How to Add Nitrogen to Tomato Plants

Waiting eagerly for your tomatoes’ ripening, but you are not able to witness the craved result as tomato saplings are not thriving the expected growth. This may be contributed to the reason that plants do feel the necessity for minerals like nitrogen, phosphorus, potassium, magnesium, calcium, etc. in the absence of which they do not grow as lively as aimed.

Among these minerals one such mineral is nitrogen. The plant does not have the competence to promote nitrogen content on its own, they need to incur it from outside. But do remember that perfect timing and quantity of nitrogen conferred to the plant also holds a significant part in attaining the best fruit. The very first thing which you should understand is that you should avoid fertilizing your tomato seedlings for the first few weeks. They may culminate into gigantic trees full of green leaves but not many red tomatoes. The same goes for the quantity as well. Overdose of nitrogen to the tomato plant will drive to ample of green growth with very less fruitful results.

Here we have bought the guide which can prove to be favorable for you in harvesting the matchless tomatoes. In this article, we are going to talk about the things with which you can improve the nitrogen content of your tomato plant. So, stay with us until the end of the article and know more about these amazing ways of growing healthier and happier tomatoes.

How to add nitrogen in the Tomato plant inorganically?

omato Plants

Are you growing tomato plants with a commercial perspective where you want a bulk amount of production within a certain time limit? Gardening masters suggest to use sulfur-coated urea, this will boost the nitrogen content of the soil. To fix a nitrogen deficiency in the soil you can use urea alone or as a part of a complete fertilizer blend, both are excellent ways to increase the nitrogen content in tomatoes plant.

Urea releases its nitrogen slowly to the soil, which means you reapply this fertilizer. Very often is not needed to see pleasing results from your tomato plants. It is always recommended to follow package directions, when and how to apply this type of product since it is easy to use high nitrogen man-made content.

Nitrogen as a fertilizer is common when buying chemical fertilizers. For specifically adding nitrogen to your garden, select a fertilizer with the high first number in the NPK ratio. The NPK ratio looks like 13-13-13 and the first number says about the nitrogen content in it.

Some of the Inorganic sources of nitrogen are urea, ammonium nitrate, ammonium sulfate, anhydrous ammonia, calcium nitrate, potassium nitrate, and sodium nitrate. You can select any of your choices. These are required in lower volumes and it releases nitrogen to the plant quickly to fertilize the tomato plant. Excess use of fertilizer may lead to salt build-ups and may burn roots or foliage. So use it in limited quantity during the phase of seedlings of the plant.

How to add nitrogen in Tomato organically?

How to Add Nitrogen to Tomato Plants

If you are willing to provide nitrogen to your tomato plants from a good source that not only boosts its productivity but also reduces its production time then you can think about adding nitrogen to your plant organically. This would not only fulfill the nitrogen requirement of the plant but it is also the safest way to do it.

The organic methods which are used to reduce nitrogen deficiency in your tomato plant, they require more time and effort than inorganic methods but it gives better results compared to inorganically added nitrogen.

If you want to add nitrogen you can do it in several different ways. You can add composite manure, fish meal, blood meal, worm castings, coffee grounds, and soybean meal. For fixing nitrogen in your tomato plant you can use the technique of mixed farming, you can plant peas, beans, etc that fixes nitrogen in the soil that supports other crops.

For quick results, you can use fish meals or blood meals because they release nitrogen in the soil relatively more quickly than other sources like composite manure, coffee ground, etc.

If you want a long-lasting result you can rely upon soybean meal or worm castling as they last longer in soil and release nitrogen for a longer period.

Soil improvement with crop rotation:

Add Nitrogen to Tomato Plants

There is one more way with which you can supplement the soil with nitrogen and growing your tomato in this nitrogen-enriched soil will accelerate the growth of your tomato plants. This practice is none other than crop rotation. By employing crop rotation, we are biologically fixing the deficiency of nitrogen in the soil with the assistance of leguminous plants such as peas, alfalfa. Legume cover crops have numerous indispensable impacts on nutrient cycling in tomato yielding. They rectify the soil and trees with nitrogen, recycle nutrient and influence soil nutrient availability.

Growing the same plant for a long duration over the same soil will deplete the soil fertility. So adopt for legume plant and grow it before growing tomato. This will advance the nitrogen content of the soil and you don’t need to add nitrogen externally, at the least, in the initial phase of tomato planting. It may be requisite in the later phase of the growth when the nitrogen content gets drained out. This way of growing tomatoes may prove to be a good one. This method of supplying nitrogen to the soil will result in lesser pest attacks, reduced transmission of soil-borne disease and encourage nutrients enhancement in the soil.

Symptoms of plants showing addition of excess nitrogen:

  • Excessive salt builds up in the soil.
  • Death of tissue and may happen complete necrosis – excessive applications.
  • Leaves and tomato may be poorly colored and/or puffy.
  • Prematurely drop or fail to form of tomatoes.
  • Higher chances of disease suchlike (Pith Necrosis, Early Blight, Fusarium, Blossom End Rot).
  • Vegetative growth increases at the expense of low tomato quality.

Symptoms of plants showing deficiency of nitrogen:

  • Leaf changes its colour from green to paler green, yellowish.
  • Leaf gets older too quick.
  • In extreme deficiency, it changes its colour to bright white-yellow.
  • New leaves of your tomato plant will grow smaller.
  • Reduce in fruitings, flowering, protein and starch contents.



It is the right of everyone to have healthy and nutrient-rich food in order to remain fit. We hope you do pick your preferred way of growing nutrient-rich tomatoes from the list above and take a step to healthy living today. Eat healthy, grow healthy.

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