[Beginner’s Guide] How to Tell If Tomato Flower Is Pollinated - Agrolearner.com
How to Tell If Tomato Flower Is Pollinated

[Beginner’s Guide] How to Tell If Tomato Flower Is Pollinated

Tomatoes are a popular and versatile fruit that can be grown in gardens or even in pots on your balcony. One of the crucial steps in tomato cultivation is pollination, which ensures the development of fruit.

You can tell if a tomato flower is pollinated by observing the development of the flower. Once pollination occurs, the flower will start to wither and drop off, leaving behind a small, green swelling known as a fruit set. This indicates that the flower has been successfully pollinated and is on its way to developing into a tomato.

Understanding how to tell if a tomato flower is pollinated is essential for successful tomato gardening. In this beginner’s guide, we will explore various indicators that can help you determine if your tomato flowers have been successfully pollinated.

[Beginner’s Guide] How to Tell If Tomato Flower Is Pollinated

Tomato plants produce beautiful flowers before they can bear fruit. These flowers need to be pollinated to facilitate the transfer of pollen from the male reproductive parts (anthers) to the female reproductive parts (stigma).

Successful pollination is crucial as it initiates the process of fruit development. Without pollination, tomato plants won’t produce the delicious fruits we all love.

Pollination is the key to successful fruit production in tomato plants. When a tomato flower is successfully pollinated, the pollen grains land on the stigma, travel through the style, and fertilize the ovules.

This process triggers the growth of the fruit. If pollination doesn’t occur, the flower will wither and fall off, and no fruit will develop. Understanding the signs of successful pollination can help you ensure a bountiful tomato harvest.

Observation of Pollen

To determine if a tomato flower is pollinated, you can observe the presence of pollen. Pollen grains are tiny, powdery substances produced by the anthers of the flower. A well-pollinated flower will have visible yellow pollen grains on its stigma. The presence of pollen indicates that pollination has occurred or is in progress.

Read Also:  21 Fastest Growing Onions [Beginner’s Guide]

Petal Color Change

Another way to identify a pollinated tomato flower is by observing changes in the color of its petals. After successful pollination, the petals of the flower may start to wilt and change color, usually turning pale or yellowish. This color change is a positive sign that pollination has taken place and fruit development is underway.

Visible Swelling

Once a tomato flower is pollinated, you may notice a visible swelling at the base of the flower where the ovary is located. This swelling indicates that fertilization has occurred, and the ovary is developing into a fruit. It is an exciting stage to witness as your tomato plant progresses towards bearing fruit.

Wilting of Flower

After successful pollination, the flower’s job is done, and it will naturally start to wither and wilt. This wilting is a common sign that the flower has been pollinated and is no longer required to attract pollinators. The flower will eventually fall off, making way for the fruit to grow.

Factors Affecting Pollination

Several factors can affect the pollination process in tomato plants. Understanding these factors can help you optimize conditions for successful pollination.

Temperature and Humidity

Tomato plants thrive in warm temperatures and moderate humidity. Extreme heat or cold can hinder the activity of pollinators and affect the pollination process. Aim for a temperature range between 70-85°F (21-29°C) and maintain a moderate level of humidity to promote optimal pollination.

Insect Activity

Insects, particularly bees, play a vital role in pollinating tomato flowers. Bees are attracted to the bright colors and sweet fragrance of the flowers. To attract bees and other pollinators to your tomato plants, you can grow companion plants like marigolds or provide a water source nearby. Encouraging insect activity can significantly improve pollination rates.

Hand Pollination

If you notice a lack of pollinators or want to ensure thorough pollination, you can resort to hand pollination. This technique involves manually transferring pollen from the anthers to the stigma using a small brush or cotton swab. Gently brush the inside of each flower to transfer the pollen and increase the chances of successful pollination.

Troubleshooting Unsuccessful Pollination

In some cases, you may encounter issues with pollination in your tomato plants. Here are a few common problems and their possible solutions:

Lack of Insect Pollinators

If you notice a scarcity of bees or other insect pollinators in your garden, you can take steps to attract them. Planting flowers that are rich in nectar and pollen, creating a pollinator-friendly environment, and avoiding the use of pesticides harmful to pollinators can help improve pollination rates.

Read Also:  [Beginners Guide] How To Grow Parsley In Bag And Pots

Unfavorable Weather Conditions

Extreme weather conditions like excessive heat, cold, or heavy rain can hamper the activity of pollinators and reduce successful pollination. Consider providing shade or shelter during extreme weather events to protect your tomato plants and maintain optimal pollination conditions.

Self-Pollination Issues

Some tomato varieties are prone to self-pollination problems, where the pollen from the anthers fails to reach the stigma due to structural or genetic factors. In such cases, you can gently shake the flowers to aid pollen transfer or resort to hand pollination to ensure successful fertilization.

