Fertilizing Tomatoes – How to Fertilize Your Tomatoes

We want to make sure we do a proper job of fertilizing our tomatoes. Like most things in the garden, you can overdo it. Too much of the wrong types of fertilizer can either burn the plant or end up giving us all sorts of leafy growth but no fruit. Not enough and our tomato yields can suffer. Of course it's best to test the soil first and see what is actually needed. This article gives a quick overview of what's in fertilizers, and what combination can work the best in your tomato garden.

Title: Proper Nutrition For Prolific Tomato Plants

Author: Annettew

Article: Every tomato grower has a "secret recipe" for tomato growing success. An integral part of high tomato yield is proper plant nutrition. Plants need food, too! Giving a plant the right food at the right time will not only increase fruit yield, it will also help prevent damage from diseases and pests.

Plant Nutrients

Plants do not eat hamburgers and French fries, but they do still need "nutrients." Nitrogen, Phosphorus and Potassium are the three nutrients most commonly fed to plants. Most fertilizers are a combination of the three. When reading a fertilizer package, a three number series such as 3-0-3, or 15-10-5, presents the ratio of all three nutrients in the fertilizer. Other nutrients and minerals, in smaller amounts, help tomato plants grow robustly and healthily. Plants get nutrients from the soil in which they are planted, so soil preparation is integral to providing plant nutrients in proper amounts.

To determine which nutrients your garden soil needs to promote healthy plant growth, prepare a soil sample and send it to your local cooperative extension office for analysis. The soil sample will allow you to properly prepare the garden soil and add just enough of each lacking nutrient to grow healthy plants. Another important test is the soil pH. Soil pH affects the way plants are able to take in nutrients. If your soil is too high or too low, you will want to amend the pH by adding mulch (to increase acidity) or lime (to increase alkalinity.)


When to Add Nutrients

Tomato plants need nutrients at differing amounts at various stages of growth. After receiving soil test results and before planting tomatoes, work a general fertilizer into the soil. Ratios of 5-10-10 or 8-16-16 are good to start. The soil test results will tell you if you are seriously lacking one nutrient or another.

Once the plant begins growing, different ratios of nutrients promote best growth. Once the plant starts flowering, it needs a higher ratio of potassium.

Soil Composition for Plant Nutrition

Adding fertilizer is only one step to providing plants with proper nutrients and increasing crop yield. Soil composition and structure directly affects tomato plant health. Tomato plants thrive by growing roots deep into the soil. Hard clay soils must be broken and amended with compost to promote healthy root growth. Overly sandy soils need addition of organic matter in order to hold water and nutrients.

Compost for High Fruit Yield

Organic matter is an essential component of soil. Adding proper organic matter will greatly improve soil health, while adding improper organic matter is detrimental to soil. Organic matter can be added by top dressing or double digging. Top dressing with organic works exactly as it sounds-you add organic matter to the top of the soil, almost like a mulch. Double-digging requires digging and removing soil, mixing the organic matter into the soil, and replacing the newly combined soil.

Great organic matters are already composted, or broken down. As wood chips, leaves and other compost breaks down, it uses nitrogen. It is important to add composted organic matter rather than fresh, as fresh matter will remove essential nutrients from the soil. If fresh organic matter is all that is available, be sure to add nitrogen along with the organic matter.

Soil composition is one key to tomato growing success. Structure, pH, and nutrient availability all contribute to plant health. For more detailed information on soil health and how to manage nutrition (including diagnosing nutrient deficiencies), consult a comprehensive tomato growing reference such as How to Grow Tasty Juicy Tomatoes.

About the author: Annette Welsford is author and publisher of "How to Grow Juicy, Tasty Tomatoes." Visit her website www.bestjuicytomatoes.com for more information about how to grow the most robust, prolific tomato plants ever!

Explore posts in the same categories: Tomato Gardening Tips

8 Comments on “Fertilizing Tomatoes – How to Fertilize Your Tomatoes”

  1. Hans Says:

    Thanks for all the tips, great work!

    I have a question though: What are the percentages recommended for bone and blood meal when added to soil.

    We have very poor soil here in Florida. We are planning to grow our tomatoes in the following mixture:

    Per pot:

    20 gallons peat moss
    40lbs composted cow manure
    Dolomite Lime (for PH)
    Bone Meal % in volume OR weight
    Blood Meal % in volume OR weight

    Thank you for your help!

  2. Elizabeth Barrington Says:

    Your best bet is to contact your regional extension service office. You should find the number in your phone book, or through the University that is closest to you. They will even analyze your soil for you and tell you exactly what you need, and what the best varieties are for your area.

  3. Scout Says:

    I have a garden that measures 4'by 15'and consists 1 tomatoe plant and 1 green pepper plant,recently I add blueberries.. good idea or bad?

  4. John Says:

    Well, the blueberries are perennials, and typically don't yield till the 3rd year, so you will have to manage them differently than the tomatoes and peppers. They also need acidic soil, much more so than the other plants. But it can be done.

  5. Angela Says:

    We have put horse/goat manure in our garden this year and we turned it under & mix'd it really well. When we planted our tomatoes, beans & okra they did good for a little while and then the leaves started turning up. we found out the hey we fed them was treated with grazon and this would have an effect on the tomatoe plants. Do you have any suggestions of what to do?

  6. Emily Says:

    Hi there :)
    I'm conducting an experiement on the relationship between levels of nitrogen and growth rate of cherry tomatoes, and I'm growing the seedlings in pots next to a window. How often do you reccommend I water and fertilize them?

  7. Schedule Says:

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  8. Neil Walton Says:

    I've never used as little amounts of fertilizer to my tomatoes as some articles recommend. They just seem too small an amount. Generally I try to put at the rate of around 1000 to 1100 lbs of 10-10-10- per acre, over 2 or 3 applications, and I have very little rotten-end, when rotated, and they usually make very nice tomatoes. Would appreciate any alternative recommendations that might be better.

    Neil Walton

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