Nevada law requires that companies and each individual who sprays for weed control have a special license. It is the C6 license issued by the Nevada Department of Agriculture .
It is NOT included with any other license.
Timing spraying is important. Not all licensed companies have a great ratio between licensed sprayers / applicators and square feet of landscape they take care of. If they miss the "window" it can affect their customers landscaping. What is the ratio for your landscaper? Is it realistic?
The time frame for spraying is pretty small. Since each person who sprays needs a license it is important to have a landscaping company that is properly staffed to be able to spray at their customers properties when the time comes. Just because a company is large does not mean they have enough licensed staff or are .
The cost of spraying will take into account how long it will take to do the work, what prep work needs to be done, and how much and what type of herbicide is used. Sometimes more than one application is needed.
There are some granular herbicides but they need to be activated by water and considering when and how much water we get from rain can affect if and when it gets activated. If can get blown out of the landscaping into areas it is not intended for and or activated when it is not needed which is pollution and wasteful spending. Granular fertilizer has a time and place for when it is / should be used and we assess each property on a case by case basis.