Safety note: This plant may be toxic to humans and pets. See toxicity details.
Stem agapanthus (Agapanthus caulescens) is a striking perennial with upright stems topped by clusters of blue to violet-blue flowers, native to South Africa.
At-a-glance light, water, soil, and growing conditions from plant data
High
75% intensity
Prefers full sun for best flowering, but tolerates partial shade.
Moderate
50% intensity
Allow soil to dry slightly between waterings during the growing season; reduce in winter.
Well-drained soil
50% intensity
Moderate
50% intensity
Prefers temperatures between 15-24°C during the growing season; cooler in winter.
Outdoor
50% intensity
Moderate
50% intensity
Feed with a balanced fertilizer during the growing season.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | Yes 2/5 intensity |
| Toxic for pets | Yes 2/5 intensity |
| Edible | No |
All parts of the plant are toxic if ingested.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water Agapanthus caulescens regularly during the growing season, ensuring the soil dries slightly between waterings. Reduce watering significantly in winter, allowing the soil to remain drier to prevent root rot.
Consistent moisture is key for vigorous growth and flowering.
Prune Agapanthus caulescens after flowering by cutting back the spent flower stalks at their base. This tidies the plant and prevents seed formation, which can divert energy.
Remove any dead or damaged foliage at any time of year.
Propagate Agapanthus caulescens by division of established clumps in early spring. Carefully separate the root ball into sections, each with healthy roots and shoots.
Replant divisions immediately into well-draining soil.
Repot Agapanthus caulescens when it becomes root-bound, typically every 2-3 years. This is best done in early spring before new growth begins.
Choose a pot that is only slightly larger than the current one to avoid overwatering issues.
Identify plants like this with ePlant AI
Snap a photo to get care tips and match similar species on the go.
Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Stem Agapanthus (Agapanthus caulescens)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Asparagales |
| Family | Amaryllidaceae |
| Genus | Agapanthus |
| Species | Agapanthus caulescens |
Similar in genus Agapanthus
Answers based on plant encyclopedia data
