Read our affiliate disclosure here.

Why Has My Tomato Plant Stopped Growing?

Since 2010, Tomato Dirt has garnered 4.8+ million views, making it the web’s leading online source for growing tomatoes in the home garden. Award-winning writer and Tomato Dirt owner Kathy Widenhouse has helped thousands of home gardeners grow healthier tomatoes. Be one of them when you get Tomato Dirt’s Growing Guide here.

Posted 7.11.26

Your tomato plant started the season strong – plentiful leaves, branches and blossoms, with gobs of new fruit.

But now, it looks exactly the same as it did several days ago. And you're wondering, "Why has my tomato plant stopped growing?”

It's one of the most common questions gardeners ask every growing season.

The good news is that a tomato plant that appears to have stopped growing isn't necessarily dying. It’s responding to weather … shifting its energy to fruit production … growing in ways that are harder to notice.

Let's look at the most common—and some surprising—reasons tomato plants stop growing, along with what you can do to get them growing again.

But first ...

Has your tomato plant stopped growing for real?

But before assuming something is wrong, take a closer look. Your tomato plant may still be growing if you notice …

• New leaves that are unfolding at the top.
• Flower buds that are developing.
• Tiny tomatoes that are increasing in size.
• Stems thickening.
• Side shoots (suckers) that are forming.
• Roots expanding underground.

Many gardeners focus only on height, but tomato plants grow in many different ways.

Sometimes the plant has simply shifted its energy to branching out or to ripening fruit.

23 reasons your tomato plant isn’t getting bigger – and what to do about it

Take a look at these signs that may indicate why your tomato has stopped growing … and what you can do to help it along.

1. Your tomato plant is putting energy into fruit

One of the most common reasons your tomato plant seems to have stopped growing is actually a good sign.

Once tomatoes begin forming, the plant redirects much of its energy toward enlarging fruit, ripening the tomatoes, and producing seeds. As a result, its vertical growth often slows considerably.

Solution: You don’t need to take any action. Continue watering and fertilizing consistently while the plant focuses on producing fruit. Soon you’ll enjoy picking!

2. You're growing a determinate variety

Not all tomato plants continue growing indefinitely. Determinate tomatoes grow to a predetermined size before slowing dramatically. After reaching maturity, they produce flowers and set fruit. Then, much of their crop ripens over a short period – like a couple of weeks.

This is completely normal … in fact, it’s what determinate tomatoes are designed to do. Determinate varieties allow you to can or freeze a large amount of fruit at one time – or make a few gallons of sauce.

Solution: If your plant is healthy, simply continue caring for it until harvest.

3. Cold temperatures slow growth

Tomatoes are heat-loving plants. When temperatures drop below about 55°F (13°C), your tomato plants conserve their energy … which means they stop putting out new branches, leaves, and blossoms. Even if you don’t get frost, chilly nights can temporarily slow their development.

Solution: Protect your plants with row covers, frost blankets, or garden cloches. And don’t despair. When warm temperatures return, your plants will perk up and grow again.

4. Excessive heat can pause growth

Temperatures above 90–95°F can also slow tomato plants. Extreme heat stresses them. Leaves get sluggish (like we do in the heat) and the process of photosynthesis slows. That means less sugars are flowing through your plant’s leaves, branches, and stems – and less energy means less growth. In fact, flowers may drop before producing fruit.

Solution:  Water deeply – and make sure there’s a healthy layer of mulch around your plants so they can retain as much moisture as possible. Provide temporary afternoon shade during heat waves. Your plants will start growing again when temperatures moderate.

Use this Quick Fix Cheat Sheet to find and fix tomato problems.

5. The plant is recovering from transplant shock

Recently transplanted tomatoes often pause growth. They’re trying to adjust to their new home! Instead of producing leaves, they're busy rebuilding damaged roots. Give them 1-3 weeks to make this transition.

Solution: Avoid fertilizing heavily during transplant shock. Too much of a good thing can damage tender roots. Keep soil evenly moist and be patient.

6. The soil is too cold

Even when daytime temperatures feel warm, cold soil can prevent root growth. Without active roots, the rest of the plant slows down.

Solution: Wait until the soil warms naturally before planting. Or use black plastic mulch early in the season to warm the soil.

7. Not enough sunlight

Tomatoes require at least six hours of direct sun, although eight or more hours is even better. Plants grown in shade often become small, leggy, or simply grow slowly.

