Have you had any flowers develop on them yet? Depending on when you planted them and where you live maybe they are still growing and need more time.
Hi Sarah. I'm Cindy. As you may know, bees are on their way to becoming extinct. Declining numbers every year. So, I have begun to pollinate my tomato plants myself. To do this, you can either gently flick the stalks or jiggle the stalks ever so gently. Doing this will allow the pollen from one blossom to fall on another. It has made a huge difference when harvesting. I read that un-pollinated plants will yield between 10% and 15% of the plants capacity. And pollinated plants will give between 90% and 95%. That's a big difference. So, if your tomato plants are getting enough water and sunshine, try self-pollinating.