Which statement about mulch is true?

• A. It conserves moisture, moderates soil temperature, suppresses weeds, and adds organic matter as it decomposes
• B. It increases soil compaction
• C. It eliminates all weeds instantly
• D. It prevents soil organisms from living

Answer: (A)

Mulch serves several key roles in garden beds: it helps conserve moisture by reducing evaporation, moderates soil temperature by insulating the surface, suppresses weeds by blocking light and seed germination, and as organic mulch decomposes it adds organic matter to the soil, improving structure and fertility. These combined effects support healthier roots and more active soil biology. Mulch does not typically increase soil compaction; it can even help prevent crusting and improve infiltration. It also doesn’t eliminate all weeds instantly—weed suppression builds over time as the mulch layer stabilizes. And it doesn’t prevent soil organisms from living; it provides food and habitat for many beneficial organisms.