The special flower for the month of August is the gladiolus – or gladioli if you’ve bunch of them.
According to The Old Farmer’s Almanac the gladiolus represents remembrance, calm, integrity, and infatuation.
The other August flower is the poppy.
A red poppy signifies pleasure;
A white poppy is given for consolation; and,
A yellow poppy wishes wealth and success.
The Interflora website explains that
August’s birth flower gets its name from the Latin ‘gladius’, meaning ‘sword’, which is why you may have heard it called ‘sword-lily’. The name in fact is a reference to the sword-swinging gladiators of ancient Rome. Back then, when gladiators literally fought to the death in the arena, the victor was showered in gladioli. It is for this reason that gladioli are said to embody strength, generosity and moral integrity.
The British Florist Association
says that Gladioli are known to symbolise strength of character, faithfulness, integrity, infatuation, and persistence. Beyond these meanings, the birth flower for August carries other meanings that differ by colours;
Red gladioli symbolises – love.
Pink gladioli symbolises – compassion.
White gladioli symbolises – innocence.
Yellow gladioli symbolises – joy.
Purple gladioli symbolises – charm and grace.
3 Sixty Five Blog 
My Grandad used to grow these for the local flower show. (Always felt they were a bit showy-offy!)
Weren’t they favoured by Dame Edna Everidge? My grandad grew them too but not for showing – just part of his somewhat random gardening style. 🌺