Think Like a Tomato Plant: What Your Tomato Plants are Trying to Tell You

Welcome to the Think Like a Plant series. This is a new collection of vegetable growing articles designed to help you think like a grower by understanding the plants you grow. Instead of simply following gardening instructions, this series explores what vegetable plants, like tomatoes, actually need to grow well, stay healthy, and produce strong harvests. Once you understand what a tomato plant wants, from warmth and watering to light, airflow, and nutrients, you can garden with more confidence, spot problems earlier, and make smarter growing decisions in your garden or greenhouse.

What does my Tomato Plant actually want?

Try thinking like Tomato plant by observing their behaviour, notice patterns when growing them like how much water they need and try to understand what the plant is trying to achieve.

Tomato Plants No 1 Goal

‘Grow strong enough to produce fruits and seeds’

Here are the steps that the Tomato Plant takes to achieve this goal:

• Leaves absorb sunlight to produce energy for the plant to grow,
• Stem reaches towards the sky towards light and warmth,
• Roots go straight downward into the soil searching for water and nutrients,
• Flowers develop so they can be pollenated and turned into fruit.

Everything living has a good or bad phase, a ying or yang if you will.

If the Tomato plant has all the above working well, and conditions are good, the plant grows confidently.

However if the Tomato plant has poor conditions, like little sunlight, no warmth, not enough nutrients or water, then the plant becomes stressed.

We as gardeners, or care givers will need to pick up on these plant stressed signals so we can swing the conditions back to favourable. This way the plant grows confidently and ultimately grows lots of tomatoes for our harvests! It’s a Win, Win.

Think Like a Grower – Warmth

We all know Tomatoes are warm loving plants, and this is because they originally grew in warmer climates in South America. They are not used to UK weather which can sometimes stress them out. Sometimes our UK weather stresses us out, so we should know what it feels like!

A Tomato Plant wants:

• Warm Soil – Plant outside after Mid May as April soil in the UK is too cold. If growing in a greenhouse, it’s warming up in the UK in May, so plant into their final positions.
• Consistent Temperatures – This is a difficult one in the UK as our weather & temperature can vary in one day, let alone one week. A greenhouse environment can provide consistent heat, and if grown outside Late May, June, July & August provides the heat the tomatoes need.
• Plenty of Sunlight – A greenhouse may need to be shaded due to the super hot temps inside but still gives the sunlight it needs. Outside in full sun will also met their needs.
• Protection from cold winds – This is where greenhouse growing is great, theres no wind. Be mindful where to plant them outside.

A Tomato Plant hates:

• A sudden drop in temperature, as growth will slow down,
• A long period of cold temperature, as flowers will fail to set fruit,
• Lack of water, as the leaves can curl or become discoloured.
• Too much heat on the leaves, as the leaves can curl and turn black.

Think Like a Grower – Moisture

Tomatoes are the consistent plants, they are not rebels and do not like extremes of heat or cold.

A Tomato plant needs access to consistent water so it can focus its energy on producing fruit (its No1 Goal).

Tomato Plant Stresses with Water

Plant Symptoms if its too Dry:

• Slowing growth,
• Split fruit,
• Blossom end rot on the bottom of the tomatoes.

Plant Symptoms if its too Wet:

• Weakened Plants,
• No oxygen in the soil for the roots,
• Tomatoes flavour can be reduced.

Think Like a Grower Tip

“Rather than watering at the same time each day, check the compost or soil first. Learn to observe moisture levels.

Think Like a Grower – Producing Fruit

Remember when you see the flowers, the plant shifts into fruit production mode. All its energy goes towards this No 1 goal of producing fruit.

This is your signal to give it everything it needs at this point in its life cycle to achieve its No.1 goal. Consistency is the key. Consistent watering, feeding, sunlight, warmth and insects/bees to pollinate the flowers. This is your chance to help your plants produce the best harvest ever!

Tomatoes need Fruit Production Support like:

• Airflow – this is more important than you think, so as to not get any diseases at this important stage. Don’t overcrowd your growing zone with too many branches crossing one another. Otherwise diseases like blight, mould and fungal diseases on the leaves creep in causing weak growth. Greenhouses need to concentrate on airflow more due to the humidity levels which is a perfect breeding ground for these diseases.
• Potassium-rich feed – Tomato-rite or an alternative feed works well to give the plant the nutrients it needs as the soil nutrients may be running out from growing the roots, leaves & stem.
• Pollination – Make sure the greenhouse is accessible day and night for pollinators.
• Consistent and stable watering – This is the period when your watering counts! More than any other time in the life cycle. An automatic watering system might help if you are pushed for time, as long as you remember to top it up as Tomatoes are hungry plants especially in the heat or heatwaves.
• Sunlight – The plants need sunlight to produce energy, if the plant lacks energy, the fruit production slows down.

Think Like a Grower – Leaves

The leaves of the Tomato plants tell a story, but are you listening to them speak?

One of the best ways to become a better gardener is to observe leaves. They tell a lot about how the plant is operating or how it is not doing so well.

If we as growers can pick up on these symptoms, we can change their environment and conditions for the better. Once we know what we are looking at, the conditions can be changed quicker and prevent disease or prevent plant death.

Tomato Leaves can reveal:

• Overwatering,
• Underwatering
• Nutrient Deficiencies,
• Cold Stress
• Heat Stress,
• Disease problems.

Think Like a Grower Tip

Observation is one of the most valuable gardening skills you can develop.

‘See something wrong & change it quickly to help the plant survive.’

Gardening becomes easier when you understand why.

It all starts to make sense when you think from the plants perspective. Once you can see the ‘why’ you can become more confident in solving the problems.

For Example:

Why are my tomatoes leggy? Because they are searching for the light.

Why are the tomatoes splitting? Because they have had a sudden burst in uptake of water and the skin exploded.

Why are the tomatoes plants not producing fruit? Because the plant doesn’t have warmth or energy from feed or water.

Learn to Think Like a Grower

The best growers are not the ones with the biggest gardens or expensive equipment. They are the people who:

• Observe carefully,
• Adapt to conditions,
• Learn from failures,
• Experiment,
• Understand plant behaviour.

The next time you walk into your greenhouse or vegetable garden ask yourself this question.

“If I were a Tomato Plant, what would I need right now?”

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Visit The Grow Veg Academy for online courses and learning videos including our Summer Sowings free video.

Want to branch out and learn more about soil, seeds, sowings and how to setup and plan your vegetable garden? Look no further than our Beginner Vegetable Gardening course.

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