When to Dethatch a Lawn


when two dethatcher lon


whenever a lawn develops successive

fetch it requires dethatching but the

best time of year for the chore depends

on the type of turf grass fetch is a

layer of decaying and dead plant debris

including grass roots shoots

stolens and rhizomes sideways growing

roots and shoots that builds up in a lot

over time reducing the vigor of the

grass grasses that spread through

stolens and rhizomes build a patch more

quickly than bunch forming grasses and

require more frequent dethatching

excessive thatch

along with thatch thicker than half-inch

requires dethatching

a layer of thatch thinner than half-inch

is beneficial to along because it

insulates against temperature changes

and improves the lawns wear tolerance

put a thatch layer thicker than half

inch harbors pests and diseases and

reduces the turfs tolerance to heat and

drought a thick thatch layer also

encourages the grass to root in the

thatch layer creating weak growing turf

that requires intense management the

first sign of thatch buildup is along it

feels bouncy when walking on it to

measure the thickness of a thatch layer

cut a small square of lawn three inches

deep and measure the brown layer between

the soil and the green grass blades cool

season grasses the best time for

dethatching cool season grasses is the

early fall dethatching damage is a lawn

and grass needs 45 days of favorable

growing conditions to recover cool

season grasses stop growing in summer so

dethatching cool season turf grass and

spring limits the time the grass has to

regrow another benefit of the thatching

in fall is that fewer weed seeds sprout

in winter than in spring cool season

grasses include Kentucky bluegrass POA

pratensis which is hearty US Department

of Agriculture plant hardiness zones 2

through 6 tall fescue fs2 Corrine

donation USDA zones 4 through 7 and

perennial ryegrass slowly and perennial

USDA zones 3 through 6 perennial

ryegrass and tall fescue are Bunch

forming grasses so they take longer than

rhizome forming grasses to recover from

dethatching but these species usually

only require dethatching every 4 or 5


warm-season grasses

warm-season grasses benefit from early

spring dethatching dethatching warm

season grasses such as Bermuda grass

Synod on dactyl on which is Hardy in

USDA zone seven through ten and Cilicia

grass Ozio japonica USDA zones five

through ten in fall doesn't allow the

grass time to recover before entering

winter dormancy defect Bermuda grass Zoo

is a grass and other warm season grasses

in spring two to three weeks after the

grass has screened up and when nighttime

air temperatures are above sixty degrees

Fahrenheit Kentucky blue grass and other

rhizome producing grasses often require

yearly dethatching power brakes power

reeks are most effective at the

thatching elan also called a vertical

mower a power Rica's machine with a set

of vertical knives or times that scrape

the fat out of the lawn mechanically set

the power rake so that it removes a

small amount of surface soil as well as

the thatch d fetching along generates a

large amount of plant debris that can be

composted and used as a soil conditioner

to help long recover

apply a light fertilizer dressing such

as 1005 applied at a rate of 8 ounces

for 100 square feet or according to the

manufacturer's instructions irrigate

thoroughly after applying the fertilizer

and water the lawn regularly so that the

soil is constantly moist but never

sudden avoid over fertilizing along

because this can cause excessive thatch