3. Keep it breezy
In order to develop strong stems that are tough enough to sustain the weight of the tomatoes, you’ll need to let your plant sway back and forth with the wind. When you plant your tomatoes outdoors, that’ll happen naturally with the breeze, but if you decide to start your seedlings off indoors, you’ll have to create some sort of air circulation system.
This can be as simple as placing them near a fan and then turning it on a couple of times a day. Let it run for a few minutes and then give your plants a few hours of rest to recover from the intense battle that they just survived.
If you have some spare time, you could also handle the job manually by stroking the tops of the tomatoes for a few minutes. It’ll take some time, and you’ll have to repeat it a few times a day, but you’ll get a nice tomato scent on you.