I asked a similar question recently and apparently only the Opium poppy seeds can be eaten.
I bought a packet of Shirley mixed poppy seeds which should 'fit the bill'. A nice range of pastel shades of flower also!

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My Majesty made for him a garden anew in order
to present to him vegetables and all beautiful flowers.- Offerings of Thutmose III to Amon-Ra (1500 BCE)