Why 2 to 4 Inches of Mulch Hold Water and Stop Weeds: 5 Practical Reasons for Gardeners

https://www.fastbookmarks.win/everyone-thinks-watering-every-day-here-s-what-one-inch-of-water-per-week-actually-reveals

5 Reasons 2 to 4 Inches of Mulch Is the Sweet Spot for Moisture Retention and Weed Control If you've ever spread mulch and wondered why people recommend "about 2 to 4 inches" and not more or less, you're not alone