Dreams or visions about an apple blossom tell you about connections with the afterlife, there is also a reference to knowledge, insight and life goals that you have found or want to find.
Another explanation is the power of nature, spring, purity and cleanliness come into your life or you need it. Another possibility is that you receive support during a period of flowering in your life and this can come from believing and meditating.
A spiritual explanation is that the apple blossom reflects the higher dimensions, the universe; the connection from your deepest core and base that is being pulled to a higher level. Yet another explanation for apple blossom is opening the possibilities, insights, knowledge, life goals. But you can also think about harvesting the flowering period is now present; now is the right time.
The apple is also a representative of the pentagram and the elements earth, water, fire and air and therefore the apple tells the possibilities to change and make things in your life, so that you gain new insights that can lead to something beautiful.