Dormant Oil Spray
I am planning on putting a dormant oil spray on my fruit trees (apple, pear, apricot, cherry, plum) before the buds break. Probably a few weeks left as there is still snow in places on the ground even though we've had a few days at 50-60F. Had a few questions about the choices out there:
It seems one can use a refined petroleum based oil or various vegetable based oils (soy, canola or neem) as a dormant spray. I am curious what the advantages/disadvantages of each are? Do they have a different temp range/limits. And while I probably don't need to worry about it getting too hot after I spray (low 70's F is the max for this time of year), getting cold at night is a likely possibility (it was 15F last night here). And of course how does sulfur for CAR fit in with these?