blueberry leaves getting reddish
I've read that when blueberries aren't getting enough acid the leaves get a bronze (or reddish) tinge. I water my blueberries with water and vinegar most of the time so I think they should be getting some acidity. But I have noticed a lot of reddish leaves on some of my plants. I don't know if this is showing low acidity in the soil or if it is a normal thing with winter approaching. Can someone set me straight on this.
These plants are in 5 and 15 gallon containers. The soil mix is 50% sphagnum peat most and 50% potting soil.