Solution: Move container tomatoes to a sunnier location. Or remove sources of shade blocking the sun from your in-ground garden – trim branches or take down a fence, for example.

8. Underwatering

Is your plant thirsty? It needs 1-3 inches of water per week. Dry soil forces plants into survival mode, which means they slow their growth to conserve water. Check to see if your plant’s leaves wilt during the hottest part of the day and then recover. If so, they need more water.

Solution: Water deeply whenever the top inch or two of soil becomes dry.

9. Overwatering

Is your plant drowning? Roots need oxygen as much as they need water. Waterlogged soil suffocates roots, preventing nutrient uptake. Your plant will stop growing.

Solution: Allow soil to drain between waterings and improve drainage if necessary.

10. Poor soil

Tomatoes get hungry very fast.  Poor soil lacks the nutrients they need for vigorous growth.

Solution: Create and maintain a tomato fertilizing schedule. Add compost, a balanced fertilizer, well-aged manure, or worm castings to your soil.

11. Too much nitrogen

This problem can be confusing. Too much nitrogen doesn't always stop growth.

Instead, plants often produce huge amounts of leaves while delaying flowers and fruit. Leaves may be deep green … but there are few or no blossoms and fruit.

Solution: Switch to a fertilizer formulated for tomatoes once flowering begins (such as Tomato Tone). It will have higher amounts of phosphorus and potassium than nitrogen.

12. Nutrient deficiencies

Missing nutrients can slow or stop growth. Your plant may have more than a few yellow leaves. Tomato plants need nitrogen, phosphorus, potassium, magnesium, calcium and iron to keep growing and produce good crops.

Solution: Conduct a soil test to determine your soil content and then use the results to identify deficiencies – which you can replace with soil supplements.

13. Roots have filled the container

Container-grown tomatoes eventually become root-bound. Roots circle inside the pot instead of expanding. You may even see them peeking out of the bottom holes. And of course, your tomato plant stopped growing, too.

Solution:  Move plants into larger containers with fresh potting mix. Their root systems will have room to stretch out soon, which can jumpstart your plants’ growth.

14. Compacted soil

Roots can’t grow through rock-hard soil. Shallow roots struggle to gather water and nutrients. This is particularly a problem where clay dominates your soil mix.

Solution: Add compost to improve soil structure. Avoid walking on planting beds, too, so you don’t compact the soil further.

15. Diseases

Many diseases reduce plant vigor long before obvious symptoms appear. Early blight, Fusarium wilt, Verticillium wilt, bacterial wilt – once infected, the plants won’t recover.

Solution:  Remove and destroy severely infected plants. Rotate your crops so those nasty fungi don’t reappear on next year’s plants.

16. Insect damage

Some insects damage leaves, while others attack roots. Heavy infestations reduce photosynthesis and slow growth.

Solution: School yourself to check plants daily to look for aphids, whiteflies, spider mites, flea beetles, and cutworms. Then you can treat problems early and avoid a full-scale invasion.

17. Root damage

Digging too close to tomato plants can damage its roots. Perhaps you’ve tried to work extra compost or fertilizer into the soil. Even aggressive weeding may injure them. But damaged roots can't efficiently absorb water or nutrients … so your tomato plant stopped growing.

Solution: Pull weeds carefully. Avoid cultivating too deeply around tomato plants once they’re in the ground, but work fertilizer and compost gently into the soil. Save deep cultivation for early in the season before you plant.

18. Herbicide drift

Maybe you’ve treated your lawn with weed killer. Or your neighbor used a spray poison on a day with a bit of a breeze. Tomatoes are extremely sensitive to herbicides. Even tiny amounts drifting from nearby lawns can stunt growth. You’ll see twisted leaves, distorted stems, curled new growth – even some white spots in the center of dark leaves.

Solution: Prevent future exposure and remove severely damaged plants if necessary.

19. The plant is busy growing underground

One reason tomatoes seem to stop growing is that they're investing in their root system. Although you can't see it, plenty of growth may be happening below ground.

Healthy roots support taller plants, larger harvests, and better drought tolerance.

Solution: Check all the other reasons your tomato plant stopped growing before you panic.

20. The plant is thickening instead of growing taller

Height isn't the only measure of growth. As plants mature, they often develop thicker stems, stronger branches, and additional leaf clusters.  These changes help support heavy fruit later in the season.

Solution: Look for the ways your plant is growing out as well as up.

