uk outside grow what is your month of planting and if you plant autos whats your results?

I'm doing an outside grow this season i live on the south coast of the uk...my question is this as uk growers what is the month you plant outside?
im growing autos so want to kick off as early as possible and am thinking vedge from the first week in march and plant first week in April...has anyone done this and if you have what results did you get?