Significant plantings have been happening across the south of the country with a number of farmers contract growing vines for some of the major English producers. Farmers are looking at the potential benefits of growing vines, as the return per tonne for grapes over more traditional crops are not to be ignored. A field of wheat might yield 3 tonnes per acre at around £120 per tonne. Growing grapes could yield 3 to 4 tonnes per acre at around £950 to £1100 per tonne. One concern is that growers need to invest money for no initial return, as crops tend to come in the third or fourth year. Another concern is that grape production in the climate is highly variable: "In England, it is only in about 2 years in every 10 that grape production will be really good, 4 years will be average and 4 years poor or terrible – largely due to weather and/or disease exacerbated by weather." However English vineyards share in common European weather patterns, so 2006 was a bumper year, 2007 saw ripe grapes but low volumes, 2008 was very poor, but both 2009 and 2010 were good years. 2011 was average, 2012 dreadful, and 2013 good. Total British cereal production is not so variable.