投资，蟋蟀草

Just to share some personal opinion with friend aMao and others.

Crab grass is probably the toughest. There is no instant satisfactory way. It takes labor, chemical, and time.

To apply a shield in Spring is very important. I've skipped a couple times, not the end of world though. If the lawn is full of crab already, it'll take more than a year to look somewhat decent.

IMO, professionals don't have the time and interest to know your lawn, the spots. That's understandable, they need to make money.

The most effective strategy, is the have a thick healthy lawn. In that sense, you need to apply 4-6 treatments on annual basis. Water the lawn, over seed in autumn, apply winterizer... All those would be important to take space from crab grass.

Yes to me the headache is bare spots: 尤其是沿马路那一条三尺的lawn，草地沿driveway的那些边，还有就是我们邻居草地里漫山遍野的crab grass.

所有跟帖： 

• 你说得很对，好草和杂草的关系就是正与邪的关系，扶正制邪是最有效的。 -R&D- ♀ (0 bytes) () 07/15/2012 postreply 09:44:49

• 好草排除杂草，只能对付一部分杂草。 -Morning3evening4- ♂ (371 bytes) () 07/15/2012 postreply 12:37:39

• 去年我们这里夏天旱。 -WQPY- ♂ (379 bytes) () 07/15/2012 postreply 16:27:36

• 是，好几波。我度斗争了几年了。：（。 -Morning3evening4- ♂ (117 bytes) () 07/15/2012 postreply 18:09:04