does anyone knows how to get a multiflora? any kinds of it will do.

You can either mutate plants, find seed in the supplies, or breed a Ridge Ball with a Weeper or Pitcher.

Many ways, but: (any flower!)
lemonbush+ridgeball
... (if you already have one)
multiflora+multiflora (if you already have one)
self pollinate a multiflora
or vise-versa

I dunno where i got lemonbush!

the lemonbush can be made from a maple and maranta and i dont't know how to get a muliflora or a ridgball thats what i wanna know