Monadenium guentheri

Guenther's Monadenium

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Monadenium guentheri is a succulent shrub in the Euphorbiaceae family, characterized by upright spiny stems and milky sap. It requires bright light and dry soil to thrive indoors.
yard Indoor plants wb_sunny Half-shade / Sun pets Not pet-safe
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Plant Details

Common Name Guenther's Monadenium
Family Euphorbiaceae
Genus Monadenium
Species Guentheri
Origin Tropical Africa
Blooming Small yellow-green cyathia in spring/summer, rarely seen indoors
Leaf Color Dark green
Sunlight Half-shade / Sun
Category Indoor plants
Pet Friendly close No
yard

Care & Maintenance

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Soil

Cactus mix with high perlite content for maximum drainage, pH 6.0-7.5

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Watering

Water only when soil is completely dry; reduce watering in winter dormancy; handle latex sap with care as it irritates skin

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Sunlight & Care

Requires bright indirect light or morning sun; avoid harsh midday heat in summer to prevent scorching

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Fertilization

Apply diluted succulent fertilizer monthly during active growth (Spring/Summer), avoid feeding in winter

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Pruning

Wear gloves and eye protection to cut back stems; allow sap to dry before handling cut surfaces

Pest Control Mealybug Scale Insect Spider Mite

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 3 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
54° – 90°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
35% – 60%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
2000 – 25000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1200 – 3000
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
10% – 40%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)
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Common Problems

Something wrong with your Monadenium guentheri? Select a symptom to diagnose and fix the issue.

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