In fact, Gnome, my garage is heated. Good for seedlings. I guess I can move the plants to the porch to keep them cold. Is it safe to do that if it goes below freezing? So, Opa ... allelopathic? I learn a new word every day here!
Yes, I researched it, but of course, I have no idea what kind of pine trees those are in our woods. Most of the discussion on pine needles and allelopathic properties had to do with making the soil acidic, and that this is bad for alkaline loving plants, but I think it's good for blueberries, right? I guess I'll find out! Thanks, all.