Is Easter more often in March than April? Eggs and bunnies would be good then. If you want to steer clear of religious themes you could use the general "new life" idea - lambs, chicks, daffodils. Or wind - we often have it gusty in March. We don't do much for St Paddies, but as I'm group 2 for page kits don't let that worry you if you're in group 1!
leaves is good for me BTW - plenty of them in my garden, especially big cherry leaves. SPOILER ALERT - I used leaves for my Liberty Tree Tavern recipe.
I'm thinking that Easter is mostly in April. I think its in March next year but for the last couple its been April (I think). If people wanted I could do Easter though so thats another thought.