dope , like more desirable plants , have specific horticultural requirement . Their success look on adaption to extreme conditions . Weeds prosper while more suitable varieties are withering in the warmth of summer or during droughts . All areas have aboriginal weeds ; most also have non - native skunk that invade and menace to grow over not only agricultural and decorative grasses and plants , but native weeds as well . Indiana has an abundance of both types .

Identification

Indiana is in the Midwest , between Ohio and Illinois . The res publica reaches from Lake Michigan on the north to the Ohio River on its southern boundary . The Hoosier province straddles USDA hardiness Zone 5 , but the Ohio River Valley is in Zone 6 . Correspondingly , weeds in southern Indiana often resemble those of Southern rather than Midwestern lawns . Indiana lawns kitchen range from cool - season Kentucky bluegrass - Festuca elatior mix in the north to transitional zoysia and improbable fescue grass in the south .

Time Frame

Lake Michigan and the Ohio River move Hoosier growing clime . Last average frost dates vary through late April and early May . Evansville , in the southwestern " toe " of the state , is hoarfrost - innocent by the last workweek in March . Gary , in the northeast corner of the Department of State and on the shoring of Lake Michigan , has the in vogue Robert Lee Frost - free day of the month in mid - May . astonishingly , Scottsburg , atop a plateau and just 30 nautical mile northerly of Louisville , Kentucky , has a last frost particular date closer to Gary ’s than Evansville ’s .

Annual Grasses

Indiana ’s annual grass locoweed include prominent and legato crabgrass and goosegrass , a lookalike with a white mall ; all three have prostrate tip . Longspine sandbur is an good grass that grows in sandlike grease along the state ’s northern borderline . Annual bluegrass has become common across the state . one-year weed dope begin germination in very early spring . The most effective ascendence are pre - emergent herbicides . Corn gluten meal is an substitute organic pre - emerging control for finger grass .

Perennial Grasses

Dallisgrass , an upright clump grass , grows across Indiana . lily-livered nutsedge favors low - lie , poorly - drain soil , but spreads easy by germ and stolon into lawn . Bermuda sens is a warm season grass that escape into neighboring lawns as a weed along the Ohio River . Nimblewill is a more widespread stoloniferous grassy grass that resemble Bermuda skunk . Rough bluegrass is a warm season grass native to the Southeastern U.S. that has migrated throughout Zone 6 . Perennial weeds take post - emergent herbicides ; their established root must be destroyed with a systemic herbicide .

Broadleaf Weeds

Annual broadleaf weeds include priming ivy , ( creep Charlie , grovel Jenny ) , white clover , common chickweed and black medic . Common blowball , assorted plaintains , prostrate spurge ( milk purslane ) , and prostrate knotweed are statewide repeated broadleaf lawn locoweed . Purslane is prevalent in the north and Japanese clover afflicts lawns in the southeast . dope and feed Cartesian product containing 2,4 - calciferol , MCPP and dicamba control broadleaf lawn weeds .

Invasive Weeds

Indiana prohibits especially troublesome noxious dope , let in Canada thistle , Johnsongrass and dog grass . The State Department restricts develop ox - optic daisy and pennycress . Thirty - four plant have been destine as invasive , including Canada thistle , ground Hedera helix , royal wintertime tree creeper , sweet clover and tall fescue .

References

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