In terms of detail, it is important to include enough information to give a clear overview of your landscaping business. However, you don't want to include so much detail that the plan becomes cumbersome. A good rule of thumb is to keep the business plan to around 30 pages. As for frequency, it is generally a good idea to update your business plan on an annual basis. This ensures that your plan stays relevant and reflects any changes in your business. However, you may need to update it more frequently if your business is growing rapidly.