Fertiliser prices - a key input cost for farmers - are on their way up.
The international price for DAP - the product that combines ammonium and phosphate - have been bouncing off a low point as major world producers slowly respond to increased demand.
"It's been low for a while and at those low prices, manufacturers around the world - the big players - probably were not making a lot of money," a spokesman for fertiliser co-op Ravensdown said.
"So we are seeing a controlled, disciplined rise, because demand tends to go up in places like Brazil and India at this time of year," he said.
America had an unusually wet season last year, which made for poor growing conditions and lower demand.