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King Protea
Protea cynaroides · Proteaceae
📷 © Pierre André · CC BY-SA 4.0
The gardener's calendar
Ideal time to plant king protea: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- King Protea
- Foliage
- Evergreen
- Flowering
- Autumn and winter (September to February)
- Adult size
- 1 to 2 m in height
- Hardiness
- Mild climate (minimum 5 to 8 °C)
- Origin
- South Africa, Western Cape
- Growth
- Slow to moderate
- Soil type
- Well-drained, poor, slightly acidic
Expert tips
The key tip
Arrose modérément en croissance, puis réduis drastiquement en hiver—elle craint l'excès d'eau plus que la sécheresse. Veille à un drainage parfait (substrat sableux, pot percé) et laisse sécher entre les arrosages. Fertilise très léger (moitié dose) car elle fixe mal les nutriments et accumule les sels.
The common mistake
La plupart des jardiniers noient la Protea en pensant bien faire : elle meurt d'arrosage excessif, surtout en pot, bien avant de manquer d'eau.
The pro's trick
Rempote tous les 2-3 ans sans attendre : le substrat se compacte, retient l'humidité et tue la plante. Mélange sable grossier, écorce de pin et perlite (1/3 chacun) pour du drainage maximal.
Seasonal watch
Fin d'automne et hiver : réduis l'eau de moitié même si le sol paraît sec en surface. Le froid ralentit l'évaporation, le pot reste humide plus longtemps—c'est quand elle pourrit le plus, surtout en zone tempérée.
Care
Light and exposure
Place your protea in a very sunny location—it needs at least 6 hours of direct sunlight daily. In Mediterranean or mild temperate climates, position it facing south or southwest. Good light promotes abundant flowering and keeps the plant nicely compact.
Watering
Water moderately, especially during the growing season (spring-summer). Let the substrate dry out slightly between waterings, as this plant hates waterlogging. Reduce watering in winter. Never create soggy conditions, which lead to root rot.
Soil preparation and drainage
Prepare a very well-drained substrate made from light potting soil mixed with sand or pumice. Protea prefers poor soil, similar to its natural maquis habitat. Avoid heavy, clay-based or chalky soils that suffocate the roots.
Feeding
Fertilize lightly in spring and early summer with a low-phosphorus fertilizer (like heather plant food). Over-feeding damages flowering. Reduce or stop feeding in autumn-winter to respect the plant's dormant phase.
Pruning and pinching
Pinch young stems regularly to encourage branching and achieve a compact shape. After flowering, remove spent flowers and dead or misplaced branches. Avoid drastic pruning, which weakens the plant; opt for light, frequent interventions instead.
Health and pests
Watch for sooty mold or scale insects in dry conditions. Ensure good air circulation to limit fungal risks. Roots are vulnerable to Phytophthora; poor drainage can be fatal. Avoid prolonged high humidity around the plant.
Did you know?
The King Protea has been South Africa's national flower since 1976 and features on the country's flag. Its name comes from the Greek god Proteus, who could change shape, because different Protea species produce remarkably varied inflorescences. Its enormous flowers, which can reach 30 cm in diameter, attract nectar-feeding birds in the wild and keep exceptionally well in a vase.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.