There are many variables in hydroseeding that can vary the price that you should know about. The most important is the type of hydromulch. We have found that it is important to use 100% wood fiber hydromulch -straw on all of our jobs to hold water longer, since Colorado is a dry climate. It is also the hydromulch that anchors the seed to the ground and prevents adverse weather such as rain, hail, wind, and dry weather from removing it. The hydromulch also provides a moisture barrier to retain water and excel the germination process. Other cheap hydromulches using paper do not work as they decay completely within 2-3 weeks of application. Seed type, germination rates of the seed, and amount of seed applied also affect results. If a seeding contractor is using industry minimum seed rates or old seed, the end result will not be what you are looking for. Other ingredients such as tackifiers and polymers also play a factor as they affect the water retention and longevity of the hydromulch. Lastly, our hydroseed professionals are insured, and carry the proper water permits to use hydrants in your area.