Alabama Jumpers are actually an earthworm compared to most other worms many are familiar which are composting worms hence making them a better choice for your garden.
Composting worms usually prefer staying towards the top of the garden beds for several reasons, moisture, food availability… Another reason is many cannot take a harsh bedding such as hard packed clay, sand or even heavy dirt. Remember these are composting worms looking to devour breaking down organic matter and not dirt worms.
Now while the Alabama Jumpers also look for decaying organic matter to chow down on the surface areas, they are an earthworm which can burrow down up to 12 feet or so. They can and in fact prefer packed hard clay, packed dirt and even sandy soils to live in.
Since the compost worms basically stay towards the surface, the Alabama Jumpers also perform additional tasks to help your flowers, vegetable gardens and lawn areas grow. As they dig down deep, they leave open burrows which help to aerate the soil, allow for better water penetration through them and help promote better root growth for your plants by allowing roots to access and easily flourish throughout the burrow system.
At the same time many composting worms will not survive colder winter temperatures throughout the continental USA. On the other hand, Alabama Jumpers utilize two techniques to survive cold temperatures. In moderately cold areas they may simply burrow down to warmer soils several feet. In the colder climates the Alabama Jumpers coil up into a slime covered ball which they produce and go into a sleep like state, similar to hibernation.
Introducing your worms to the garden should not be a method of scattering them throughout. Rather using the Alabama Jumpers for instance, releasing in clumps of approximately 500 worms in a pile allowing them to dig down. Once they are down it is important to either have some decaying organic matter for them to eat in the immediate vicinity or place some material on top where you just released them. Another good food source to use if needed is Purina Worm Chow by sprinkling a little on top where you released them as needed.
The reasoning behind this method versus scattering them throughout is the fact that the worms need to be able to find each other to breed. If scattered around they will have difficulty doing so leaving you the option of buying new worms each year. By feeding the worm piles you drop into the garden you are keeping a good number of worms around to breed, lay cocoons and later on hatch.
Down the road as they become more populated the worms will begin to spread out and covering more and more territory in your yard or garden areas.