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Across
  1. 5. canopy
  2. 6. secateurs
  3. 8. formative
  4. 10. thinning
  5. 12. shearing
  6. 15. collar
  7. 17. loppers
  8. 18. heading
  9. 19. bypass
Down
  1. 1. competing
  2. 2. vigour
  3. 3. lateral
  4. 4. corrective
  5. 7. leader
  6. 9. apical
  7. 11. wound
  8. 13. health
  9. 14. axillary
  10. 16. as4373
  11. 20. saw