Crabgrass in the lawn . Crabgrass is not easy to control these days. There are pre-emergent products to reduce crabgrass germination. These products are not perfect but they can be a tool to help. These products are applied in the spring before the crabgrass germinates. They do not have any effect on crabgrass after it has come up. T here used to be a product that could be applied in the summer to treat crabgrass that managed to get past the pre-emergent treatment. Now, there is not such a product authourized for use in Ontario. Crabgrass like warm soil and is thus most often found along the edges of the lawn next to the walks and driveways. The asphalt and concrete absorb the heat from the sun and transfer it to the lawn soil along the edges. The other place that crabgrass will sprout is in areas of the lawn that are thin or bare and in the sun. Crabgrass rarely grows in shady bare areas. If crabgrass is growing in the middle of the lawn (away from the edge) it may be that the lawn there is damaged by insects that caused the lawn to thin out. Treating that area for the insects (if needed) and then seeding to increase the grass density is the best way to combat crabgrass if it is not along the edge. One other thing about crabgrass along the edge. Make sure to allow the grass to grow to its full 3 inch height along the edge. Do not whipper-snip the lawn too low along the edge as this makes the soil warmer and it is easier for crabgrass to grow in those conditions. http://bit.ly/1LaNuIk

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