I would definitly put them in the ground, but dig up the dirt pretty deep and make sure the soil is broke up and loose, so that the roots can grow deep eaiser.
Good to plant in the ground but stinkbud's right... Dig up the siol in the area you want to plant and add your own mixture of soil humas peat moss... the works... this will ensure good nutrients in the soil for your plant but... beeing seen bringing these buckets of mixed soil to your location can not be good... But it will help in the long run... Airation, etc...