This is one of the most important questions you should ask when finding an aeration provider because you want to find a company that uses high-quality seed. Terms such as coated, seed boost, multi-blended, and weed-free are indicators of high-quality seed.
Any weed contamination, even 0.01%, will introduce thousands of weeds to your lawn. A company using clean seed may be more expensive than other options, but it is worth the investment. At Blades of Green, our seed is weed free and coated to improve germination rates.
If they use a specific name brand, purchase their seed at a box store, or are unsure, you may want to look elsewhere.