If the hawthorn appears in bloom, this represents happiness.
In Europe this tree has somewhat divergent meanings, being both chastity and fertility.
For the purpose of dream interpretation, this might mean maintaining your devotion to someone or something for a productive outcome.
Along with the oak and ash, this is a sacred fairy tree, and may represent a subconscious connection to Devic realms and messages. [1]
Dreaming of the hawthorn indicates the blossoming of fertility and creativity in your life. [2]
See also: sudden relief from worry.
The colour, White, helps considerably in this case. [4]