Is this curly top virus?
Older leaves are purple underneath and very stiff/leathery. Bottom of the stem is also purple. The older leaves are also much, much darker than new geowth. New growth, however, feel perfectly fine. It doesn't look like the typical curly virus pictures I see online. It also started curling under like this as soon as I began hardening it off in 60-70 degree weather. It would curl after bringing it into the house and then slightly uncurl after being outside. I don't think it's a P deficiency as I regularly feed it with bat guano and ocassionally miracle gro. Any ideas? I water when it's get dry or wilted.