How to Identify Male and Female Tomato Flowers

Tomato plants have both male and female flowers, and it’s important to distinguish between the two for successful pollination. Here’s how you can identify male and female tomato flowers:

Male Flowers:

Male flowers appear first on the tomato plant. They typically grow in clusters and have a slender stem. The flower itself consists of a yellow, pollen-filled anther surrounded by a thin, green or yellow corolla. Male flowers do not have a swollen structure at the base.

Female Flowers:

Female flowers develop after the male flowers. They have a slightly larger structure at the base, known as the ovary, which will eventually become the fruit. The ovary is connected to the flower’s reproductive parts, including the stigma, style, and ovules. Female flowers are usually found alone or in smaller clusters compared to male flowers.

How to Pollinate Tomato Flowers

Pollination in tomato flowers can occur naturally through the action of pollinators like bees and other insects. However, if you want to ensure thorough pollination or if pollinators are scarce, you can also hand pollinate tomato flowers. Here’s how to do it:

  • Identify the male flowers that are fully open and have visible pollen on the anthers.
  • Gently remove a male flower from the plant and locate the anther (the part with pollen).
  • Touch the anther with a cotton swab or small brush to collect the pollen grains.
  • Find a female flower that is ready for pollination. Look for an open flower with a receptive stigma at the center.
  • Carefully transfer the collected pollen from the cotton swab or brush onto the stigma of the female flower.
  • Gently brush the stigma to ensure good contact between the pollen and the stigma.

By following these steps, you can manually facilitate the transfer of pollen from the male flowers to the female flowers, increasing the chances of successful pollination.

What Does a Tomato Flower Look Like After Pollination?

After successful pollination, a tomato flower undergoes changes that indicate fertilization and the beginning of fruit development. Here’s what a tomato flower looks like after pollination:

Read Also:  20 Best Fertilizers for Rice Crop Farming [Organic & Inorganic]

The petals of the flower may start to wilt and change color, often turning pale or yellowish. This color change is a positive sign that pollination has taken place.

The ovary, located at the base of the flower, begins to swell and enlarge. This swelling indicates that fertilization has occurred, and the ovary is developing into a fruit.

As the fruit develops, the flower will naturally wither and fall off, making room for the growing tomato.

How Long After Flowers Do Tomatoes Appear?

After successful pollination, it takes some time for the tomatoes to appear and reach maturity. The exact timeframe can vary depending on factors such as tomato variety, growing conditions, and weather. However, as a general guideline:

It typically takes around 45 to 60 days from the time of pollination for tomatoes to reach the mature green stage.

From the mature green stage, tomatoes usually take an additional 15 to 45 days to fully ripen, depending on the specific variety.

It’s important to note that these timeframes are approximate and can vary. Regularly monitor the progress of your tomatoes, and as they reach their mature green stage, observe them closely for ripening signs such as changing color and firmness. Harvest the tomatoes when they are fully ripe and ready to enjoy.

Remember to refer to the specific instructions for the tomato variety you are growing, as different varieties may have slightly different growth timelines.

How long does it take for a tomato flower to be pollinated?

The pollination process in tomato flowers usually takes a few days. Once the flower is successfully pollinated, you will start to see visible signs of fertilization and fruit development within a week or two.

Can you hand pollinate tomato flowers?

Yes, you can hand pollinate tomato flowers. Using a small brush or cotton swab, gently transfer pollen from the anthers to the stigma of each flower to ensure thorough pollination.

Do all tomato flowers get pollinated?

Not all tomato flowers get pollinated due to various factors such as lack of pollinators, unfavorable weather conditions, or self-pollination issues. However, with proper care and attention, you can increase the chances of successful pollination.

Is it necessary to remove un-pollinated flowers?

It is not necessary to remove unpollinated flowers. They will naturally wither and fall off, making way for new flowers to develop. However, removing them can redirect the plant’s energy towards fruit production.

What happens if a tomato flower is not pollinated?

If a tomato flower is not pollinated, it will eventually wither and fall off without developing into a fruit. Lack of pollination results in unsuccessful fertilization and fruit production.


Understanding how to tell if a tomato flower is pollinated is essential for every tomato gardener. By observing indicators like pollen presence, petal color change, visible swelling, and wilting of the flower, you can determine whether pollination has occurred or not.

Factors like temperature, insect activity, and hand pollination can influence the success of pollination. Troubleshooting issues like lack of pollinators, unfavorable weather conditions, and self-pollination problems can help you overcome challenges and improve fruit production in your tomato plants.

Author: Adewebs

David is a seasoned farmer with over 8years experience on the field and teaching. He has about 20 acres of Palm farm, 10acres of livestock farm where he spent most of his time tending and caring for his farm. He offer profffesional services and consultancy services to clients who are interested in venturing into farming.

Leave a Reply

Your email address will not be published. Required fields are marked *

error: Alert: Content selection is disabled!!