Four to control now

Foxgloves

Beautiful early summer co age favourites, but can take over if not curbed.

Oriental poppies

Can appear everywhere – keep in check if a colour scheme is compromised!

Aquilegia

Prolific, tough self-seeders that you’ll notice in every pot and border gap.

Valerian

The summer stalwart of everyone’s garden – good colour but an out-and-out weed.