Why Does My Tomato Plant Have No Flowers


Do you have a big tomato plant with no blossom? If yes, take heart to the fact that you are certainly not the only one. Tomato plants with no flowers are a common problem among tomato growers. It’s disappointing and at times frustrating when you put a lot of valuable time in your plant to get them this far and still setting no flowers.

Why does my tomato plant have no flowers? Lush Tomato plants without flowers indicate high nitrogen levels. Lack of Flowers can also be caused by inadequate sunlight, nutrients, water, or unfavorable weather. Checking your tomato plant will help to confine and eliminate the underlying cause.

Also, you will find in this article:

  • What causes a lack of blossom in tomato plants?
  • How much time does a tomato plant take to set flowers?
  • How can you help your tomato plant produce flowers?

Want to know the best part? The reasons behind the lack of flowers are often predictable and easy to fix. So please don’t despair, and let’s get to repair!


What causes a lack of Flowering with Tomatoes       

Lack of sunlight is among the most common reasons for dlowerless tomatoes. But, there are several other reasons your plant is lacking or not showing any flowers. Let’s discuss the factors separately to make it more clear up everything you need to know.

Plant Age

Too young or Immature plants are a prevalent cause why plants cannot flower. Tomato plants reach a certain level of maturity before they blossom. Usually, plants take 4-8 weeks to produce flowers after planting.

Nutrients Imbalance

A deficiency of nutrients will result in poor or no flower growth. On the contrary, excess nutrients can cause harm to the plants. For instance, plants need an adequate amount of Phosphorus for flower formation, yet extra Phosphorus turns down other micronutrients’ availability to plants, mainly Iron.

Similarly, boron can be toxic to plant growth if you add it in excess. At the same time, insufficient boron will cause poor pollination. Also, boron deficiency in plants leads to poor pollen quality and formation of the pistil (female part of the flower).

Nevertheless, lack of boron also affects pollen tube elongation. Be Careful: There is a thin line between sufficient and excessive; imbalance in nutrients has a more significant impact on plant growth, especially flower production.

A soil test is the best course of action if you suspect a nutrient-related issue. Let’s discuss some other nutrients that affect flower production in tomato plants.


“Blossom end rot”-it’s a plant condition that happens due to lack of calcium. Insufficient calcium shows up as lacking color and inward curling of young leaves and is often a problem in acid soil.


Potassium is essential for flower and fruit development. Lack of potassium leads to unproductive fruiting and old leaves that scorch, turn down brownish and roll up inwards and downwards.


Insufficient magnesium shows signs of discoloration of leaves between the veins: change into pale yellow from healthy green and eventually brown. Lack of magnesium in plants undergoes “inter-vein chlorosis”- a sort of mottled appearance.


Notably, some vegetables need plenty of nitrogen for leaf growth. A lack of nitrogen can turn leaf yellow, often the older ones first, and shows slow and spindly growth of leaves.

Other Nutrients

Plants also need small quantities of other nutrients such as Manganese, Copper, Sulfur, Zinc, and Iron.

Many of these nutrients give rise to intervein chlorosis similar to magnesium. 

Lack Of Sun

To set blooms, plants need an adequate amount of sunlight. Lack of light would be a reason why your plant fails to bloom. Tomato plants can grow but won’t produce flowers in the shade. Plants need a lot of energy to form flowers, and their main source of this energy is the sun.

Tomatoes need full sun. Consider placing your plant at a spot where it gets light for at least six to eight hours every day.

Too Much Nitrogen

A plant needs nitrogen for cell growth and chlorophyll. But excess nitrogen will reduce or stop flowers from forming. Conversely, plants remain big and healthy and produce primarily leaves and stems. Plants that grow unusually large and never produce any fruit are over-exposed to nitrogen.

Lack Of Water

Does the amount of water affect flower formation? Yes, too little water causes poor flower and fruit development. Lack of water produces few blossoms and then causes those blooms to drop. The tomato plant can’t sustain fruit production during a drought and preemptively removes extra stress-factors like flowers.


Consider the temperature of your area – Unfavorable conditions also result in no flower. Therefore, it is highly recommended to choose the tomato variety according to your climate.

Let’s find out different tomato plant injuries and requirements based on temperature.

Cold or Frost Injury

Cold weather may destroy flower buds or partially opened flowers. Plant varieties that are not fully hardy in your region are most vulnerable to cold injury.

Heat Heat Levels

Tomato plants love hot weather, but sometimes high heat plays havoc with pollination and has devastating effects resulting in pollen sterility. The best thing to do in these times is to give them plenty of water.

Watering the plants during a heatwave will keep plants healthy and in an excellent position to ramp up production once more.

Your tomato plant is not flowering yet? Add a shade cloth when it’s super hot outside. Build a wood structure frame and leave it open towards the east. Use this wood frame to drape the fabric. This way, your plant will get morning sun and filtered light during the harsh afternoon sun. Using a 50 percent shade cloth will reduce sunlight by 50 percent and heat by approximately 25 percent.

