How can I get them strong enough to put them outside? Thanks!
Started Seedlings Inside. How Can I Get Them to Strong Enough to Put
Certified GKH Gardening Expert
If they are getting long and floppy, they are not getting enough light. Either put them in a brighter window of move them closer to the light. Placing an oscillating fan on them will also help to strengthen them.
When you are ready to move them out, make sure to harden them off. This article will help you with hardening them off: