Prepare the soil at least two weeks ahead of time for planting black currant bushes in early spring. Spade the soil to a depth of 8 to 10 inches, then work in 2 to 4 inches of organic matter such as compost, leaf mulch or decomposed manure.
Dig a hole for each black currant plant. The hole should be both wider and deeper than the plant's root system. Place the plant in the hole about an inch deeper than it was planted in the nursery container. Pat soil firmly around the roots. Allow a minimum of 3 feet between each plant. If you are planting black currant bushes in rows, allow at least 6 feet between each row.
Prune the black currant canes immediately after planting, leaving only four to six buds on each cane.
Water black currants at planting time. The soil should be kept slightly moist at all times, as black currants won't do well in soil that is either too dry or too soggy.
Spread two to four inches of organic mulch around the black currant plants. A mulch such as pine needles, straw or chopped bark will retain soil moisture, keep the roots cool during hot weather and keep weeds under control.
Fertilize black currants every spring, using a balanced granular fertilizer with a ratio such as 10-10-10. Apply 1/4 to 1/2 pound of fertilizer in a circle around the plant, then work the fertilizer into the top of the soil.
Prune black currant bushes every year in late winter or early spring. Prune the oldest canes, leaving about 12 canes per plant.