My Cochleanthes in bloom and diseased

[rbarata]

I water some of my plants at night when temps go down exactly because of that. My rupiculous, for ex, as well as my anceps and tenebrosa are always watered in the early evening when temps go down and RH goes up.
One of these days I'll find a way to increase CO2 % to make it even better.

[DirtyCoconuts]

welding companies and paintball places can both sell/rent cylinders...….if you REALLY wanted to

[rbarata]

Well, I can't do it at home...the results may be catastrophic. Good for orchids but not good for me and my family.

[estación seca]

Adding CO2 to night-respiring plants doesn't help. They take in CO2 and use it to form a 4-carbon organic acid. As this happens the pH of the plant drops. When it reaches a certain point the enzymes stop working. In cacti, most have absorbed all the CO2 they can before midnight.

The next morning they use the sunlight to combine the CO2 with water. The pH rises as the acid is used up. Their pores are closed so sugar production is limited by how much they absorbed the night before. Cacti are done working for the day by about 10 am.

I've been told people can taste the difference in pH during this cycle.