21. The variety is slow-growing

Some heirloom tomatoes simply grow more slowly than hybrid varieties. Large-fruited tomatoes often require more time to mature than cherry tomatoes.

Solution: Know your variety's expected days to maturity before worrying.

22. Pruning shock

Did you give your tomato a severe haircut? Leaves are the plant's food factories. Without enough foliage, growth slows while the plant recovers.

Solution: Prune gradually rather than removing large portions all at once.

23. The plant is nearing the end of its life cycle

Late in the growing season, tomato plants naturally begin slowing down.

• Leaves may turn yellow.
• Growth declines.
• Fruit ripens.

This is simply part of the plant's life cycle.

Solution: Enjoy the ride as long as you can.

Less common reasons your tomato plant stopped growing

Sometimes your plant slows down, but the reason isn’t obvious. Consider these.

• Soil pH that's too high or too low.
• Excess salt from repeated fertilizer applications.
• Root-knot nematodes.
• Black walnut toxicity (juglone).
• Constant strong winds.
• Heavy competition from nearby trees.
• Poor-quality potting mix.
• Watering with softened water high in sodium.
• Repeated physical damage from pets or wildlife.

These problems are less common but can significantly affect growth.

Use this Tomato Growing Planner step-by-step all season.

How to tell if your tomato plant is still healthy

A tomato plant is probably healthy if you see:

• Bright green leaves.
• Firm stems.
• New flowers.
• Small developing fruit.
• No spreading leaf spots.
• New growth at the tips.

Even slow-growing plants can still produce an excellent harvest.

How to encourage growth again

If your tomato plant has truly stopped growing, try these steps:

1. Check soil moisture.
2. Make sure the plant receives full sun.
3. Feed with a balanced tomato fertilizer if nutrients are lacking.
4. Add compost around the base.
5. Mulch to stabilize soil moisture.
6. Inspect carefully for insects and diseases.
7. Avoid damaging the roots.
8. Remove weeds competing for nutrients.
9. Be patient during periods of extreme weather.

Often, correcting one simple issue is enough to restart healthy growth.

“My Tomato Plant Stopped Growing”: Frequently Asked Questions

Q. Why did my tomato plant stop growing after flowering?

Once flowering begins, tomato plants redirect much of their energy toward producing fruit. Slower stem growth is often completely normal.

Q. Can tomato plants start growing again?

Yes. If the cause is temporary—such as cool weather, transplant shock, or inconsistent watering—plants often resume vigorous growth once conditions improve.

Q. Why is my tomato plant alive but not growing?

The plant may be experiencing stress from poor soil, insufficient sunlight, cold temperatures, compacted roots, or nutrient deficiencies. It may also simply be putting more energy into developing fruit or its root system instead of growing taller.

Q. Should I fertilize a tomato plant that stopped growing?

Only if the plant actually needs nutrients. Overfertilizing can create new problems. Are you using a regular tomato fertilizing schedule? If not, consider it. And a soil test is the best way to determine whether nutrient deficiencies are limiting growth.

Q. How long should tomato plants keep growing?

Indeterminate tomato plants continue producing new stems, leaves, flowers, and fruit until frost or disease ends the growing season. Determinate varieties naturally stop getting larger after reaching their mature size.

Your tomato plant stopped growing? Here’s the dirt

If your tomato plant seems to have stopped growing, don't panic. In many cases, nothing is wrong at all. Tomato plants naturally slow their upward growth as they establish roots, develop flowers, or fill with fruit.

When growth truly has stalled, the cause is often something you can fix.

Go through this list.

Then take the most logical step to help your tomato plant recover. Often, it’s one simple change that allows your plant to continue producing healthy growth and a rewarding harvest.

---

More Tomato Growing Tips

Use This 6-Step Checklist for Tomato Plant Care ...

How to Increase Flowering in Tomatoes ...

10 Tips for Growing Tomatoes in Hot Weather ...

The 6 Tomato Growing Stages Explained ...

How To Make Tomato Plants Grow Faster ...

Green Tomatoes: A Gardener’s Q & A ...

Growing tomatoes: top 4 areas of tomato plant care ... 

Get more tips on our Tomato Growing Tips Pinterest board...

Return from My Tomato Plant Stopped Growing to Tomato Dirt home

As an Amazon Associate and Rakuten Advertising affiliate I earn from qualifying purchases.

SHARE THIS PAGE: