Experts and BHG readers answer.
leaves are hanging on tomato plants
It's time to move the plants outside. But you'll need to do so gradually to harden off the plants. Move them to a shaded location out of direct sun and wind for an hour or so the first day. Gradually increase the amount of time outdoors so they acclimate to the harsher conditions. After a week or 10 days, they should be ready to take full sun.