How to Pot Up Your Tomato Seedlings (2024)

How to Pot Up Your Tomato Seedlings (1)

by Isabel Vinton

Once your tomato seedlings are 2-3 inches high and the first set of true leaves are just starting to emerge, it's time to prick the individual plants into bigger pots, preferably the ones they will live in until transplant time. Potting up is also a great way to buy extra time in the garden. For example, if you have a particularly wet spring, you may want to delay transplanting your tomatoes into the garden since it's bestto avoid working the soil when it's muddy. Wet soil compacts more easily, transplants don't like to be waterlogged, and seeds can drown.

We made this short How-To Pot Up Tomato Seedlings video so you can see a bit of our seed farm, our hoophouse, and see first hand how we take care of our little seedlings until they can sink their roots into cozy beds.

Summary:

1. Place potting soil in bottom of larger container.

2. Remove tomato seedling from tray.

3. Remove lower leaves and gently loosen roots.

4. Place in container.

5. Fill in with soil. Soil should cover first 1-2 inches of tomato stem (you can also bury tomatillos in this same way, but other seedlings should be potted up at regular depth without being sunk into soil).

6. Water in.

7. Don't worry if your seedling looks droopy at first. It will perk up!

8. Keep seedling outdoors (after hardening off) or in green house.

9. You've just bought yourself 1-2 weeks before you need to transplant.

10. Transplant into garden deep enough to cover another inch or so of green stem.

How to Pot Up Your Tomato Seedlings (2024)

FAQs

How to Pot Up Your Tomato Seedlings? ›

Repotting is best done when the seedlings have at least one set of true leaves or when the roots filled up the container they are currently growing in, you can check the pots at the drainage holes and you will see tiny white roots, it means it is time to repot the tomatoes.It also helps strengthen roots and prevent ...

When should you transplant tomato seedlings into bigger pots? ›

Repotting is best done when the seedlings have at least one set of true leaves or when the roots filled up the container they are currently growing in, you can check the pots at the drainage holes and you will see tiny white roots, it means it is time to repot the tomatoes.It also helps strengthen roots and prevent ...

How do you get tomato seedlings to stand up? ›

Bury the Stem

Gently bury the leggy stem of the tomato seedling up to the first set of true leaves. This will encourage the plant to grow new roots from the buried part of the stem, and the buried part will eventually become a strong part of the stem.

How deep to bury tomato seedlings? ›

Plant Tomatoes Deep, Deep, Deep. Each Bonnie tomato label urges you to plant tomatoes deep, so that a full 2/3 of the plant is underground. That means that if you buy a 10-inch tall plant, all but the top three to four inches is buried.

How big should tomato seedlings be before planting in ground? ›

Most tomato seedlings are ready to move from the seed starting trays and into a larger container when they are three to four inches tall and have three or more sets of leaves. They should be transplanted into a larger container at least four weeks before planting outdoors so the root system has a chance to develop.

What size pots for potting on tomato seedlings? ›

Make sure you choose a pot that's wide enough and deep enough for the transplants. A 4-inch diameter pot that is 3-4 inches deep is usually adequate. Don't forget to fertilize your seedlings regularly with a water-soluble fertilizer such as Plant Health Care for Seedlings.

How big should seedlings be before transplanting into pots? ›

Seedlings should be at least 2-3 inches tall before transplanting and should have their two "true leaves."

What do tomato seedlings look like when ready to transplant? ›

Tomato seedlings are ready to transplant when they have their first set of true leaves. #1 Wait at least three weeks as your tomato seeds germinate and grow their first set of true leaves. At this stage they are ready to move up to a bigger pot.

How long can seedlings stay in trays? ›

Typically, your seeds will stay in their seed tray for 4-6 weeks. After this period, you will either need to transplant the new seedlings into larger pots or transplant them outside. Check your seed instructions and pay attention to your frost dates before transplanting young plants outside.

How do I get my seedlings to grow strong roots? ›

Pot On Promptly

As soon as the seedlings have one or two sets of true leaves, separate them and transplant into 2-inch modules, using potting compost which is warmer and softer than the seed compost. By doing this early, your plants are likely to achieve more stable stems and better root growth.

What is the best way to raise seedlings? ›

When growing your own seedlings in pots or punnets, place them in a warm, brightly lit wind protected spot. Keep the seed raising mix consistently moist, but not wet. Seedlings can be transplanted into their final position once they're large enough to handle.

How do you make tomato seedlings stocky? ›

Instead, I use the transplanting method for tomato seedlings, burying their stems so that only the leaves show above ground. The underground stems grow more roots, and the aboveground stems grow stocky and well-behaved.

How do I speed up tomato seedlings? ›

Soaking the tomato seeds before sowing not just speeds up germination by days but also the seedlings will grow more vigorously, the above study found.

Should I pinch off the tops of tomato seedlings? ›

Pinching out your tomatoes is an essential part of tomato plant care. The reason for this is the tomato plant is a naturally bushy plant, and if you let it grow as it wants to, it will put all of its focus into growing foliage at the expense of fruit.

How many tomato seedlings per pot? ›

Hoggard suggests planting just one tomato plant in each pot for best results. Fit each pot with a sturdy cage to support the plant.

How do you transplant tomato seedlings from seed trays? ›

With a transplanting dibber or spoon, lift the young plants out of the soil, only grasping them by the cotyledons. Place the tomato plants in pots 8 – 12 centimetres in diameter filled with nutrient-rich soil. Plant the seedlings up to the base of the true leaves.

Do tomato plants grow better in the ground or in a pot? ›

In general, determinate tomatoes tend to do better in pots, so look for those. It's also possible to grow indeterminate tomatoes in containers, of course, as long as you provide enough support and soil volume.

References

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