CO2 near harvest

I have been using CO2 for a while now and have enjoyed the increase in yield. I have been stopping enrichment two weeks before harvest because it was recommended as a “flushing period.” How long before harvest should I stop using CO2, or do I need stop at all?

CO2 (carbon dioxide) is used during photosynthesis. Energy from light is harnessed to combine CO2 from the air with water and form sugar. This sugar is used to build tissue and as a source of energy.

In many plants, including cannabis, the higher the concentration of CO2 in the air, the faster and more efficiently photosynthesis progresses under high light conditions.

Since CO2 increases sugar production, it increases the growth rate. Even as the plants are maturing they continue to grow and transform tissue. Thus, keeping CO2 on during the last stages of flowering will actually hasten maturity and increase yield. Keep enriching the air with CO2 until the plants are ready to harvest.

Readers with grow questions (or answers) should send them to Ed at: Ask Ed, PMB 147, 530 Divisadero St., San Francisco, California 94117, USA. You can also email Ed at [email protected], and send queries via his websites at All featured questions will be rewarded with a copy of Ed’s new book, Best of Ask Ed: Your Marijuana Questions Answered. Sorry, Ed cannot send personal replies to your questions.



  1. Pingback: traktor farmer z przyczep¹

  2. Pingback: online purchase order software

  3. Pingback: junked cars

  4. Pingback: no appointment dentist

  5. Pingback: Fare soldi

  6. Pingback: Free Teen Chat

  7. Pingback: Creative Tinge

  8. Pingback: empresas serviços informática

  9. Pingback: Pharmacokinetic CRO

  10. Pingback: Free UK Chat

  11. Pingback:

  12. Pingback: boutique en ligne

  13. Pingback: PK Studies

  14. Pingback: Predrag Timotić

  15. Pingback: Array Questions

  16. Pingback: loker cpns guru 2018