If they wilt after you transplant them, make sure you water them well and move them away from the light for a day. It can be a little stressful on the plants especially if you missed some waterings. When you’re transplanting tomato seedlings into bigger pots, you will sometimes notice that they wilt after you move them. ⑨ Water it well and set it back under the lights. You want to remove any air pockets in the soil. ⑧ Fill in around the seedling with soil mix and press firmly. Pinch off any leaves that will be buried. ⑦ Tomatoes like to have their stem buried, so put your seedling in as deep as you can with at least 1 set of true leaves above the soil surface. ⑥ Set your seedling into the hole in the soil in the new container. Pinching the stem can damage the vascular supply in it or even kill your seedling. ⑤ Pinch two of the true leaves together and pull to lift your seedling out of its container. It’s easier to remove seedlings from seed starting trays when they’re dry, so don’t water just before you transplant. If there’s a hole on the bottom poke a pencil up there or gently squeeze around the container to help it slip out. ④ Loosen your seedling from its container. ③ Fill the new container with your soil mixture and make a hole in the center nearly down to the bottom.
Wet it until it is evenly moist and holds its shape when squeezed in your hand. ② Fill a bowl or bucket with a 50:50 blend of seed starting mix and potting soil.
Your seedling should have a good inch of space all around it when it’s in its new home. ① Get a container at least twice as large as the original container. You can still save them by transplanting, but the longer they stay in their starting container the more they’ll struggle. If you realize you’ve waited too long, don’t worry. Waiting too long to transplant seedlings can lead to yellowing of the leaves and roots that grow around the edges of the container and even out the holes. Depending on the variety, they can be 2-4 inches tall at this stage. Tomato seedlings are ready to be transplanted when they have their first set of true leaves or at least 2 sets of leaves. So transplanting helps the seedlings build a stronger root system which makes for healthier plants in the garden. The transitioning in soil type and container size encourages root growth. We don’t want them to stay in that until planting, so we transition them from the soilless mix to potting soil to garden soil.
We start seeds in a soilless mixture that contains no nutrients. There’s no fertilizer in germinating mix. When we start in a 128 cell tray, we can fit more plants in less space which is convenient for placing them on heat mats and under lights. It’s easier to get ideal temperature and moisture conditions for starting tomato seeds in the small cell trays. There are several reasons why we make the extra effort to start our seedlings in very small containers and repot them at least once before they go out into the garden. Transplanting seedlings doesn’t take very much time, and it’s super easy to do. To some, it may seem like an extra step, but transplanting tomato seedlings actually helps them develop a stronger stem and root system.
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