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Adenia keramanthus (Adenia keramanthus)

Source: Wikimedia Commons

Adenia keramanthus

Intermediate

Adenia keramanthus

An exceptionally hairy Adenia from Kenya and Tanzania, with trunk and leaves covered in fine grey to rusty-brown hairs. It bears downward-facing, cream, pot-shaped flowers and bright red fruits the size of an egg.

Growing Difficulty
Intermediate
Temperature
10〜35℃
Lifespan
Long-lived (little published data)
Size
50–100 cm tall; caudex about 10 cm thick
Watering
Moderate slow-release feeding in the growing season

About

Adenia keramanthus is a caudiciform in the passion-flower family from south-eastern Kenya and north-eastern Tanzania (around Kilimanjaro and elsewhere) at 0–1,000 m. It grows on dry rocky slopes, in scattered tree grassland, open bushland and dry forest margins, and is reported to be poisonous, so less browsed, and fire-resistant. The knotty caudex, covered in grey bark and fine hairs, reaches about 10 cm thick. From it rise a few succulent stems that grow 50–100 cm tall and branch freely in the upper third. Its covering of fine grey or rusty-brown hairs on trunk and leaves is exceptional in the genus, and rather than climbing it forms a few-stemmed shrub without tendrils. The pale green leaves, felted grey on both sides, are ovate to round and 1.5–15 cm long. The cream, downward-facing flowers are urn-shaped, and the name comes from the Greek for "pot" and "flower". Flowers often appear before the leaves are fully open, and plants can bloom when only 15–20 cm tall. The fruits, about the size of an egg, ripen bright red to crimson. The IUCN Red List category is Least Concern. In Japan imported and seed-grown plants are sold online and through auctions.

Size of the Adenia keramanthus

The Adenia keramanthus grows to 50–100 cm tall; caudex about 10 cm thick.

Basic Info

Origin

South-eastern Kenya and north-eastern Tanzania

Lifespan

Long-lived (little published data)

Size

50–100 cm tall; caudex about 10 cm thick

Temperature

10〜35℃

Watering & Fertilizer

Moderate slow-release feeding in the growing season

Growing Tips

Light & Placement

Grow it in full sun to light shade, avoiding the harshest midsummer sun; indoors give it bright light.

Watering

It photosynthesizes through both leaves and stems, so water evenly in the growing season, though it rots if kept too wet.

Dormancy Care

When the branches die back in winter, stop watering and keep it dry; too much water while leafless causes rot.

Temperature & Overwintering

Keep it above 10°C in winter, ideally around 15°C; it is very prone to rot in cool, wet conditions.

Soil & Repotting

Use a very porous mix with plenty of pumice and perlite and repot every two years. Raising the base a little over several years lets the caudex emerge and swell.

Propagation

Propagate from seed or cuttings; cuttings root easily, but plants grown for their caudex are raised from seed.

Pests & Cautions

Adenia are reported to be highly toxic in all parts: wear gloves when pruning or repotting and keep plants away from children and pets.

CaudexAdeniaEast AfricaPassifloraceae

Adenia keramanthus FAQ

QWhat is the growing difficulty level for Adenia keramanthus?
A

Intermediate. A variety suitable for intermediate growers. Requires some cultivation experience and knowledge of environment management. Pay careful attention to temperature and humidity control.

QHow large does Adenia keramanthus get?
A

The mature size of Adenia keramanthus is 50–100 cm tall; caudex about 10 cm thick. This may vary slightly depending on cultivation environment and individual differences.

QHow should I water and fertilize Adenia keramanthus?
A

Adenia keramanthus: watering & fertilizer — Moderate slow-release feeding in the growing season. Aim for appropriate frequency and amount.

QWhat is the typical price for Adenia keramanthus?
A

The price of Adenia keramanthus 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.

Primary sources

Taxonomy & Authority

Accepted name: Adenia keramanthus Harms

Synonyms: Keramanthus kirkii Hook.fil.

Authority databases: GBIF · GBIF

Nomenclature follows global taxonomic authority databases.

Regulations & Conservation Status

Not CITES-listedIUCN LC · Least Concern

Not listed in CITES (checked on Species+). No special procedure is needed for transfers within Japan.

Sources: Species+ (CITES): Adenia keramanthus / IUCN Red List category via GBIF: Adenia keramanthus

Regulations may change. Always verify the latest information with the relevant authorities.

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