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Container Tomatoes

Tips for growing tomato plants in a container

Three problems you should avoid: 1. Too small of a pot 2. overheated soil 3. fluctuating moisture

Choose the largest container available (eg. whiskey barrel) to allow plenty of room for root development. Make sure you use good, well-drained potting soil. The soil mix should retain some water but allow excess water to drain freely (don’t use garden soil). If your container does not have a drainage hole, add coarse gravel to the bottom of the pot. This also helps to weight down the pot so it doesn’t get knocked over on a windy day.
Container plants will dry out faster and will require more frequent watering on hot days. Water mature plants when the top inch of soil is dry and then water until it drains from the bottom.
Some afternoon shade from the hot sun will help keep the soil from getting too hot. Overheated soil will stress the plant causing poor growth of leaves and fruit production. Fluctuating moisture(too much, then to little) can cause problems such as blossom-end rot. To avoid blossom-end rot and cracking maintain even moisture and place a layer of mulch around the plant.

Pasta pot

For optimim success grow special varieties of tomatoes that are designed for container gardening such as a Patio Hybrid, Totem Hybrid (70 days). Both have compact vines that produce medium sized tomatoes. Tomatoes need at least 6-8 hrs of sun. They are heavy feeders and frequent watering will leach the nutrients down the drain hole. Therefore, fertilize regularily (10-14 days) with a 10-10-10. You can also add a time-release fertilizer to the soil as a suppplemental fertilizer.

You can have a varietable garden on your patio since most vegetables that can be grown in containers. Here are some of the easier ones; snap beans, beets, broccoli, carrots, cucumbers, eggplant, lettuce, onions, peppers, potatoes,pumpkins, radishes.

 
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21 comments to Container Tomatoes

  • Kris

    I am considering growing a few tomato plants in an area that gets only partial sunlight. Would it be advisable to supplement light from a grow lamp, when natural light is not available? What about the use of mirrors to reflect sunlight to shaded areas?

    HI
    Tomatoes need 8 hrs of full sun each day, plants will be weak and spindly and may not set fruit with less than 6 hrs . You can try the grow light and mirrors to provide additional light. I would be interested in hearing what kind of results you get. My suggestion is (if you can) plant and tomato in a large pot (16inch or more) find the sunniest spot available and see what happens

    .

  • mrb

    I have a porch tomato plant that has already started to fruit! Is it too early in the season to let this happen? Can you expound about early fruiting on container plants? Also give your best instructions on watering potted tomatoes? Thanks!

    When tomatoes reach a maturity level they start to produce flowers. Yours was probably started early in the season and is now ready to produce fruit. Sometimes they will fruit early as a result of stress and it triggers them to reproduce before they die. You may be the first one in the neighborhood to have home grown tomatoes! Keep your plant evenly moist during the growing season and fertilize once a week to replenish the nutrients that wash away.Time-release fertilizer also helps to feed the plant. In hot,dry spells water deeply.

  • Betty

    a general question i have for you…can Tomato plants be planted with other plants,such as Coleus?Or will the Coleus take all the nutrients from the fruits?

    Tomato plants can be planted with companion plantings. Be sure that they are comparable in light requirements. Coleus is a semi-shade/ shade plant whereas tomato requires at least 6 hrs. of full sun. As long as you supply enough water and nutrients both tomato and companion plants(provided they aren’t too aggressive) should grow without competing with one another.

  • justin

    I have a 33 x 10 m glasshouse and a 30 X 40m shahdehouse I do not know how to use – I do not have time to grow commercially but want to use them – any tips or ideas?

    I would recommend that you grow plants that you enjoy and once you get started you will find all kinds of new interesting things to grow in your greenhouse. Try a pot of leaf lettuce, herbs and your favorite houseplants. Keep in mind there will be a maintainance expense that comes along with the greenhouse such as heating, lights, repairs. Check out a book titled Greenhouse Gardeners’ Companion by Shane Smith, it might be helpful to you.

  • Robin

    tips for growing tomato plants in bucket

    Three problems you should avoid: 1. Too small of a pot 2. overheated soil 3. fluctuating moisture
    Choose the largest bucket available (eg. whiskey barrel) to allow plenty of room for root development. Make sure you use good, well-drained potting soil. Add coarse gravel to the bottom of the pot for good drainage. If the soil gets overheated it will stress the plant causing poor growth of leaves and fruit production. Fluctuating moisture will add blossom-end rot. You will have better luck if you grow special varieties that are designed for container gardening such as a Patio Hybrid, Totem Hybrid (70 days). Both have compact vines that produce medium sized tomatoes. They need at least 8 hrs of sun. Tomatoes are heavy feeders, be sure to fertilize regularily (10-14 days) with a 10-10-10. You can also add a timed-release fertilizer to the soil. Hope this helps.
    Kris

  • Virgil Lockhart

    I just planted in seperate 4 gal pots, a San Diego Hybrid and a Better Boy using potting soil and 5-10-10- fertilizer. My question is how often do I water and fertilize them. I was told that chicken fertilizer made into a tea mix was good for tomatoes. Also can I use miracle grow?

