Source: Wikimedia Commons
Senna meridionalis
BeginnerSenna meridionalis
A caudiciform legume from south-western Madagascar with thick zigzag branches and small pinnate leaves. Even small plants have a swollen base and look like a miniature old tree; the flowers are bright yellow.
About
Senna meridionalis is a deciduous shrub or small tree in the legume family, endemic to southern and south-western Madagascar from Toliara to Itampolo. It grows in arid to semi-arid deciduous forest and thorny scrub on the Eocene limestone of the Mahafaly Plateau, where it is called taraby. Its range is fairly large but fragmented, and the IUCN Red List category is Vulnerable. It forms a shrub 1–2 m tall or a small tree up to 5 m, with a trunk that is swollen and succulent at the base. The stiff twigs zigzag and are divided into long and short shoots bearing small pinnate leaves up to 3 cm long with 3–6 pairs of leaflets. Even small plants look like a miniature tree with their fat, gnarled stems and fine foliage, and young plants are considered the most attractive of the Madagascan Senna species. It is easy to grow and not fussy about light, water or soil, but very slow; in cultivation it eventually reaches 2–3 m, and it can be trained as a bonsai. In Japan seed-grown plants are sold online and by specialist nurseries, and seed is also available.
Size of the Senna meridionalis
The Senna meridionalis grows to 1–5 m tall in the wild; eventually 2–3 m in cultivation.
Basic Info
Origin
Southern and south-western Madagascar (Mahafaly Plateau)
Lifespan
Slow-growing and long-lived (little published data)
Size
1–5 m tall in the wild; eventually 2–3 m in cultivation
Temperature
10〜35℃
Watering & Fertilizer
Light feeding in the growing season
Growing Tips
Light & Placement
A sunny spot keeps the plant compact, although it will grow with less light.
Watering
It takes quite a lot of water in summer; water thoroughly when the free-draining mix dries.
Dormancy Care
It keeps its leaves in winter if watering continues, but it is best to cut water back sharply so it drops its leaves and rests.
Propagation
Propagate from seed or cuttings. The seed coat is hard: pour near-boiling water over the seed, soak 12–24 hours in warm water, and nick the coat if it has not swollen.
Pests & Cautions
A Vulnerable species from Madagascar whose international trade requires permits; choosing seed-grown plants from Japan reduces pressure on wild populations.
Senna meridionalis FAQ
QWhat is the growing difficulty level for Senna meridionalis?
Beginner. A variety suitable for beginners. No special equipment or experience is required—you can grow it without problems by setting up a basic cultivation environment.
QHow large does Senna meridionalis get?
The mature size of Senna meridionalis is 1–5 m tall in the wild; eventually 2–3 m in cultivation. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Senna meridionalis?
Senna meridionalis: watering & fertilizer — Light feeding in the growing season. Aim for appropriate frequency and amount.
QWhat is the typical price for Senna meridionalis?
The price of Senna meridionalis varies significantly by variety, characteristics, size, and lineage. Please check GrowerDirect's price guide for the latest market information.
Last updated: September 23, 2026
References & Sources
Edited & verified by: GrowerDirect Editorial Team
The classifications, regulations, and growing data on this page are created and verified based on the primary information database below.
Taxonomy & Authority
Regulations & Conservation Status
Listed in CITES Appendix II (listed at species level). International trade needs an export permit, but no registration is required for transfers within Japan. The IUCN Red List category is Vulnerable.
Sources: Species+ (CITES): Senna meridionalis / IUCN Red List category via GBIF: Senna meridionalis
Regulations may change. Always verify the latest information with the relevant authorities.
Related Species
Find listings for this species
Related Articles
How to Grow Uncarina | Differences Between the Madagascar Endemic Species Grandidieri and Roeoesliana
An explanation of the appeal and cultivation methods of the Madagascar endemic caudex plant Uncarina genus. We introduce the differences between Uncarina grandidieri and roeoesliana, seedling cultivation, and repotting timing.
Complete Guide to Choosing Caudex Plants as Gifts | Recommended Varieties by Occasion and How to Include Care Notes
A guide to choosing caudex plants as gifts organized by occasion. We introduce how to select varieties based on the recipient's cultivation experience and how to include care notes for long-term enjoyment.
Diagnosing and Treating Poor Root Development in Caudex Plants | Causes and Solutions for Roots That Won't Emerge or Won't Grow
A detailed guide to root emergence problems in caudex plants. From diagnosis methods to solutions, practical techniques for promoting healthy root development are introduced.
Complete Guide to Growing Jatropha podagrica (Buddha's Navel) | Cultivation Management to Enjoy Its Distinctive Caudex and Coral-Red Flowers
Characteristics and cultivation methods of the caudex plant Jatropha podagrica. Detailed explanation of watering management during dormancy, soil, and propagation methods.
🩺 Common diseases
Can't find the plant you're looking for?
Post your wishes for free and growers with matching plants will contact you with introductions.