Stenotaphrum helferi

St. Augustine Grass (Helferi)

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A warm-season turfgrass species, native to tropical regions of the Americas. It features broad, lush green blades ideal for lawns and is often distinguished by its slightly different growth habit compared to Stenotaphrum secundatum.
yard Outdoor plants wb_sunny Half-shade / Sun pets Not pet-safe
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Plant Details

Common Name St. Augustine Grass (Helferi)
Family Poaceae
Genus Stenotaphrum
Species Helferi
Variety helferi
Origin Tropical Americas
Blooming Small white flowers in summer, primarily grown for foliage
Leaf Color Deep emerald green
Sunlight Half-shade / Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Rich loamy soil with good drainage; tolerates various textures but prefers moisture retention

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Watering

Deep watering required during active growth (spring/summer). Reduce significantly in winter dormancy to prevent root rot.

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Sunlight & Care

Requires full sun to thrive. Can tolerate partial shade in very hot climates, may thin out in low light.

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Fertilization

Apply nitrogen-rich fertilizer monthly during growing season; reduce frequency in fall/winter.

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Pruning

Mow regularly to maintain height; remove dead thatch annually for air circulation.

Pest Control Aphid Armyworm Chinch Bug Grub

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
50° – 104°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 80%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
5000 – 60000
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
25% – 70%
% 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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