Notocactus Scopa Inermis
The Notocactus Scopa Inermis is a rare and fascinating form of the Notocactus Scopa, characterized by the absence of spines or by their very reduced presence. This feature gives it a softer and more ornamental appearance, while retaining the robustness and beauty of its original species.
Its silhouette is globular to slightly cylindrical, generally bright green, with well-defined ribs and small woolly areoles. Where the classic form displays numerous golden spines, the “inermis” cultivar stands out with its bare or weakly spined appearance, highlighting the plant’s natural geometry.
Its growth is relatively slow, making it an ideal species for pot culture or mini dry gardens. When mature, this cactus can produce very pretty golden-yellow flowers in a crown at the top, contrasting beautifully with the absence of spines.
This cactus is a horticultural form selected from the Notocactus Scopa, which originates from the mountainous and sunny regions of southern Brazil, Uruguay and Paraguay.
In nature, it grows on well-exposed slopes in poor but very well-drained rocky soils. The “inermis” cultivar is mainly kept in collections or grown in pots.
In nature, it grows on well-exposed slopes in poor but very well-drained rocky soils. The “inermis” cultivar is mainly kept in collections or grown in pots.
The Notocactus Scopa Inermis needs light to grow healthily, but the absence of spines makes it more sensitive to sunburn.
🌞 Bright indirect light or light sun: Avoid scorching full sun during the hottest hours.
🌤️ Ideal exposure: East- or west-facing window, or lightly shaded greenhouse.
⚠️ Tip: Insufficient light may cause deformation (etiolation) and prevent flowering.
🌞 Bright indirect light or light sun: Avoid scorching full sun during the hottest hours.
🌤️ Ideal exposure: East- or west-facing window, or lightly shaded greenhouse.
⚠️ Tip: Insufficient light may cause deformation (etiolation) and prevent flowering.
Water management must be precise to ensure healthy growth without the risk of rot.
🌱 Spring / summer: Water every 2 to 3 weeks when the substrate is completely dry.
🍂 Autumn / winter: Stop watering and keep the plant cool and dry if possible.
💧 Tip: Use a fine-spout watering can and avoid prolonged contact of water with the base of the plant.
🌱 Spring / summer: Water every 2 to 3 weeks when the substrate is completely dry.
🍂 Autumn / winter: Stop watering and keep the plant cool and dry if possible.
💧 Tip: Use a fine-spout watering can and avoid prolonged contact of water with the base of the plant.
Like all Notocactus, the inermis form enjoys warmth but does not tolerate freezing temperatures.
🌡️ Optimal range: Between 18°C and 26°C during the growing season.
❄️ Minimum temperatures: Tolerates down to 5°C if the substrate is perfectly dry.
🏠 Wintering: Choose a bright, cool, dry location.
🌡️ Optimal range: Between 18°C and 26°C during the growing season.
❄️ Minimum temperatures: Tolerates down to 5°C if the substrate is perfectly dry.
🏠 Wintering: Choose a bright, cool, dry location.
A draining soil is essential for the health of the Notocactus Scopa Inermis.
🌵 Recommended mix: 50% cactus substrate + 50% draining materials (pumice, perlite, sand).
🧱 Tip: Slightly raise the pot or use an unglazed terracotta container to promote evaporation.
🌵 Recommended mix: 50% cactus substrate + 50% draining materials (pumice, perlite, sand).
🧱 Tip: Slightly raise the pot or use an unglazed terracotta container to promote evaporation.
The flowering of the Notocactus Scopa Inermis is spectacular despite the absence of spines.
🌸 Period: From May to August, depending on growing conditions.
🎨 Flowers: Bright yellow, funnel-shaped, up to 4 cm in diameter.
💡 To stimulate: Cool, dry winter rest and maximum light in spring.
🌸 Period: From May to August, depending on growing conditions.
🎨 Flowers: Bright yellow, funnel-shaped, up to 4 cm in diameter.
💡 To stimulate: Cool, dry winter rest and maximum light in spring.
FAQ - Notocactus Scopa Inermis
Can Notocactus Scopa Inermis live indoors all year round?
Yes, provided it receives very intense light, ideally near a south-facing window. In low light conditions, use a suitable grow light.
What is the best substrate for Notocactus Scopa Inermis?
A well-draining mix is essential: half suitable substrate, half mineral materials such as perlite or pozzolana.
Should I fertilize Notocactus Scopa Inermis regularly?
Yes, a monthly application of a suitable liquid fertilizer in spring and summer encourages flowering.
How can I prevent Notocactus Scopa Inermis from rotting?
Ensure the pot is well drained. Add draining granules at the bottom of the pot, and always allow the substrate to dry completely between waterings.
What is the difference between Notocactus Scopa and Scopa Inermis?
The "inermis" form has almost no spines, giving it a softer and more ornamental appearance.
How often should Notocactus Scopa Inermis be watered?
During the growing period, water approximately every 2 to 3 weeks. In winter, stop watering completely.
Why is my Notocactus Scopa Inermis not flowering?
It may have lacked a cool winter rest or sufficient sunlight. You can also support it with a special cactus fertilizer.
Can Notocactus Scopa Inermis tolerate direct full sun?
Yes, but be careful: the absence of spines makes it more vulnerable to sunburn. Prefer filtered light during the hottest hours.
When should Notocactus Scopa Inermis be repotted?
Every 2 or 3 years, preferably in spring. Take the opportunity to renew the cactus substrate.
What is the minimum temperature Notocactus Scopa Inermis can tolerate?
It can occasionally withstand 5°C if completely dry, but it is better to overwinter it between 8 and 12°C in a bright location.
