Non-selective weed killers such as Weed Weapon Extra Strength, Rapid Action and Weed Weapon Natural Power kill almost all kinds of plants. Use them very carefully in lawns for spot spraying only, and be sure to keep them away from shrubs and bedding plants. Some of these (e.g. glyphosate in Weed Weapon Extra Strength) are “inactivated” once they come in contact with the soil and are therefore useful when applied prior to establishing a new turf stand.
Selective weed killers such as LawnPro Turfclean Ultra, LawnPro Turfclean and LawnPro Prickle and Hydrocotyle kill one type of plant but not another–for example, broad-leaved weeds but not grass weeds. This selectivity may be due to differences in herbicide absorption, translocation or physiological differences between weeds and the turfgrass.