Blooms that are dusted with pollen are past their prime. Exceptions to this rule include daffodils and tree blossom; these should be picked when still in bud. The warmth of your house will cause them to open quickly.
Use lukewarm or room temperature water, not cold tap water. [6] X Research source
Daffodils – while in tight bud Daisies, dahlias, marguerites - when coming into full bloom; if dusted with pollen, they’re not good to pick anymore Long flowers such as lupins, foxgloves, delphiniums – when the lower flowers are fully open with some of the upper level buds yet to open Poppies – when the buds have just burst open Peonies - when the petals begin to unfurl Chrysanthemums - when the flowers are fully open.
