Certified GKH Gardening Expert
There are a few different ways of going about this.
You can transplant them now, which will make it easier than when the roots get tangled together, but you may lose more than letting them mature some.
Letting them mature some means that they will likely be tangled together, which will defeat the purpose of cultivating them since it will ultimately take longer to grow and repair damaged root ends.
In my opinion you should go ahead and transplant them out very carefully. They won't want to move much once they get established. You may lose a few, but this will be the idea of planting more than you need.
Thank you for the info!