When the lilacs bloom, it's time to apply crabgrass control, said Paul O. Johnson, SDSU Extension Agronomy Field Specialist.
"The products should not be put out too early as they only have a certain period of effectiveness and may not last the full season, and then you will have late season crabgrass in the lawn," he said.
The best time to apply these products each year, Johnson said is when the lilacs start to bloom.
"In a normal year this is about the middle of May, but this year with the cool spring it will be delayed a week or two," he said. "If you get your crabgrass treatment out too early and get some late season emergence there are some post-emergence treatments that can take out a flush of plants, but be aware that any seeds that germinate after the spraying will need another treatment as there is no residual with post-emergent treatments."
Crabgrass control recommendations
Johnson explained that crabgrass is a warm season annual grass that is capable of producing 150,000 seeds per plant. Crabgrass Seedlings appear pale green and have a coarser leaf.
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When the lilacs bloom, it's time to apply crabgrass control, said Paul O. Johnson, SDSU Extension Agronomy Field Specialist.
"The products should not be put out too early as they only have a certain period of effectiveness and may not last the full season, and then you will have late season crabgrass in the lawn," he said.
The best time to apply these products each year, Johnson said is when the lilacs start to bloom.
"In a normal year this is about the middle of May, but this year with the cool spring it will be delayed a week or two," he said. "If you get your crabgrass treatment out too early and get some late season emergence there are some post-emergence treatments that can take out a flush of plants, but be aware that any seeds that germinate after the spraying will need another treatment as there is no residual with post-emergent treatments."
Crabgrass control recommendations
Johnson explained that crabgrass is a warm season annual grass that is capable of producing 150,000 seeds per plant. Crabgrass Seedlings appear pale green and have a coarser leaf.
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