Page 3 of 3 FirstFirst 1 2 3
Results 21 to 21 of 21

Thread: Help me understand VPD

  1. #21

    Join Date
    Nov 2017
    Location
    De Pijp
    Posts
    10,915
    Thanks
    28,179
    Been Thanked: 46,725 Times

    Default

    Quote Originally Posted by THCBrova View Post
    Which reading do I reference on the vpd chart?

    Room 25°
    RH 50%
    Room vpd 1.59 kpa

    Leaf temp 24°

    Then its got:

    Leaf vpd 1.40 kpa

    But can obviously only match one to the vpd chart, unless I match the 2 numbers of course.
    A chart is for a specific temperature difference between leaf and air. You get a chart for each difference, like 0,-1,-2,-3 etc

  2. The Following User Says Thank You to gardro For This Useful Post:

    GEORGE (09-01-21)

Page 3 of 3 FirstFirst 1 2 3

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


THCtalk.com Disclaimer - You must be over 18 years old to view/use this site .THCtalk.com does not encourage growing Cannabis or possessing Cannabis. Learning how to grow Cannabis instructions should be for educational purposes only. All Information contained in this web site is for: Historical reference, Scientific reference and Educational purposes only. Visitors to this website are advised against breaking the law as It is illegal to smoke, grow, or possess cannabis in the UK and some US States