<span class="link_user">@Boomer911</span>, Thank you! I thought about putting fresh soil in the holes, but that would have meant getting roughly 3,5 cbm of soil, thats 3 trips with my small trailer. Also I would have needed to make a home for the 3,5 cbm of soil I am replacing. The plan is to steadily improve the soil we have. We will mulch eventually, that should help.