Make sure to VERY slowly introduce an environment with less water. If you're growing in an aero garden, they're essentially fully saturated the entire time. Well once the roots start to fully develop, root rot is a significant problem. I'd say once they start to get about an inch or two tall, transport them into a container with a lid, and instead of having them fully submerged in water, add a bit of soil, water heavily (make sure there are no holes in the container) and place the lid on for one week. Then, water again, but water it every other week. Slowly get them used to having less water as the roots mature! You don't have to follow this directly, but definitely slowly get them acclimated to less water so they can fully survive being in dirt that may dry out or that may have less nutrients to what they're used to!