New blueberry leaves reddish at this time of the year?
I have several newly planted blueberry shrubs. They are all in containers and will be there until the coming Fall when I can clear out some old landscaping shrubs to put these in ground. They are all Southern Highbrush variety (and recommended ones for my zone). They were bought with no leaves on them (looked like twigs and 1.5-2 ft tall), in 1 gallon pots in december '09. I planted them in 5 gallon pots in early january. I used a mixture of potting soil, peat moss, perlite and a little bit of garden sulphur (espoma brand) in each container. Half my blueberries are sprouting red leaves and the others are sprouting green leaves. The weather here is warm and feels like spring (though the rains have been soaking us for the past month). Why are the leaves reddish? I thought that the leaves turning red are a Fall phenomenon? Do my plants have diseases?
PS: I am waiting for the actual spring start date to apply any fertilize.