You can put it out when ever you have time. I need to but haven't refreshed mine in the last two seasons and they still use it on a daily basis, once the minerals are in the soil it stays active for quiet some time, they have dug it out from a small 2inch to 3inch deep and probable 1ft by 3ft hole and its now close to a foot to a foot and a half deep and about four times the size. The Di-Calcium Phosphate serves well for antler growth be careful not to use to much though it is very bitter and the deer don't care to much for the bitterness! and its always best to try getting out before it rains so it can soak in the soil make sure you cover it up with the excess dirt from digging!
