Dirt is an unsplicable solid connecting basic foreground block. Multiple layers of this block can be found naturally-generated in normal worlds. Below is a list of trees which can possibly be made by splicing a Dirt Seed with another seed.
Rainbow Wings! It is 45 Wls in Growtopia but it very unique it is when jump have rainbow particles come out of it to get is need to put ruby seed with emerald seed together it is 250 days to get this wings I think... Rarity 248!
Skeleton Dragon! It is it I think... 540 Wls. To make it drop 20 Red Dragons In growganoth 1 by 1 and need 10 tiny skulls. This are very awesome it shoots out green fires I think... It very limited for only this Halloween time (Growganoth)