Kanuba's Space : graphics-heavy Common Lisp projects and rigorous indoor cannabis journals. Let's grow together. Zola 2025-04-09T00:00:00+00:00 https://kanuba.space/tags/vpd/atom.xml 2025-04-09T00:00:00+00:00 2025-04-09T00:00:00+00:00 Kanuba https://kanuba.space/blog/vpd-with-leaf-temperature/

<p>Many growers ship great harvests without ever looking at <abbr title="Vapor Pressure Deficit">VPD</abbr>. That’s fine. VPD is a tool, not a religion. If you do use it, you’ll get better results by basing it on <strong>leaf</strong> temperature rather than air temperature, because leaves are almost always cooler than the surrounding air when they’re transpiring.</p>