where I can buy? what kind of soil(dry or wet, soft or hard, ...) can be used to be planted? in the sunny region or not too much sun aera? Do I need to water it frequently? Thanks for any advices. 6 r- c* b& E( }* ^8 H5 k, }- {& u. g, y ; P4 R. n( H2 thave many flower in the yard but I want to cultivate some vegitable and berry.