Poa annua

Annual Bluegrass

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Cool-season annual grass, common lawn weed worldwide, forms dense green clumps, tolerates mowing well but competes with desirable turf.
yard Outdoor plants wb_sunny Shade / Half-shade / Sun pets Pet Friendly
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Plant Details

Common Name Annual Bluegrass
Family Poaceae
Genus Poa
Species Annua
Origin Cosmopolitan
Blooming Seed heads form in spring/summer, inconspicuous flowers.
Leaf Color Bright green to blue-green
Sunlight Shade / Half-shade / Sun
Category Outdoor plants
Pet Friendly check Yes
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Care & Maintenance

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Soil

Adaptable to various soils but prefers fertile, moist loam with good drainage

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Watering

Requires regular watering during active growth (spring/fall), drought tolerant once established but turns dormant/brown in extreme heat/drought

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Sunlight & Care

Prefers full sun for best density, tolerates moderate shade, may brown in intense summer heat without water

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Fertilization

Apply balanced fertilizer in spring and fall to maintain density and color

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Pruning

Mow regularly at 2.5-3 inches height, remove seed heads if undesirable

Pest Control Aphid Armyworm Billbug Cutworm

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
23° – 95°
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)
2000 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1800 – 4000
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
20% – 70%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1500
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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