Too cold to spray herbicide?

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or best results spraying should be done when broadleaf weeds are young
and actively growing. Older weeds will be harder to kill.
1. Spray at any time during the growing season when weeds are actively
growing, although spray works faster with temperatures above 70°F. To avoid damage do not apply to St. Augustinegrass or centipedegrass while emerging from winter dormancy. Damage may also occur on these grasses if temperatures drop below 45°F within 72 hours of application. Avoid spraying
St. Augustinegrass when temperatures are above 90°F and under conditions of high humidity. Under these conditions or in cases of accidental overdose,
some slight temporary discoloration of the St. Augustinegrass may occur.
2. Irrigate the lawn 2 or 3 days prior to spraying to ensure that weeds are
growing and able to absorb the herbicide.
3. Mow 1 to 2 days before treating.

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