Yes, you can pressure wash with a garden hose, but not all garden hoses can withstand a lot of pressure. Some garden hoses work well for pressure washing. But - pay attention to the details of your model! You will also need a pressure washer that works with a garden hose. Longer and thicker hoses also affect the pressure in different ways. If your hose isn't the right size and make - water might not reach where you intend! Using water elsewhere can lower the pressure too. Finally, freezing or hot temperatures can cause damage to any hose, so check your garden hose for damage before you decide to use it for pressure washing.