Write the next sentence in this paragraph:

How to grow elderberries
Prepare the soil.
The best soil for elderberries is free-draining and fertile.
Add compost and work through the soil.

Options are: 1. The compost will help strengthen the roots and prevent the plants from dying. Soil surrounding the plant becomes the root of the plant.; 2. Till to a depth of 4 to 5 feet (1.8 to 2.4 m). Remove, if necessary, topsoil compost.; 3. Ensure good drainage; elderberry doesn't like waterlogged soil. Propagate an elderberry in the early spring.; 4. Plant around 60 berries in the compost mix three to four weeks before your due date. Before planting the elderberries, you should mulch.;
3.