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SFM Extra Pre-emergent Herbicide

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SFM Extra Herbicide (Oust Xtra) by Alligare LLC combines sulfemeteron and MSM metsulfuron for immediate and long term pre-emergent control of tough weeds like nutsedge and johnsongrass.

Target Pests

SFM Extra Herbicide is for pre-emergent and post-emergent control of broadleaf and grassy weeds such as bluegrass bahiagrass barnyardgrass bur buttercup bur clover cocklebur fescue fiddleneck fixweed foxtail foldenrod johnsongrass little barley pepperweed plantain rye sandbur sheperd's purse signalgrass sweet clover wheat wild barley wold carrot wild garlic wild oat and many other listed broadleaf weeds. SFM Extra Herbicide also controls various differnet woody plants and vines

For Use In

SFM Extra is for use in conifer plantations and non-crop areas such as non-irrigation drainage ditches intermittent drainage ditches flooded low lying areas seasonally dry flood plains deltas marshes swamps and bogs (after water has receded) unimproved turfgrass site preperation areas airports highways railroad and utility rights-of-way sewage disposal areas farmyards fuel storage areas fence rows soil bank land and barrier strips.


Alligare SFM Extra rapidly inhibits the growth of susceptible weeds by being absorbed through both the roots and foliage of plants when applied as a spray. Alligare SFM Extra is absorbed primarily via the roots when applied on dry fertilizer. Two to 3 weeks after application to weeds the growing points turn reddish-purple and leaf growth slows. Within 4 to 6 weeks of application, leaf veins and leaves become discolored followed by the growing points dying.

Cold, dry conditions will delay the herbicidal activity of Alligare SFM Extra while warm, moist conditions following application will accelerate it. Vines, undesirable hardwoods and weeds hardened-off by drought stress are less susceptible to Alligare SFM Extra. For preemergence weed control, moisture is necessary to move Alligare SFM Extra into the soil.

APPLICATION TIMING Apply Alligare SFM Extra sprays before herbaceous weeds emerge or shortly thereafter for control of broadleaf weeds and grasses. For impregnated fertilizer applications, apply before weeds emerge.

APPLICATION RATES Apply Alligare SFM Extra at the rates indicated by conifer species. Use a lower rate on coarse-textured soils (i.e., loamy sands, sandy loams) and a higher rate on fine textured soils (i.e. sandy clay loams and silty clay loams).

Coverage Area

Each 4 pound container of SFM Extra Herbicide should cover approximately 6.5 acres at the maximum rate of application per year. Do not apply more than 10 2/3 of an ounce per acre per year.

Time to Kill

SFM Extra Herbicide begins to kill target weeds 2 weeks after contact but can take up to several weeks for complete control all depending on treatment area and application.

Mix Rate

For conifer plantation applications mix at a rate of 1 1/3 to 5 1/3 of an ounce per acre depending on species and application site. For non-crop areas apply at a rate of 2 2/3 to 5 1/3 of an ounce per acre depending on target weed or grass and the application site.

Active Ingredient

Sulfometuron Methyl 56.25%, Metsulfuron Methyl 15.00%

SFM Extra Pre-emergent Herbicide

Product Q & A

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I want to use it on an orchard of walnut seedlings. Will the walnut trees survive the treatment?
Rex C on Mar 12, 2018
BEST ANSWER: It does have a potential to kill tress, what are you trying to control around the seedlings?

Customer Reviews

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I've been pulling crabgrass for two years in my ornamental peanut ground cover. I used this product and the crabgrass as well as the jew weed is dying. I applied another application two weeks later. I don't see any new sprouts and the above-mentioned weeds are continuing to die. I am thrilled. Product did not hurt the ground cover.
August 13, 2015
I use this to suppress the seedhead and overall growth of Bahia and it works great.
July 22, 2015
Product works as described. There is some yellowing of the Bermuda but the crab grass is dying. Thanks for the fast shipping of a great product
July 27, 2014
Killed Johnson grass
It is killing the johnson grass in my pasture that was getting out of control. It did kill some of the other grasses as well, but none that were very nutritious to cattle though.
July 20, 2014
If all you want is bare ground this is definitely the product to use!
May 15, 2013

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