












Araceae
Cyrtosperma johnstonii
VAT included · plus
- 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.
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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.
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Interested in Cyrtosperma johnstonii? Worth reading:
Aroids: The Fabulous Arum Family
Mastering Humidity for Healthier Houseplants
Cyrtosperma johnstonii at a glance:
Cyrtosperma johnstonii is the giant swamp aroid for growers who want real scale, dramatic petioles, and a little menace in the silhouette. Long mottled stalks armed with backward-facing prickles carry large arrow-shaped leaves, and in the right warm, wet environment the plant develops into a towering clump rather than a polite potted specimen.
It has the kind of tropical force that works best in greenhouses, paludarium-style setups, and very humid interiors where moisture is not a constant battle. Rich substrate, constant moisture, high humidity, stable heat, bright filtered light, and care while handling the spiny petioles are what turn it from a difficult oddity into a genuinely impressive foliage statement.
Cyrtosperma johnstonii
Quick Care Guide
Light
Bright indirect • approx. 10,000–20,000 lux
Water
Water when ~0–10% dry
Substrate
Moisture-retentive + airy • Steady-moist • Organic-forward • Fine
Temperature
Ideal: 18–28 °C • Avoid below: 16 °C
Humidity
Humid 60–80 % +
Growth habit
upright rhizomatous geophyte herb
Support
not needed
Growth speed
High
Max size indoors
Max. height: 300 cm • Max. spread: 150 cm
Toxicity & safety
Toxic
Origin & habitat
Solomon Islands; wet tropical habitat
How to read these metrics
These metrics are standardised reference points. We compile them by reviewing and cross-checking multiple botanical and horticultural references, then refining them through real-world growing experience. Source links: Plant Care Resources.
Please use the values as guidance. Conditions vary by home, so the same plant can respond differently. For plant-specific context, read the full product description and browse our Plant Care Guides.
- Light: level + approximate lux at leaf level;
- Watering: “% dry” is the trigger before watering again; lower % stays more evenly moist.
- Potting mix: one-line profile (structure/drainage • moisture buffer • base • particle size).
- Temperature: “Ideal” comfort range; “Avoid below” marks higher stress risk.
- Humidity: target bands (Normal/Moist/Humid); consistency usually matters most.
- Growth habit: growth form (rosette, trailing, climbing) for placement and training.
- Support: needed/optional/none, whether stake, pole, or trellis improves structure and size.
- Growth speed: fast/average/slow under decent indoor conditions—expectations, not a promise.
- Max size indoors: realistic long-term potential; format differs for climbers vs. trailers.
- Toxicity & safety: chemical irritants/toxicity and physical hazards (spines, bristles).
- Origin & habitat: native region + typical biome/habitat as context.
Can Cyrtosperma johnstonii be grown outdoors in European climates?
Indoors onlyMore outdoor growing details
Do not leave outside below
16°C
This plant is best kept indoors and should not be treated as an outdoor plant in European climates.
Plant Care Basics:
- 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.
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.
