If they dont guarantee their work this could leave you with bare spots in your landscape that could detract from the beauty. By setting a budget out beforehand however, you will be able to keep track of money as it is being spent and know when you are reaching your limit. Native plants are made specifically to grow in the soil found in the desert which isnt very nutrient rich. Many people love to see a well manicured lawn with just the right amount of foliage and stones to make it seem natural. There many ideas by which designers or landscape artists base their designs. They may create designs that require a lot of time and maintenance without really understanding the consequences.
The more common landscaping stone used for outdoor landscaping are granite, limestone and marble. Simple landscaping can look a lot neater as opposed to more ornate landscaping which can sometimes look as if it has not been taken care of enough. This method gets you attractive landscaping borders for free.