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. * H$ r5 N. \8 r I5 g! H " v3 t v6 V; W! I9 ]; V5 xhave many flower in the yard but I want to cultivate some vegitable and berry.