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Pre-emergent Herbicides
Pre-emergent herbicides are generally used as a last resort, when more sensible means of controlling weeds have not been employed or have not worked well.  Those of you with a weed-infested lot adjacent to your property, might have no option but to use these products.

Please try the following weed-controlling strategies first:

  • Mulch all bare ground 4" to 6" deep.  Uncovered soil is an invitation to unwanted germination.
  • Minimize or avoid tilling, double-digging or other soil-churning activities.  Exposing long-dormant weed seeds to sunlight will cause them to sprout.
  • Mow your lawn when it has grown one-quarter inch above the mower blade height.  More frequent mowings take less effort and create a much denser turf which resists drought and weeds to a greater degree than a sparse stand of grass.
  • Water only those plants that are dry.  Applying water everywhere, whether it is needed or not, will encourage weed germination and fungus proliferation as well.
  • Hoe, hoe, hoe!  Most of us do need a little more exercise.

These summaries DO NOT replace the label on the container of the product.  If you consider yourself subject to federal laws, you must 
still read that label and follow its recommendations.

AMAZE or XL
May be applied to:  established warm-season turf grasses as well as certain ornamentals including bedding 
     plants, vines, groundcovers, shrubs and trees.

Interferes with germination of:  most annual grasses and many broadleafed weeds.

Application rate:  in turf, 2.5 to 3.5 pounds per 1000 square feet.  In ornamentals, 4.5 to 7 pounds per 1000
     square feet.

Activation requires:  shallow (one- to two-inch-deep) cultivation or, easier still, rainfall or watering.

Time and frequency of application:  in flower beds, after each replanting.  Under most conditions, 
     mid-February and mid-September.  For Grassbur control, in  recently-planted landscapes or in 
     landscapes irrigated frequently, mid-February, mid-May and mid-September.

Other information:  XL is sold in 50 pound bags, Amaze in smaller packaging.  Do not apply to 
     cool-season grasses.  May be applied to wet foliage.

BETASAN
May be applied:  to well-established turf grasses, as well as certain ornamentals including bedding plants, 
     groundcovers and shrubs.

Interferes with germination of:  Crabgrass, Annual Blue Grass and seven other weeds.

Application rate:  for Crabgrass control, 6 to 8 pounds per 1250 square feet.  For Annual Blue Grass and 
     certain other weeds, 10 pounds per 1250 feet.

Activation requires:  irrigation for ten to fifteen minutes after application.

Time and frequency of application:   mid-january, mid-April and mid-September.

Other information:  do not reseed within four months of application.

EPTAM
May be applied:  around established bedding plants, shrubs and trees.

Interferes with germination of:  Nutsedge, Bermudagmss and a few other weeds.

Application rate:  1 pound per 200 square feet.

Activation requires:  immediate tilling into the upper two to three inches of soil, followed by a light 
     watering for three to five minutes.

Time and frequency of application:  around herbaceous plants, apply after growth is three to five inches 
     high or two weeks after transplanting.  Around groundcovers or shrubs, apply after growth starts in 
     spring or two weeks after transplanting.

Other information:  only product that MUST be tilled into the soil.

FIRST DOWN or TEAM
May be applied:  to established warm-season turf grasses as well as Perennial Rye Grass.

Interferes with germination of:  Crabgrass and most other weedy grasses.  Provides partial control of a 
     few broadleafed weeds.

Application rate:  2.25 to 3.5 pounds per 1000 square feet.

Activation requires:  irrigation soon after application.

Time and frequency of application:  once a year, in early- to mid-February.

Other information:  do not reseed within four months of application.

GALLERY or PORTRAIT
May be applied:  to established turf grasses, both warm season and cool season.

Interferes with germination of:  many broadleafed weeds.

Application rate:  4.6 to 5.7 pounds per 1000 square feet.

Activation requires:  watering 1/2 inch or more soon after application.

Time and frequency of application:  twice a year, mid-September and mid-February.

Other information:  do not apply to non-turf areas.

PREEN
May be applied:  to vegetables, bedding plants, groundcovers, shrubs and trees.

Interferes with germination of:  both annual grasses and broadleafed weeds.

Application rate:  around ornamentals, I ounce per 10 square feet.  In vegetable gardens, 1 pound per 640
     square feet in heavy clay soils, or 1 pound per 1280 square feet in light sandy soils.

Activation requires:  lightly watering it in.  In vegetable gardens, rake into the upper one to three inches 
     of soil within 24 hours of applying.

Time and frequency of application:  begin in mid- to late-January.

Other information:  do not apply to wet foliage.

Copyright at Common Law by Manuel Flores