Hello Natalie,
I would like to help you but I live and garden in Texas and I know that my climate and soil are very different from yours.
It could be that you have been planting the wrong kind of wildflowers as well as maybe planting them at the wrong time of year.
Here is a link to the Wildflower Center showing the plants they recommend for Idaho, maybe you will find something is there that is available to you, and also how to handle the planting.
http://wildflower.org/collecti...
I hope the link helps you, you could also try contacting a native plant society in your area they might be able to advise you.
Also check with the neighbors they probably know what works best around there.
Good luck and let me know how it works out.
Josephine
