Protea cynaroides

King Protea

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Large flowering shrub native to South Africa, known for its impressive rose-like flower heads and leathery grey-green leaves. Best in full sun conservatories or Mediterranean climates.
yard Outdoor plants wb_sunny Sun pets Not pet-safe
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Plant Details

Common Name King Protea
Family Proteaceae
Genus Protea
Species Cynaroides
Origin South Africa
Blooming Large flower heads bloom in winter to spring, highly ornamental and long-lasting.
Leaf Color Grey-green to deep green
Sunlight Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Specialized sandy, acidic mix with low phosphorus. Excellent drainage essential to prevent root rot.

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Watering

Water regularly during growth but allow topsoil to dry slightly between waterings. Reduce in winter dormancy.

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Sunlight & Care

Full sun exposure required for flowering tolerance of partial shade reduces bloom quality significantly.

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Fertilization

Use low-phosphorus fertilizer sparingly once a month during active growing season only.

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Pruning

Prune immediately after flowering to remove spent blooms and shape the plant, avoiding cutting into old wood.

Pest Control Aphid Mealybug Scale Insect Thrip

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 4 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
41° – 86°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
30% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
3000 – 40000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1200 – 3500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
10% – 50%
% volumetric
Water content in the growing medium
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Soil EC
200 – 800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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