what month can i move plants outside in the united kingdom?

i got to have some ready for day 1

im guessing March 20th am i close? :greenthumb:
jchap Reviewed by jchap on . what month is ok to grow outside in the uk? what month can i move plants outside in the united kingdom? i got to have some ready for day 1 im guessing March 20th am i close? :greenthumb: Rating: 5