Oh, give us pleasure in the flowers to-day;
And give us not to think so far away
As the uncertain harvest; keep us here
All simply in the springing of the year.
Oh, give us pleasure in the orchard white,
Like nothing else by day, like ghosts by night;
And make us happy in the happy bees,
The swarm dilating round the perfect trees.
And make us happy in the darting bird
Robert Frost spent most of his life in New England and Vermont where apple orchards and others were very plentiful.The apple orchards which Frost speaks, have white apple blosoms that look beautiful and luscious during the day. By night, they appear like white ghosts hauting the very orchards he loves. 

A Prayer in Spring