Ammi Visnaga is a more substantial version of Ammi Majus. The flowers are more domed than Majus and are also more geometric. I am on the fence as to which one I prefer…so take the easy option of growing both.
When growing Ammi Visnaga from seed, sow directly where you want them and don’t start them in pots, as they never transplant well.
As well as a spring sowing, try an Autumn sowing for a mid to late May display the next year.
As a cut flower they are amazing…they last yonks in the vase too.