一劳永逸的办法可能就是铺水泥，但是水泥缝也会长杂草。一年一次的杀草药不能缺。
杀草药的区分
（1）broad spectrum herbicide (grass and weed killer) roundup, groundclear etc.
(2) weed killer (only kills broadleaf herbs, and leave behind narrow leaf plants (such as grass and other grass-like weed).
(3) preemergence herbicide, kill only seeds, don't touch the plants.
如果你已经铺了假草，那么喷一层（1）broad spectrum herbicide 把所有活的植物杀死，就好了。一年要喷一次，因为种子又会被风刮过来。
