This year the area "didn't have a winter and had a really good autumn". Wedderburn farmer Stu Duncan said there was "plenty of moisture and plenty of grass".
"This time last year we had 30 days of 30degC. This has been one out of the box really."
Federated Farmers Central Otago high country spokesman Andrew Paterson said silage contractors were struggling to keep up with demand because of all the grass being made into feed.