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. * t% X$ b3 t" Z! g! E 1 }4 t* w9 }# [5 b9 U: u$ v3 g8 vhave many flower in the yard but I want to cultivate some vegitable and berry.