How do you get a black moon orchid on moshi monsters?

Answer 1

You can't really choose what color moon orchid you want. You'll just have to keep planting moon orchids until you get the color you want.
In your moshling garden you know how when you plant seeds they come out a color? Well, there you go! You plant a Moon Orchid and when it grows it must be the color black. If it isn't, keep trying!