    Water thoroughly when the soil feels dry and let it drain out the bottom. Maintain even soil moisture but don’t keep it too wet. In the garden tomatoes need about 1 inch of water per week. Watering will depend on the weather. On hot, dry days you may need to water twice a day. Tomatoes are heavy feeders and growing in a container will need ample fertilizer to produce fruit since a good amount of nutrients drain out of the bottom of the pot. Feed them with a higher phosphorous ( middle number) 5-10-10 or 10-10-10 formula at every other watering. Chicken fertilizer tea is high in nutrients but can be “hot” and burn the roots unless brewed well before using. For optimal production, make sure that your tomatoes plants get 6-8 hrs. of sun. Hope you get lots of tomatoes, enough to share with your friends!

  • Bonnie Walling

    My healthy looking container tomato plant has beautiful flowers, but they are drying up before setting any fruit. I had great success last year with this same container in the same location. Help—

    The fruit will not set in excessive heat,if temperatures are above 90.

  • Keith

    I have planted tomatoes in large pots - one of the pots has tomatoes that has the leaves starting to curl – we water regularly and have fertilized twice – there are three plants per pot ( 10 gal pots ) – can you help me

    If your leaves are curling inward they are probably responding in self-defense to conserve water. Less exposed leaf surface will transpire less moisture. As the summer progresses and temperatures are hotter, plants will use more moisture especially when you have 3 plants in a pot that have matured and compete for water. Leaf Roll can indicate environmental factors such as uneven watering , prolonged wet soil, drought, high temperatures. Symptoms occur when the plant has a heavy fruit load. Be sure to water enough so that it drain out from the bottom of the container. In hot weather you may have to water twice a day. Tobacco mosaic virus (TMV) can also promote leaf roll. In addition, frequent watering leaches nutrients from the soil, therefore fertilize more often (at least every 2 weeks). Once you remedy the environmental problem, (barring viral disease) the leaves should uncurl. If the leaves are curling down- look for aphid on the underside of the leaves.

  • Dorothy Latimer

    I use 5 gallon containers with potting soil mixed with osmocote. Water with l/2 gal every morning. Now the bottom leaves are turning yellow. What should I do?

    Hi Dorothy
    Sounds like they may need more nitrogen (lower yellow leaves) . Many nutrients are washed out when the water drains from the bottom of the container. I suggest you add an all purpose soluble fertilizer(10-10-10 or 15-30-15) mixed in with the next watering and every 10-14 days. Follow label instructions for dosage.

  • broomcarol

    I have heirloom tomato plants in large containers using new potting soil. I water evenly and regularly. They get at least 8 hours of sun. I have some blossom end rot, not every tomato on every variety has it. I am using Tomato Maker 4-2-6 by Organic Laboratories Inc. which has 6% calcium. Also use Neptune Harvest Inc. fish and seaweed fertilizer 3-2-1. Both products used as directed and not applied at same time. How do I avoid getting blossom end rot? Thanks for your response. broomcarol

    HI Carol
    Blossom-end rot can be caused by several factors. Overwatering (heavy rainfall), underwatering(extensive dry spell),root damage, excess of soluble salts that reduce the uptake of calcuim. When calcuim is not easily translocated from old tissue to new tissue (when the tomato is forming) then blossom-end rot develops. Lack of calcium during fruit formation causes blossom-end rot. Some varieties are more susceptible to it then others. Uniform moisture is important especially when the fruit is forming. Adding lime to the soil (if needed as indicated by a soil test ) or spraying the foliage with a calcium nitrate solution once a week when fruit is grape size can help reduce the incidence of blossom-end rot.

    http://ipm.uiuc.edu/diseases/series900/rpd906/index.html

  • Mike

    Hi, is there a fixed number on the yield of tomatoes grown in containers throughout the growing season, or does it all depend on when it’s planted, the size of the container, etc?

    Hi Mike
    I don’t know of any fixed number of yield. It depends on how large the plant gets, growing and blooming conditions. It’s hard to predict what Mother Nature will do. One year you can have 5 tomatoes on a plant and the next twice as much. The variable that you can control is container size and fertilization.

  • Sara

    I have been trying to grow a tomato plant for around 1 1/2 months now. i keep up with watering, keep it in the sun and give it fertilizer but all of the leaves are droopy and the edges are dry and brown, everytime a tomato grows the bottom turns brown and dies. i have no idea what is happening to it. it is too high for animals to get at, and i even moved it out of the direct sun at times. what is wrong with my plant and why cant i keep it healthy?

    Hi Sara
    It sounds like a watering problem. Blossom end-rot which causes the bottom of the fruit to turn brown is caused by fluctuating moisture in the soil-either too much or not enough water. Water your tomato plant until it runs out of the bottom of the container. On hot days, in full sun, you may have to water once or even twice a day. Its best to water in the morning. If you have lots of rain(which you can’t control) don’t water until the top inch of soil dries out. Feed your plant once a week (follow label directions for dosage) and add some mulch to the container to retain even moisture. I hope this helps.

