For the list of all the Garden Tips, click here . Crabgrass Crabgrass is an annual grass which can pose a problem in lawns and gardens in southern Ontario. Once crabgrass makes its home in your garden it is a very unpleasant and difficult weed to eliminate.
Crabgrass spreads by seeds produced and distributed in the soil from previous years.
Seeds can live for up to 15 years in the soil, waiting for the opportunity to germinate when a bare patch of soil is exposed to sunlight. Each crabgrass plant can produce up to 150,000 of seeds. This usually takes place in about mid-May and germination will continue throughout the spring and summer. Mother Nature supplies a helpful clue since crabgrass seed germination coincides with Forsythia blooms. Crabgrass will not become highly visible in lawns and gardens until mid-summer.