Cucumber cotyledons with white spots
I planted some cucumber seeds in Jiffy mix indoors March 30 and they are doing well except I have started seeing some of them with white spots on the cotyledons.
They are under lights 16 hours and have a fan on them on low about 8 hours.
The spots aren't powdery and they have air flow so I would think it wasn't powdery mildew at this stage.
Search came up with nothing.
Any ideas? Nothing to worry about?