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Early Sexing Cannabis

It is possible to tell the sex of a plant early, and thus move male plants out of the main growing area sooner by covering a plant is lower branch for 12 hours a day while it is in a constant light vegetative state. Use a black paper bag or equivalent to allow for air flow while keeping out light. Be sure to set up a regular cycle for these covered branches. If light is allowed to reach them during the dark period, they may not indicate early at all.

Use a magnifying glass to look at the early flowers sex type. A male plant will have a small club (playing card) looking preflower with a small stem under it. A female flower is usually a single or double pistil, white and wispy, emerging from an immature calyx.

Some people like to pre-force plants when they are 8" tall, in order to weed out the males. When growing outdoors, many growers do not wish to devote time, space or energy to male plants. Just put the plants on a 12 hours light cycle for 2 weeks, separate the females from the males, then revert the light cycle back to 18-24 hours to continue vegatative growth for the females. Keep in mind, this is a time consuming process and can put the plants back 2 weeks in growth. Do not pre-force plants unless you have lots of time. Just cover one branch per plant with black paper (light tight, breaths air) 12 hours every day under constant light to force pre-flowers and differentiate early.

  1. Genetics and the plant
  2. In & outdoors - strategy
  3. Planting indoors
  4. Shelf growing
  5. Light
  6. Sea of green
  7. Germination
  8. Vegetative growth
  9. Flowering
  10. Hydroponics
  11. Recycling
  12. Planting outdoors
  13. Guerrilla gardening
  14. Soil growing
  15. Security
  16. Plant food and nutrients
  17. Ph and fertilizers
  18. Co2
  19. Venting
  20. Temperature
  21. Cannabis Pests
  22. Transplanting
  23. Early sexing
  24. Regeneration
  25. Harvesting and drying
  26. Cloning
  27. Breeding
  28. Sinsemillia
  29. Cannabis seeds
  30. Odors and negative ions
  31. Oxygen
  32. Safety and privacy
  33. Distilled water
  34. Birth control pills
  35. Seed and bud storage
  36. A final comment

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