Glossary
VPD
Growers call it a measure combining temperature and humidity that describes how easily a plant can breathe. Growers say that when the night reading is too low, a cactus cannot open the small openings in its skin, cannot exchange gases and stops growing, and that this is also why plants stall in extreme heat.
Is this wrong, or missing something?
Send a correction. It is checked before it goes on the page, so nothing changes straight away.
Send a correction →Sources
Learned from the sanpedrocact.us community wiki (CC BY-NC 4.0) and from @sanpedromastery6262 on YouTube.
Every photograph in the yard pages and the shop is of a plant grown here, except where a listing says it was grown by somebody else — it says so on the listing, above the price.
Every source behind these pages →