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St. Augustinegrass

Description

St. Augustinegrass is a warm-season grass with medium density and medium to dark green color. Of all the warm season grasses, it is the least cold tolerant and has the coarsest leaf texture. St. Augustinegrass grows best in warm, humid areas that are not exposed to long periods of cold weather. In fact, its lack of cold tolerance is the major limiting factor in determining its use in North Carolina. Centipedegrass can often be confused with St. Augustinegrass. However, centipedegrass has alternating leaves at the nodes whereas St. Augustinegrass has opposite leaves at the nodes. Centipedegrass also has a more pointed, slenderer leaf blade than St. Augustinegrass. Both leaf blades are V-shaped in cross section, but that of St. Augustinegrass has a more obviously boat-shaped tip.

lawn Maintenance for September - November

Disease Control

Check for Brown (Large) Patch.

Fertilization

DO NOT fertilize St. Augustinegrass after August 31.

Insect Control

Follow June through August guidelines.

Irrigation

Water to prevent drought stress while the grass is actively growing and after the lawn goes dormant to prevent excessive dehydration.

Mowing

Same as March through May guidelines.

Thatch Removal

Check for thatch layer in early September. If the thatch layer is ¾ inches thick, plan to dethatch in the spring.

Weed Control

If crabgrass and goosegrass are present, plan to apply a preemergence herbicide next spring.

Presentations

Publications

Species Data

Seedhead/Flower

seedhead a thick spike with spikelets imbedded along the sides

p1130800 staugustinegrass
p1130800 staugustinegrass
p1130800 staugustinegrass
seedhead
seedhead
seedhead
seedhead3
seedhead3
seedhead3
seedhead4
seedhead4
seedhead4
Vernation type

leaves folded in the bud

node2
node2
node2
sheath2
sheath2
sheath2
Ligule Type

short fringe of hairs, 0.01 inches (0.3 mm) long

ligule
ligule
ligule
ligulearea2
ligulearea2
ligulearea2
Growth Season/Life Cycle

warm season turf

Auricle type

absent

ligulearea2
ligulearea2
ligulearea2
Leaf blade tip shape

boat shaped; blunt; not hairy

staugustine centipede
staugustine centipede
staugustine centipede
autopsy
autopsy
autopsy
grass
grass
grass
grass4
grass4
grass4
leafarrangement
leafarrangement
leafarrangement
leafblade
leafblade
leafblade
leafbladetip
leafbladetip
leafbladetip
staugustinegrass p1190867
staugustinegrass p1190867
staugustinegrass p1190867
staugustine centipede
staugustine centipede
staugustine centipede
Leaf blade width

0.16 - 0.4 inches (4 - 10 mm) wide

staugustine centipede
staugustine centipede
staugustine centipede
leafarrangement
leafarrangement
leafarrangement
leafblade
leafblade
leafblade
leafbladetip
leafbladetip
leafbladetip
seedhead3
seedhead3
seedhead3
staugustine centipede
staugustine centipede
staugustine centipede
Stolon Presence

present; stout

seedhead4
seedhead4
seedhead4
stolon
stolon
stolon
Rhizome Presence

absent

Collar Type

continuous; not hairy, constricted

collar3
collar3
collar3
ligulearea2
ligulearea2
ligulearea2
sheath2
sheath2
sheath2
Sheath Margin

open; sheath is slightly hairy along edges and toward top

sheath2
sheath2
sheath2