Some wildflowers can be started indoors and later transplanted, however this particular mixture of seed is best established directly outdoors, when the weather is warm and all danger of frost has passed. Begin by prepping your sowing area by tilling the dirt. You can do this by using a shovel or a motorized tiller device, such as the rototiller. This piece of equipment is sold at many local garden centers and home improvement stores. You may consider renting one, versus buying it outright if you don't plan to use it often. Once the dirt is loosened up, rake away any old plant life and level your sowing area.
Now that you are ready to plant the seed mixture, simply pour the seeds in a bowl or bucket, mixing them with a bit of play sand. Scatter the seeds to the surface of the soil, allowing them to receive direct sunlight. This is crucial for most wildflower seeds to develop, so don't cover them with soil. Instead, use a roller or the back of a shovel, to lightly press the seed mixture into place. Water immediately after sowing, to make sure that they stay put. Use a light shower setting, or mist setting to avoid washing them away.