However, humidity comes as an additional complication. Both excess and lack of moisture are bad for plant health. A lot of moisture will clog the pollen. Making it unable to drop, whereas lack of humidity makes flowers so parched that pollen doesn’t stick and rolls straight off.

Improper pruning

Have you ever wondered why tomato plants do not flower? Proper pruning is essential to make sure that the entire plant gets some sunlight. Timing is very crucial when it comes to pruning. If you prune at the wrong time of the year, it will give your tomato a hard time focusing on flower production.


How Long Does It Take Tomato Plant To Flower

Your tomato plant will take to flower depending on growing conditions and the tomato variety that you are going to plant. Providing optimal conditions like sufficient water, bright sunlight, and regular fertilizer will produce flowers in an appropriate period.

After planting, it takes approximately 45 to 100 days for a ripe, juicy tomato and a month for the first flower to appear. The flowers start to form when vines are 12 to 18 inches tall.

The presence of yellow blossoms on tomato plants is an indication and the first step for fruit production. 


Help Your Tomato Plant To Produce Flowers

So you have these beautiful, big tomato plants but no flower-what gives? Read the tips below to help your tomato plant blossom!

  • Choose varieties that grow well in your growing spot. Plant breeds that can tolerate heat and drought conditions.
  • Indeterminate tomato plants are the best.

In contrast, determinate plants stop producing once their growth ceases. In contrast, indeterminate varieties continue to bloom even after nipped by frost temperatures, which happens months after determinate tomato varieties are finished producing fruits. 

Staking tomato plants allows good air circulation and plenty of sunlight, giving tomato plants more energy to produce more flowers.

  • Feed your tomato plant a low-nitrogen snack. Treating your tomato plant with too much nitrogen will favor foliage growth at the expense of flowers; use Phosphorus instead. Phosphorus increases flower production.
  • More importantly, buy fertilizers specifically for growing tomatoes and apply them as instructed.
  • Avoid over-fertilizing – the right amount of fertilizer matters as it enables tomato plants to reproduce early and often.
  • Help tomato plants get through hard times. If you observe day temperature above 90 F and nighttime temperature above 80 F, water them periodically to protect them from suffering sinking spells. 
  • Moreover, it is essential to remember that tomatoes grow in slightly acidic or neutral soil with a pH of 7. Adding leaves or compost will reduce the chances of problems with flowering. 


Using Epsom Salt

What if your green lush tomato plant has no visible health issues but has no flowers? Don’t worry! We have some fantastic inexpensive home remedies that will help you boost plant growth, flowering, and fruit production.

Epsom Salt

Firstly, Epsom salt is not salt; it’s a compound made up of magnesium sulfate. Magnesium sulfate is a nutrient that plants need for profitable growth. Plus, magnesium helps in chlorophyll and plant development, and sulfur provides plants with protein and other enzymes essential for growing healthy.

Naturally, through rain, sulfur is delivered to plants, but often plants need a little boost, mainly when the plant shows signs of blossom end rot.

1 tbsp Epsom salt will do best for plants that are less than 12 inches in height. Doing this will let the foliage green and encourage the fruit’s walls’ thickness, making for tasty tomatoes.

Dosage And How Often To Apply

Keep the following guidelines in mind.

Side dressing during the season

Apply Epsom salt 1 tbsp per foot to the plant height to the plant’s soil sound te base, wet or dry. Redo it every two weeks during the growing season.

Soil Additive at Planting Time

Before planting seed or transplant, apply 1 or 2 tbsp of Epsom salt to each hole’s bottom.

Foliar Spray During The Season

Apply Epsom salt ½ cup to the soil when the tomato plant starts to bloom. Also, hoe them lightly and continue watering them for 10 minutes. Mix Epsom salt with a gallon of water and spray once a month. This mixture will work as a substitute for regular watering.

Use 1 tbsp Epsom salt per gallon of water if you’re thinking of spraying more often than once a month. 


Epsom salt proper application not only gives tastier and sweeter tomatoes but does unbelievable things to your tomato plant;

  • Spraying a mixture of water and Epsom salt (1 tbsp) will discourage tomato-loving insects.
  • These micronutrients are essential for protein synthesis, photosynthesis, and cell structure.
  • Using Epsom salt on tomato plants makes them less prone to problems.
  • Spray Epsom salt will enable your tomato plant to bear fruit for a long time.
  • It makes your fruit redder when ripe and attractive too.
  • Epsom salt gives large tomato fruits.
  • Applying Epsom salt will improve seed germination and plant growth.
  • Epsom salt usage produces sweeter and tastier tomatoes.



Keep checking that your plant is getting balanced nutrients, plenty of sunlight, and the right amount of water. Plant the suitable variety according to your climate, and using the right amount of fertilizer is the key.

Try to get as much information as you can on when and how tomato plants set flowers before planting a tomato patch.