I've been trying to get some wildflower seeds to grow on the edge of my yard for a while, and am wondering when the best time to spread the seed kit is, and how I should do it. Think about broadcast spreading in a pasture.
For seeds to germinate they need firm contact with the soil and sunlight and frequent regular shallow watering until established. As well as low nitrogen fertilizer.
I would cut that grass with a line trimmer first. Grasses love to be mowed or eaten down. Not too far but regularly. Tall grass is wonderful once everything is growing vigorously. You have to chop that grass down first. Rake up the clippings, they do not have any fertilizer you should be interested in...allow sun to reach patches of your soil among the grasses where you are able to germinate wildflower seed.
Lightly rake bare soil patches. Sow your seed by hand, tamp the soil down with your hands to firm over the seed. Water those patches by hand for the next 2 weeks. By the time your wildflowers start growing vigorously, your tall grasses will not be so tall as to hide the flowers nor shade the flowering plants.
By the end of the season you should be able to mow, weed wack the entire patch down, grasses and wildflowers. This time, do not bag your clippings because there will be seeds you want to have back into your soil. Your patches of wildflowers.
In the spring, make sure you fertilize with a formula of even numbers. Remember to lightly water those patches to get the seeds germinated and established once again.
Patches of wild flowers look far more natural and breath taking done this way. If you spread wildflower seed now in your tall grass you are asking too much of the wild flower seed.
Have fun, let us know how it turns out...please send pictures of before and later.