With a landscaping business you need to stay in touch with your workers! Google just made it a little bit more affordable to do that. I’ve been using googles phone plan Project Fi personally for about 6 months. It seems to work pretty well for what I need, and I love the fact that it uses Wifi for phone calls when I don’t have cell service (sometimes working in a metal building has it’s disadvantages).
If you need a new phone plan they offer group plans starting at $20 a month plus $15 per additional phone (https://blog.google/products/project-fi/introducing-project-fis-group-plan/). Data is charged at $10.00 per Gigabyte. They also work with either Sprint, or T Mobile, so you may want to check their coverage in your area before signing up.
The biggest downside of the plan is probably the cost of the phones. The cheapest phones they offer are $200.00 a piece (Nexus 5x). I know some people that have them and haven’t heard any complaints (but not using them out in the field).
If you don’t use very much data, or only need a few plans checkout options from Ting, and Republic wireless. Ting is completely usage based ($6 per phone plus text plus data, plus phone minutes https://ting.com/rates).