Jamie,

Great on the blueberries. Just remember to fertilize them with a acidic fertilizer and never with a fertilizer that contains Muriate of potash.

Can't be much help on the grapes as they are new to me. I planted a few grapes last fall and the rest a few days ago and currently have 10 different types growing. Eight of them are muscadines and 2 are bunch grapes that are pierces disease resistant.

What BR said is crucial: plant muscadine grapes or bunch grapes that are resistant to Pierce's disease. If you plant non-resistant grapes, they are likely to die within a few years. Also, make sure they get full sun and good air circulation - they will grow better, produce more, and have less disease.

Here is a link that might be useful: IFAS - Recommended Bunch Grape Varieties for Florida