What is the best fertilizer to increase tomato fruit size?

Author: Blaze Metz  |  Last update: Saturday, July 5, 2025

Some growers prefer to use a high-phosphorus fertilizer, indicated by a larger middle number. You can also keep things simple with a fertilizer especially formulated for tomatoes – usually with a ratio like 3-4-6 or 4-7-10. Most importantly, don't over-fertilize.

What fertilizer is good for tomato fruit size?

A fertilizer low in nitrogen (N), high in phosphorous (P) and medium or high in potassium (K)---the three numbers in fertilizer nutrient analysis, always in that order---is ideal for tomatoes. The best analyses for tomato fertilizers are 8-32-16 and 6-24-24, according to the University of Missour.

How do you increase fruit size in tomatoes?

Maintaining a leaf area index of 3 will maximize fruit growth. Hand thinning of tomatoes on the end of a truss ensures more evenly sized, larger fruit. The use of growth regulators such as auxins at anthesis can stimulate fruit set, and increase fruit size especially under low light and low temperature conditions.

What can I feed my tomatoes to get more fruit?

Tomatoes need less nitrogen and more phosphorus and potassium at this stage. Look for something like a 5-10-10 fertilizer to encourage more flowers and fruit. Consider Organic Options: If you're into natural gardening, organic fertilizers like compost, worm castings, or fish emulsion are great choices.

What fertilizer to use to encourage fruiting?

Fruit trees prefer an organic, high nitrogen fertilizer. Good organic fertilizers high in nitrogen include blood meal, soybean meal, composted chicken manure, cottonseed meal, and feather meal. There are also specially formulated fruit tree fertilizers available.

4 EASY Ways to Increase Tomato Blooms and Fruit Set!

What fertilizer increases fruit size?

Potassium is the key driver of fruit size and alongside nitrogen is required in large quantities throughout fruit development and growth. However, too much nitrogen at a late growth stage can restrict fruit size; therefore a balanced nutrient application is crucial. Phosphorus can restrict fruit growth too.

How can I make my tomatoes grow bigger?

Give them consistent watering (deep and infrequent trumps a daily sprinkle), well-draining soil (incorporate generous helpings of compost into beds or containers at planting time), plenty of heat and light (direct, unobstructed sunshine for a minimum of 6 hours daily is best) and a slow-release, balanced fertilizer ...

What does Epsom salt do for tomatoes?

Tomatoes are prone to magnesium deficiency later in the growing season, which can show with yellowing leaves and diminished production. Ultra Epsom Salt treatments at the beginning of their planting and throughout their seasonal life can help to prevent and remedy magnesium deficiency in your tomato plants.

How can I encourage more fruit on my tomato plants?

If you're wondering how to increase flowering in tomatoes, try increasing how much light they receive. Tomatoes need eight hours of daylight to flower. Sunlight gives your tomato plants the energy to produce fruit, so if your plant doesn't have enough sunlight, you're less likely to see tomatoes fruiting.

Why is my tomato fruit staying small?

2) lack of water (wilting) can cut down on fruit development. 3) high temperature stress will limit fruit size. This is very common in the hot, humid southeast, especially in May and June.

What nutrient makes tomatoes bigger?

Two key nutrients must be present for tomatoes to thrive: Phosphorus, which promotes the growth of flowers and fruit. Calcium, which prevents blossom end rot (that dreaded black sunken hole on the flower end of your calcium-deficient tomatoes)

What is used to increase fruit size?

Potassium is a key driver of stone fruit size or weight and alongside nitrogen is required in large quantities throughout fruit development and ripening. However, too much nitrogen at a late growth stage can restrict fruit size and quality, therefore a balanced nutrient application is crucial.

How do you increase the size of tomato fruit?

Boron is an important nutrient, but one that is tricky to get right owing to it behaving differently on each crop. Here we look at how boron works in tomato and pepper crops and explore how boron can improve fruit size in these crops.

Is Miracle-Gro good for tomatoes?

Tomato plants have big appetites and need a steady supply of plant food to grow their best. Miracle-Gro® Performance Organic® Edibles Plant Nutrition Granules feeds both your plants and the beneficial microbes in the soil (which help plants take up all the nutrition they need) for up to 6 weeks.

Are coffee grounds good for tomatoes?

Tomatoes thrive in loamy soils with good drainage and high organic matter content. Adding composted coffee grounds to planting beds is a great way to build healthy soil for tomato planting but won't provide all the required nutrients.

What does baking soda do for tomato plants?

The baking soda absorbs into the soil and lowers its acidity levels giving you tomatoes that are more sweet than tart. Although I haven't done this with every plant on my patio, having a few extra sweet nuggets to mix into a fresh tomato salad has been a wonderful discovery!

Can I sprinkle Epsom salt around plants?

For potted plants, Scott recommends applying the Epsom salt solution once per month. When planting a magnesium-loving plant in your garden, such as roses, Scott recommends adding a light sprinkle of Epsom salt to the soil before planting it into the garden.

What is the best fertilizer for tomatoes and cucumbers?

When our fruiting plants are starting to produce flowers (think tomatoes, cucumbers, melons), it is a good time to add a fertilizer higher in phosphorus like Microlife Maximum Blooms 3-8-3. Fertilizer with greater amounts of phosphorus can also help blooming flowers.

What fertilizer increases tomato fruit size?

During this stage, it's recommended to supply 13:00:45 fertilizer and also foliar spray of Multiplex Kranti to treat calcium deficiency that triggers blossom-end rot in tomato crops. The potassium in the NPK fertilizer helps in fruit development, which is responsible for the size, colour, and taste of the fruit.

How do you yield bigger tomatoes?

Here are some ideas to help grow the best tomatoes you can.
  1. Choose the sunniest site available. ...
  2. Build good soil. ...
  3. Use a balanced fertilizer program. ...
  4. Maintain proper soil pH. ...
  5. Choose flavorful varieties. ...
  6. Start with good transplants. ...
  7. Use good watering techniques. ...
  8. Use an appropriate growing system.

Why are my tomatoes not getting very big?

The most common cause for small tomatoes is stressed plants. When plants are experiencing stressing circumstances, such as extreme drought or heat, insect infestation, or disease, they oftentimes stop sending their energy into flower or fruit production.

What fertilizer increases fruiting?

The Role of Fertilizers in Fruit Tree Health

Phosphorus (P): Crucial for root development, flower and fruit production, and overall tree health. Potassium (K): Strengthens plant cell walls, improves resistance to disease, and enhances fruit quality.

Which fertilizer is best for fruit size?

Vigore Fruit Size Enhancer is an advance product that helps to increase fruit size, develop uniform color & taste.It enhances vegetative growth, fruit size, fertility & post harvest storage. Vigore FSE improves the translocation system inside the plant during the fruit development stage.

What causes increase in fruit size?

Key Results Final fruit size is directly related to the number of cells produced in the period immediately following pollination. Late-maturing cultivars are larger than earlier-maturing cultivars and this is due to an extended period of cell division.

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