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Sorghum halepense
Sorghum halepense
Sorghum halepense
Sorghum halepense

Sorghum halepense

TAXONOMY

FamilyPoaceae
GenusSorghum
Zone7

ABOUT

Sorghum halepense, commonly known as Johnsongrass, is a perennial grass native to the Mediterranean region. It is a member of the Poaceae family and the Sorghum genus. This plant is known for its aggressive growth and ability to spread through rhizomes. It thrives in subtropical climates and can be found in a variety of habitats, including fields, roadsides, and disturbed areas.

ALSO KNOWN AS

Evergreen Millet
Johnsongrass
Trachypogon Avenaceus
Andropogon avenaceus
Andropogon decolorans
Andropogon dubitatus
Andropogon dubius
Andropogon halepensis
Andropogon halepensis subsp. anatherus
Andropogon halepensis subsp. muticus
Andropogon halepensis var. anatherus
Andropogon halepensis var. effusus
Andropogon halepensis var. genuinus
Andropogon halepensis var. muticus
Andropogon sorghum subsp. exiguus
Andropogon sorghum subsp. halepensis
Andropogon sorghum subvar. leiocladus
Andropogon sorghum subvar. trachycladus
Andropogon sorghum var. exiguum
Andropogon sorghum var. halepensis
Andropogon sorghum var. perennis
Blumenbachia halepensis
Holcus decolorans
Holcus exiguus
Holcus halepensis
Holcus sorghum subsp. exiguus
Milium halepense
Rhaphis halepensis
Sorghum crupina
Sorghum decolor
Sorghum decolorans
Sorghum dubium
Sorghum halepense f. halepense
Sorghum halepense f. muticum
Sorghum halepense var. genuinum
Sorghum halepense var. halepense
Sorghum halepense var. latifolium
Sorghum halepense var. muticum
Sorghum saccharatum var. halepense
Sorghum schreberi

OVERVIEW

WaterMoist
SoilLoamy
LightDirect Bright (8 Hours)
Temperature25° C
Humidity60%
GDD1,350
Dormancy3 Months
pH6.5
Pressure1,013 mbar

DETAILS

Care Instructions
Johnsongrass requires bright, direct sunlight for optimal growth. It prefers moderate temperatures and can tolerate a range of humidity levels. Regular watering is necessary, but the soil should be allowed to dry out partially between waterings. This plant can be challenging to manage due to its rapid growth and spreading nature.
Harvest
Sorghum halepense, commonly known as Johnsongrass, is typically harvested when the seed heads are fully mature and dry, usually in late summer to early fall. Harvesting involves cutting the stalks close to the ground, often using a sickle or mechanical harvester. It is important to ensure that the seeds are fully mature to maximize yield and quality. After cutting, the stalks should be left to dry in the field for a few days before threshing to separate the seeds from the chaff. Proper drying and storage are crucial to prevent mold and spoilage.
Soil
Johnsongrass prefers well-draining loam soil with moderate nutrient levels. It can tolerate a range of soil types but thrives best in fertile, well-drained soils. Ensure the soil is not waterlogged to prevent root rot.
Fertilizer
A balanced fertilizer with an N-P-K ratio of 10-10-10 is suitable for Johnsongrass. Fertilize during the growing season to support its vigorous growth. Avoid over-fertilizing, as this can lead to excessive growth and potential invasiveness.
Repotting
Repotting Johnsongrass is generally not necessary unless it is being grown in a container. If repotting is required, do so in the early spring before the growing season begins. Use a well-draining soil mix and ensure the new container has adequate drainage.
Propagation
Johnsongrass can be propagated through seeds or rhizome division. For seed propagation, sow seeds in the spring. For rhizome division, dig up the plant and separate the rhizomes, then replant them in suitable soil. Propagation is best done in the spring or early summer.
Pruning
Pruning is necessary to control the spread of Johnsongrass. Regularly cut back the plant to prevent it from becoming invasive. Prune during the growing season to manage its size and spread.
Toxicity
Johnsongrass is toxic to livestock, particularly when it is stressed or damaged, as it can produce cyanogenic compounds. It is also considered toxic to pets and humans if ingested. All parts of the plant can be toxic, so handle with care.
Additional
Johnsongrass is known for its rapid growth and ability to outcompete other plants, making it a problematic weed in many areas. It is important to manage its growth carefully to prevent it from becoming invasive. Regular monitoring and control measures are recommended.
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How To Grow Sorghum halepense | EarthOne