How to Plant Blackberries in Alabama

Chose a location in full sun with soil that is well drained. Mix soil with "organic matter and a small amount of nitrogen," according to the Louisiana State University Agricultural Center. Make sure the area is free of perennial bulbs or weeds that may grow after planting your blackberry seedling. Use an herbicide to prevent growth of other plants. Follow directions on label. Wait two weeks after applying herbicide before planting your blackberry seedling.

Plant your blackberry seedling in a hole the same width as the root system. Spread its roots in the hole making sure to set the plant at the same depth it was in the nursery container. Fill the hole firmly with the soil and water immediately. Space blackberry seedlings 2 feet apart. Apply mulch to prevent weeds. Add more mulch during the winter to keep the soil and plants warm.

Fertilize after planting and after harvest season. Apply one-fourth lb. per plant of 10-10-10, according to gardener Walter Reeves. Place fertilizer 9 inches away from the stem encircling the entire area. Water the fertilizer thoroughly after each application. Make sure to read the directions on the manufacturer's label.

Water blackberries frequently during ripening season. Blackberries do not grow well with excess water around their roots, so monitor closely. Apply mulch to ensure the soil is well drained yet still moist.

Prune the canes each August after the harvest. Prune any dead leaves and canes in the fall as well.