Biennial weeds normally occur at the same time as which group?

Biennial weeds normally occur at the same time as which group?

• A. Perennial broadleaf weeds
• B. Annual grasses
• C. Summer annuals
• D. Biennial weeds only

Answer: (A)

Biennial weeds have a two-year life cycle: they survive the first year as a rosette and then flower in the second year, often then dying or persisting as seed. Because they persist across years in a similar way to other long-lasting plants, they tend to show up with perennial broadleaf weeds, which also survive year after year in turf. That’s why they commonly occur at the same time as perennial broadleaf weeds. Annual grasses and summer annuals complete their life cycles in one season, so their timing doesn’t align as consistently with biennials. Biennials aren’t restricted to showing up only with other biennials, either.

Biennial weeds have a two-year life cycle: they survive the first year as a rosette and then flower in the second year, often then dying or persisting as seed. Because they persist across years in a similar way to other long-lasting plants, they tend to show up with perennial broadleaf weeds, which also survive year after year in turf. That’s why they commonly occur at the same time as perennial broadleaf weeds.

Annual grasses and summer annuals complete their life cycles in one season, so their timing doesn’t align as consistently with biennials. Biennials aren’t restricted to showing up only with other biennials, either.