A little luck and bloom

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Across
  1. 3. A lucky green plant with three leaves
  2. 4. Green plants that cover the ground in spring
  3. 7. Treasure said to be at the end of a rainbow
  4. 8. Colorful arc you might see after rain
  5. 9. Weather that helps plants grow
Down
  1. 1. Feeling fortunate or blessed
  2. 2. A small Irish fairy known for hiding treasure
  3. 5. The season when flowers begin to bloom
  4. 6. A blooming plant often seen in spring
  5. 7. The color most associated with St. Patrick’s Day