Treasure Box Quest -- Clues

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Across
  1. 2. sing 329.6 till it _____
  2. 5. Sugar ____ fairy
  3. 7. Great month for the botanical garden
  4. 10. Dirk can illuminate us
  5. 16. Pyrimidine cytosine's purine
  6. 17. X marks the ____
  7. 18. Where starts with a base ____
  8. 20. Fun with GPS and ___
  9. 22. Easy Peasy _____ Sweezy is wrong
Down
  1. 1. Where ends with ____
  2. 3. A for Adenine
  3. 4. Knows the keyword
  4. 6. base of this natural
  5. 8. Log __ for pun
  6. 9. A _______ cipher
  7. 11. gramana
  8. 12. Corner
  9. 13. No better support
  10. 14. Keyword for the ___
  11. 15. lower
  12. 19. treasure
  13. 21. Pay to upgrade?