King Protea, Giant Protea
Protea cynaroides, commonly known as the King Protea, features flowers with deep crimson bracts and a cream-coloured centre from autumn through until spring. It grows as a woody shrub to about 1.2 m tall and 1.5 m wide. Protea cynaroides is a versatile plant that is often included in a mixed planting, added to a coastal planting, planted around the pool area, or grown anywhere the beauty of the large flowers can be enjoyed.
Suited to regions: | All regions |
Plant type: | Shrubs |
Height: | 1.20 m |
Spread: | 1.50 m |
Flowering time: | Spring, Autumn, Winter |
Tolerances: | Coastal, Extended dry periods, Hardy |
Garden uses: | Containers, Living areas, Pool areas |
Garden styles: | Alpine, Backyard, City & Courtyard, Coastal, Frontyard, Mediterranean, Modern |
Easy to grow? | Yes |
Maintenance requirements | Low |
Growth rate | Medium |
Also known as | King Protea, Giant Protea |
Protea cynaroides, commonly known as the King Protea, typically flowers from late winter through to late summer, with peak blooming often occurring between spring and early summer. In New Zealand conditions, this generally means August to February, although exact timing can vary depending on the local climate and growing conditions. The flowering period can be extended in warmer regions or when plants are well cared for. Each flower head is large, striking, and long-lasting, making it a standout feature in gardens and a popular choice for cut flower arrangements.
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Protea cynaroides, or King Protea, typically grows to about 1 to 1.5 metres tall, though in ideal conditions it can reach up to 2 metres. It forms a low, rounded shrub with a similar spread.
Protea cynaroides is not considered edible and is generally grown for ornamental purposes rather than consumption. While it is not classified as toxic, there is no known culinary use for its flowers, leaves, or other parts. It's best enjoyed for its striking appearance in gardens and floral arrangements rather than as a food source.
Growing Protea cynaroides (King Protea) successfully requires the right conditions and a bit of care, but the stunning flowers are well worth the effort. This plant thrives in well-drained, acidic soil with low fertility. A sunny, open location is essential, as Proteas need at least six hours of sunlight per day. They are drought-tolerant once established, so water young plants regularly until they develop strong roots, then reduce watering to avoid overwatering, which can lead to root rot. When planting, avoid using fertilisers high in phosphorus, as Proteas are sensitive to it. A light mulch of bark or gravel can help retain moisture without affecting the soil pH. Prune lightly after flowering to maintain shape and encourage bushiness, but avoid heavy cutting into old wood. In colder areas, consider planting in a raised bed or container that can be moved to a sheltered spot during frosts. With the right care, Protea cynaroides can thrive and produce its iconic, show-stopping blooms for many years.
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