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[caguama]

I noticed my P. Viridis has some sort of infection/pathogen on some of it's growth. I performed a search but was not able to find other threads with this type of infection that I am seeing. I'm not well versed in plant pathology, especially with PV. What do you think it is and how should I proceed to treat it? Thank you.

Caguama

[Bach]

What kind of temperatures are your plants exposed to, high and low?  And how much humidity?

Without knowing your conditions I would hazard a guess that the temps are too low for those small plants.  Also some nute deficiency going on. Give me specifics though and I can make a more accurate guess.

[caguama]

Temperatures are averaging around mid 70's in the day and low in the in 50's evenings. The plants are in an unheated greenhouse. If the temperatures are a problem, what would be a great way to heat the greenhouse (without some electrical device)?

As for humidity, I'm not sure and I spray the greenhouse with water mist. Perhaps a thermometer that can measure humidity would come handy.

[Bach]

Yeah for plants that size regular temps in the low 50's will cause them to look like that. Perhaps adding something to provide thermal mass to the GH would help.