top soil 是不是必要的？

maxbon

想请教各位一个问题？做花园时,那些黑泥是一定要铺的吗？是不是如果铺石头或人造草坪,是不需要铺黑泥？

catty

见过有铺的也有没铺的，铺草的话肯定要铺

PPQQ

! W% [5 e2 k( a% u% hThe following is from the city's link: http://www.edmonton.ca/for_resid ... aq-residential.aspx
7. Can I use washed rock, decorative rock, or bark chips to bring the land up to final grade? No. If you are placing rock mulch or bark mulch, the clay base (rough grade) should be raised to the final grade level before placing any decorative material. The grade should be raised with clay, topsoil, or compacted “road crush” gravel. This is important for side lot swales.

PPQQ

所以不铺土，可以用road crush垫高

maxbon

谢谢各位的信息～！