All writers are cursed to write some poetry about spring. I say cursed because it's so cliched. Well, let's un-cliche it, shall we?
Don't write about spring in general. Write about one aspect - the flowers, birds, air, sentiment of rebirth, Easter, whatever strikes you most about spring.
Try new rhyme schemes. You don't have to stick with couplets and quatrains. Try tercets or free verse or create a rhyme scheme of your own. Or use haiku, limerick, or another complex form.
Use your senses, but don't be obvious about it. Meaning, don't try to use all five at once. When writing about flowers, color and smell are obviously the most important, or shake it up and include a texture like velvety or spiny.
When tackling a big subject like Easter, try a narrative poem. Describe your celebration chronologically, from dying eggs to the cute dresses little girls wear at church to the silly string battle with your cousins to the ham catching on fire and setting off all the smoke alarms.
With something as abstract as the air in springtime, try to be as precise as possible, making comparisons to more concrete objects. Use nouns to describe, as opposed to adjectives, which tend to be more abstract.
And if you must write about spring as a whole, don't be shallow. Express some deeper sentiment, and don't let it be false.