Treasure Box Quest - Clues

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Across
  1. 3. Great month for the botanical garden
  2. 6. Pyrimidine cytosine's purine
  3. 9. gramana
  4. 12. Dirk can illuminate us
  5. 15. Sugar ____ fairy
  6. 16. Keyword for the ___
  7. 17. Where ends with ____
  8. 18. Easy Peasy _____ Sweezy is wrong
Down
  1. 1. Where starts with a base ____
  2. 2. No better support
  3. 4. Log __ for pun
  4. 5. Knows the keyword
  5. 7. best in daylight
  6. 8. box
  7. 10. A for Adenine
  8. 11. A _______ cipher
  9. 13. Corner
  10. 14. Fun with GPS and ___
  11. 19. Pay to upgrade?