  • Daniel N

    I need some advice on my tomato plants.
    The leaves seem to be dieing off and the fruit has a brownish colour at the bottom and they seem to be spitting.
    The tomatoes have not yet ripened, but are near.
    Any advice on what and how to treat the problem would be most appreciated.
    Daniel

    Hi,
    It sounds as if you may have a watering problem. I know that sounds simplistic but in the aggregate both splitting (growth cracks) and brownish area at the bottom of the fruit (blossom end rot) are caused by uneven moisture. Mulch your plants, which will help maintain even moisture. In the garden, tomatoes need at least 1 inch of water per week. If growing in a container, water deeply until it drains from the bottom. Water again when the top1-2 inches of soil feels dry. If you allow the plant get too dry and then water, it causes an imbalance of nutrient uptake (calcium) resulting in brownish black spot at the point at the blossom end of the fruit. Over watering after being too dry (ueven moisture) will also cause the fruit to crack. If you correct the problem, the subsequent tomatoes should come out fine. You can still eat the cracked fruit provided you pick it before it starts to rot.
    Good luck and happy gardening.!. :-)
    Kris

  • Lena

    I am growing two Red Robin heirloom dwarf plants and recently transferred them into separate pots. Before I transferred them they were bothe doing fine. I noticed this week that some of the lower leaves have started to curl a little with some yellow and brown on the edges. Is this normal or could I have damaged the roots when I moved them. Neither had started flowering yet. I got a late start on planting them. I’m in southern GA and I know that the weather has been dry/humid and hot but I water them everyday. Any suggestions as to why the leaves started turning?

    HI Lena
    There are many reason why leaves turn yellow. Lower yellow leaves can indicate lack of nitrogen. Since you transplanted them in fresh soil, that would not be the case. The plant is most likely responding to stress from having their roots disturbed and hot weather. You might want to move them to “less sun” for a few days until they recuperate. Be sure to fertilize every two weeks when grown in the container as nutrients are easily washed out with watering.

  • aura

    Sometimes the new growth on top of the tomato plant seems to be drying and taking a brownish color and then either its growth slows down or it dies. Another problem is, one day the plant is vigorously growing and then it suddenly wilts. Watering is consistent in both cases.

    Hi Aura
    Is this plant in a container or growing in the ground?

  • aura

    Answer: Growing in Containers.

  • Planting short season varieties tomatoes in containers is a great idea to get you the very first available tomato of the season! Container gardening is an excellent choice for gardeners who live in an apartment or house without a yard. Get a few plants established and give them reasonable care, and soon you’ll have – great results! Most important is to choose large enough containers or pots (larger is better) and to water properly.

  • hlm

    i have two tomatoes growing in containers. one is an heirloom variety, the other was a from a church sale, so i don’t know. the “church one” is very tall. both have done very well, but over a week that i was away (a friend watered) the leaves have turned yellow and spotty on the church one, and i see some yellowing and spotting on the heirloom. it seems to be working it’s way up the plant. the church one is already half way up. i can’t tell if the spots on the leaves are an external powedery substance, or discoloring on the leaves.
    I did introduce worms into the pots two weeks ago, accroding to a friend’s advice to help airate the soil, which seems to have become very compacted. What do you recommend? Are they too far along to repot?

    HI
    I don’t think the worms are harming your tomato plants. Tomatoes do get a leaf spot – Early blight or Septoria leaf spot. Both are caused by a fungus that is present in the soil and develop in warm, rainy and humid weather. Leaf spot starts from the bottom and works its way up the plant. To keep it from spreading, remove any infected leaves avoid splashing soil on the plants and spray with an approved fungicide to control the disease.

  • jt

    Watering is essential. You have to be careful watering moist roots because the leafs are curling in hot weather. I have unpotted many plants with dead dry tops but soggy roots.

    I mist my plants during the hottest part of the day (over 100) and hose down the outside of the pots to cool the roots but follow the at least 1 inch dry on top soil rule before watering roots. As long as the nighttime temps are below 80 degrees the plants will be OK. Watering too much in pots creates surface roots which do not perform well. Lots of leafs and little fruit. Planting down in the pots and adding soil as the plant progresses over several weeks seems to provide a deeper root system which is essential in a potted tomato plant. Like anything in life diversify types and locations to insure at least some crop for your tomato sauce. IMO.

    Thanks for the comment!

  • Erin

    Hi, I have better boy plants. One each in 12 inch pots. They are tall, producing yellow flowers, no fruit. They appear healty, but bottom leaves are turning yellow. I see after reading that I need to fertilize them more. My question is, do I need to transfer them to larger pots or are they okay in this size as they appear to be healthy. Also, I may put small rocks on top of soil to keep them from drying out in the heat here in NC. Thanks for any info you can give!

    Hi Erin
    Do not repot the tomato. You will do more harm than good. Give it fertilizer that has a higher middle # so that it will produce more fruit. Wood chips would work better to place on top of the soil. Rocks can absorb heat and keep the roots even warmer.

  • Erin

    OK, thanks for info. (I don’t think my last post went thru)

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