Senecio mandraliscae, nicknamed Blue Chalksticks, is a standout succulent that’s as hardy as it is handsome and from South Africa’s sun-drenched landscapes. Let’s guide you through everything about this easy-care beauty.
Description and Origins
This is a spreading succulent—also known under synonyms like Curio talinoides var. mandraliscae—it sports elongated, pencil‑shaped, blue‑grey leaves coated in a fine waxy farina that gives it that chalky bloom. Native to South Africa, and common in the Eastern Cape region. It easily spreads to form a dense mat about 30–60 cm across and up to around 30 cm tall.
Difference: Senecio mandraliscae vs Senecio repens
It is a little difficult to see the difference, and often these two species are confused. However here is our interpretaion of the difference in our growing conditions.
- Senecio mandraliscae (Blue Chalksticks): Taller, vigorous, narrow and elongated pointed leaves, forming a striking architectural form More of a Blue Grey colour which tends to enphasise a blue colour a little more.
- Senecio repens (Curio repens): Lower-growing, mat-forming groundcover with shorter, broader, boat‑shaped leaves; more compact and delicate. A Blue green colour
GROWING CONDITIONS and Basic Care
Blue Chalk Sticks will grow in part shade, however it is best planted in full sun for more compact growth and better foliage color.
- Natural Habitat
Rocky, sun-exposed terrains of South Afric - Soil/Potting Mix
Fast-draining cactus or succulent mix, ideally with coarse sand/perlite/grit. - Sun/Light
Tolerant of part shade to full sun, Full sun yields best colors; tolerates light shade however growth can be sparse and colours not as intense. - Temperature
Prefers warm; not frost-hardy—below ~5 °C (41 °F) can cause damage - Climate Zones
USA Zones 10–12; UK in mild sheltered spots; Australia in Mediterranean-style regions like parts of Victoria - Height
6 to 18 inches (15 to 45 cm) - Fertiliser
Balanced, diluted liquid fertilizer in spring/summer—once a month or 3–4 times total in growing period
PRUNING
Tidy or shape in late winter/early spring to control form and encourage fuller habit.
PROPAGATION
- Stem cuttings: The Easiest method, take cuttings 4 – 6 inches long, allow to callus for a few days, then plant in dry, well‑draining substrate
- Leaf propagation: Selecect va leaf with some stem, insert into slightly moist soil; new growth emerges in weeks
Summary Details
- Plant Type
Evergreen succulent, groundcover - Growth Habit
Spreading mat with upright-then-spreading stems - Height
Up to 45 cm - Width
~30–60 cm spread - Time to Height
2–3 years - Light
Full sun best for color - Climate Zone
USA Zones 10–12; mild UK; Australia (temperate, Mediterranean) - Plant Usage
Groundcover, border, container - Environment
Sunny-rocky, well-drained soils - Frost Tolerance
Low; sensitive below ~5 °C - Drought Tolerance
High - Special Features
Blue-grey chalky leaves, architectural look - Soil Type
Sandy, gritty, well-draining - Soil Moisture
Dry between waterings - pH Level
Acid to alkaline. - Attracts Wildlife
Insignificant. - Flower Colour
White, inconspicuous. - Flowering Time
Summer (occasionally) - Foliage Type
Succulent, cylindrical leaves - Foliage Colour
Silvery-blue / blue-green - Autumn Colour
Evergreen - Lifespan
Perennial, long-lived if cared for