Water
Water moderately, allowing soil to dry slightly between waterings. Reduce watering in cooler months. Ensure excellent drainage to prevent root rot.
Also known as Giant Protea · King Sugarbush · Mountain Rose
Protea cynaroides, the King Protea, is the largest of the Protea species, native to South Africa, known for its striking, large flower heads.
At-a-glance light, water, soil, and growing conditions from plant data
Requires full sun for best flowering and health.
100% intensity
Protect from intense afternoon sun in hot climates.
Water when top inch of soil is dry, reduce in winter. Ensure excellent drainage.
60% intensity
Requires well-draining, acidic soil. A sandy loam mix with good aeration is ideal. Avoid heavy clay soils.
50% intensity
Prefers mild temperatures between 15-25°C. Protect from frost.
70% intensity
Avoid extreme heat or cold.
Outdoor, Greenhouse
50% intensity
Use low-phosphorus fertilizer sparingly in spring/summer.
20% intensity
Avoid over-fertilization.
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
Water moderately, allowing soil to dry slightly between waterings. Reduce watering in cooler months. Ensure excellent drainage to prevent root rot.
Prune lightly after flowering to shape the plant and remove spent blooms. Avoid cutting back into old wood, as this can stimulate dieback. Focus on maintaining a good structure.
Best propagated from seed sown in autumn or spring, or from semi-hardwood cuttings taken in summer. Seeds require stratification and specific conditions for germination.
Repot young plants annually or biennially in spring. Mature plants in the garden rarely need repotting. Use a well-draining, gritty potting mix and a pot with ample drainage holes.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of King Protea (Protea cynaroides)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| kingdom | Plantae |
| division | Tracheophyta |
| class | Magnoliopsida |
| order | Proteales |
| family | Proteaceae |
| genus | Protea |
| species | Protea cynaroides |
Answers based on plant encyclopedia data