Waaikloof Capeblue (Aristea nigrescens) is a striking evergreen perennial with vibrant blue flowers, native to the Cape region of South Africa. It thrives in moist, well-
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
75% intensity
Prefers full sun for best flowering, but tolerates light shade.
Moderate
50% intensity
Keep soil consistently moist during growth, drier in winter.
Sandy, Well-drained
50% intensity
Moderate
50% intensity
Tolerates a range of temperatures but prefers mild conditions. Protect from hard frost.
Outdoor
50% intensity
Low
25% intensity
Feed sparingly during the growing season with a balanced liquid fertilizer.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Aristea nigrescens prefers consistently moist soil during its growing season but requires good drainage to prevent root rot. Water thoroughly when the top few centimeters of soil feel dry.
Reduce watering significantly during its dormant period in winter to allow the soil to dry out slightly between waterings.
Prune Aristea nigrescens after flowering to remove spent flower stalks and any dead or damaged foliage. This helps maintain a tidy appearance and encourages reblooming.
Cut back to the base of the plant if necessary to manage size or shape.
Propagate Aristea nigrescens by dividing established clumps in early spring or autumn. Carefully separate the rhizomes, ensuring each division has roots and a few shoots.
Replant immediately in well-draining soil and water lightly.
Repot Aristea nigrescens every 2-3 years, or when the plant becomes root-bound. Spring is the ideal time for repotting. Use a well-draining potting mix and a slightly larger pot to accommodate root growth.
Ensure the rhizome is at the soil surface.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Where Waaikloof Capeblue (Aristea nigrescens) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Asparagales |
| Family | Iridaceae |
| Genus | Aristea |
| Species | Aristea nigrescens |
Similar in genus Aristea
Answers based on plant encyclopedia data
