameter (cm) and approximate overall height (cm) from the base of the pot to the tallest leaf or stem.
- “Get What You See” items:
If you are buying the exact plant shown in the photos, this is clearly stated in the size section.
- Individual photos:
One‑off photos are only provided when this is explicitly mentioned in the size section. - For special traits or small quirks, please check the full product description.
VAT included · plus
Your new plant has just travelled a long way and needs a calm start in its new home. For step-by-step unboxing and first-week care, check our after-delivery care guide. For deeper tips on how your plant settles in over the next weeks, read our houseplant acclimatization guide.
- Care basics , Main hub with links to all houseplant care guides.
- After delivery & first week , Unpacking, first placement, and early recovery.
- Light, How much light houseplants really need indoors.
- Watering , When to water and how to avoid root rot.
- Substrates & roots, Potting mixes and drainage for strong root systems.
- Humidity, When humidity matters and what actually helps.
- Fertilizing, Simple feeding routine without burning roots.
- Problems & pests, Yellow leaves, brown tips, bugs, and fixes that work.
- Semi-hydro, How to run low-maintenance mineral substrates.
Secure shipping, carefully packed orders with safe delivery across the EU, UK and Switzerland.
28-day plant guarantee, if a plant arrives damaged or fails soon after delivery, we help you make it right.
Free returns, simple, cost-free returns according to our policy.
For full details, please see:
Please head to our FAQ Page or Contact us.
Cereus forbesii
Quick Care Guide
Watering
Water when ~90–100% dry
Substrate
Gritty • Ultra fast-draining • Mineral-heavy • Fine-medium
Temperature
Ideal: 15–27 °C • Avoid below: 10 °C
Humidity
Normal 40–50 %
Growth habit
Upright columnar succulent cactus.
Support
not needed
Growth speed
High
Max size indoors
Max. height: 180 cm • Max. spread: 60 cm
Toxicity & safety
Non-toxic; physical injury risk
Origin & habitat
Native from Bolivia to north-central Argentina
Outdoor growing
Outside from 12 °C · sheltered spot
How to read these values
These care values are quick reference points for indoor growing. Use them as a guide, then adjust for pot size, substrate, temperature and how quickly the substrate dries.
For more detail, read the full product description or visit our Plant Care Guides.
- Light: level and approximate lux at leaf level.
- Watering: “% dry” shows how far the substrate should dry before watering again.
- Substrate: structure, drainage, moisture retention, base material and particle size.
- Temperature: “Ideal” shows the preferred range; “Avoid below” marks the cold-stress threshold.
- Humidity: target range; steady conditions usually matter more than exact numbers.
- Growth habit: how the plant grows, such as upright, climbing, trailing, clumping or rosette-forming.
- Support: whether a stake, pole or trellis is needed, optional or unnecessary.
- Growth speed: expected pace under suitable indoor conditions; use as a guide, not a promise.
- Max size indoors: realistic long-term indoor size under good conditions.
- Toxicity & safety: irritation, toxicity or physical hazards such as spines or bristles.
- Origin & habitat: native range, hybrid background or typical habitat where relevant.
- Outdoor growing: when a potted indoor plant can be placed outside and what outdoor protection it needs.
Cereus forbesii – Hardy Blue-Green Columnar Cactus
Cereus forbesii is a robust, columnar cactus species native to arid zones in Argentina and Bolivia. Known for its striking blue-green stems and sculptural form, this species is valued by collectors and cactus lovers for both its natural form and its spectacular cultivars. Depending on the variant, Cereus forbesii can grow upright with a slightly wavy profile or develop twisting, contorted growth patterns in monstrose forms. Its adaptability, fast growth, and drought tolerance make it a strong candidate for both indoor and outdoor collections in warmer climates.
Highlights and Visual Features
- Stem Color: Young stems are glaucous blue, maturing to grey-green or olive
- Ribbing: 4 – 7 well-defined ribs with distinct areoles and evenly spaced spines
- Size: Can grow up to 2 – 7 meters in ideal outdoor conditions; shorter in containers
- Flowers: Large funnel-shaped blooms, white to reddish, opening at night
- Fruits: Red fruits with bluish bloom, containing lilac pulp and black seeds
Native Environment and Botanical Background
In its natural habitat, Cereus forbesii thrives in semi-arid lowlands and high desert regions, where it grows upright or in candelabra-like clumps. The species tolerates extreme temperature shifts and intense sun, with roots anchored in mineral-rich, sandy soils. It is found at elevations from 500 to 1,500 meters and endures prolonged dry periods thanks to its thick water-storing tissues.
- Origin: Northern Argentina and Bolivia
- Growth Rate: Moderate to fast in warm, dry conditions with ample sun
- Growth Type: Upright, multi-stemmed cactus with occasional basal branching
- Toxicity: Non-toxic but spiny; handle with care
How to Grow Cereus forbesii
- Light: Needs full sun or very bright indoor light to maintain shape and color
- Watering: Let the soil dry completely between waterings; avoid wet feet
- Humidity: Prefers dry air; does not tolerate excess moisture or condensation
- Temperature: Thrives in 20 – 30 °C; protect from frost or cold drafts under 10 °C
- Soil: Use cactus-specific mix or a well-draining blend of sand, gravel, and mineral substrate
- Repotting: Every 2 – 3 years; increase pot size gradually for stability
- Fertilizing: Apply a cactus fertilizer monthly in the growing season (spring to summer)
- Propagation: Can be grown from seeds or stem cuttings left to callus before planting
- Pruning: Rarely needed except to remove damaged segments or control size
Troubleshooting and Tips
- Wrinkling: A sign of underwatering; give a deep soak and monitor recovery
- Root Rot: Caused by soggy soil; always use fast-draining substrate
- Pests: May attract mealybugs or spider mites in poor air circulation; remove pests with soft brush or insecticidal soap
Extra Growing Info
This species includes several well-known cultivars. The spiral-growing form, often called 'Spiralis', develops a striking helical shape and grows rapidly under good light. The 'Ming Thing' monstrose variant has dense, compact, knobby growth with sculptural blue-green mounds. Both cultivars arise from natural mutations of Cereus forbesii and are sought after for their unique architecture and minimal care needs.
Name Origins and Classification
The genus name “Cereus” means “torch” in Latin, a reference to its tall columnar form. The species name “forbesii” likely honors a historical plant collector or explorer with the surname Forbes. The species was officially described in 1846 by C.F. Förster in his early cactus taxonomy work.
Plant names, growth habits, natural habitats and indoor care guidance are checked against trusted botanical, habitat and horticultural references before publication.View our plant care resources and references.
FAQs about Cereus forbesii
Recently viewed:
Sign up for Foliage Factory newsletter for early access to new arrivals and practical care tips that work in real homes.