Growing Tomatoes – learn to grow your own!

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Growing tomatoes is one of life’s great joys as homegrown are so delicious! Plus tomatoes are easy to grow. If you have never grown any, I would really encourage you to give it a go. You don’t need a lot of space as they can easily be grown in hanging baskets, pots and planters too.

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Tomatoes happy on my patio!

A greenhouse can be handy if your climate is cold and wet for most of summer. However, as long as you have a sunny spot outdoors on a doorstep, patio or balcony you will be able to enjoy homegrown tomatoes!

In this post then, I will give you a step by step guide for growing tomatoes from seedlings, moving them outdoors, feeding, pruning the tomato plants and my top tips for success!

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Growing Tomatoes from Seeds

You may have never sown seeds before, but again I would encourage you to try it. Why you may ask me? Growing tomatoes from seeds allows you to pick your own choice of tomatoes.

There is a huge variety of tomatoes that you can grow easily at home that you would never be able to buy from your shops or supermarkets. They also differ in taste and sweetness, so it is a great way to find your own favourites too!

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Homegrown tomatoes with fresh basil, so delicious!

In the UK, we have a shorter growing season. Therefore to allow the tomato plants to grow and the fruits to ripen in the summer sunshine, we need to start sowing the seeds indoors. I sow my seeds in late March in my kitchen.

These are some of absolute favourites which I grow every year!

Roma Tomato Seeds

Costoluto Fiorentino Seeds 

Sungold Tomato Seeds

How to Sow Tomato Seeds Indoors

  • Fill small pots with seed sowing compost. I use this compost as it is an ideal texture to hold moisture for the seeds to germinate. You can also use multipurpose compost but make sure you keep it moist.
  • Use a chopstick or the blunt end of a pencil to make holes that are 0.5 cm deep.
  • Place a seed in each hole – I tend to place from 5 to 8 seeds in each pot (remember to sow a few more than you need, as not all seeds will germinate)
  • Cover each seed up by closing the hole with the compost on the sides.
  • Use slightly tepid water to moisten the compost. Try to avoid over watering as it may cause the seeds to rot.
  • Use a plastic bag to cover the pot or place in a tray that has a plastic cover – this will help to hold the temperature and humidity.
  • Leave the pots or tray in a warm place indoors. I like to leave mine near the boiler in my kitchen.
  • After 7-14 days, you will see little green shoots peeking through the compost. Once this happens, you can take the plastic cover off and place them near a bright warm window.
  • Water often as tomatoes need water so make sure the compost is always moist, but not too damp.

How to Transplant Your Tomato Seedlings

Once your seedlings have 4 leaves on them, they are ready for moving into their individual pots. 3 inch pots are ideal for this next stage of their growth. Water the pot of seedlings so that the compost is damp before you start.

  • Fill up each 3 inch pot with fresh new multipurpose compost.
  • Make a hole with a dibber, blunt pencil or chopstick.
  • Carefully, remove the seedlings from the pot in which they were growing (I use an old fork).
  • Hold the seedling by its first baby leaf and then move it into it’s new pot – plant it as deep as possible. Tomato plants love to be planted deeply as their stem will have the opportunity to grow more roots!
  • Cover with the compost around the stem of the seedling and then firm it down. Water gently and keep on a warm bright windowsill.
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Young tomato seedlings in their own individual pots

I keep mine on the kitchen windowsill and I love watching them grow as I wash the dishes! You will need to transplant them one more time once they are about 6 inches in height. The same process as above but a bigger pot for each plant.

They may need support as they grow and you may need to give them a small support sticks to lean on. You can also loosely tie the stem to the sticks with some jute or hessian string.

Growing Tomatoes – moving them outdoors

Spring is so exciting, especially as the indoor bound plants start feeling the fresh air! This means tomato plants now need to start spending some time outdoors in a sheltered patch in the daytime. There may be frost at night so they will need to come back indoors to sleep.

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Getting the tomatoes used to the outdoors in spring!

They will need about a week or two of this hardening process – where plants are getting conditioned to the outdoors while being protected from frost. Once the danger of frosty nights is over, tomato plants can be planted outside.

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Plant them deeply into their final pots
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Tomato plants in their final pots with french marigolds at the base

Top Tips for Growing Tomatoes for New Gardeners

  • Plant them in a sunny location that is ideally sheltered. I do this against my kitchen wall on my patio and use planters or individual pots.
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Growing tomatoes outdoors against my kitchen wall
  • The trick is to plant them as deep as possible to allow the stem to develop more roots.
  • Add some perlite to the pots as it will help to retain lots of moisture for the thirsty tomato plants.
  • Place your bamboo cane as support when you are planting your tomato plants.
  • I also grow basil and french marigolds at the base of the tomato plants as they make good companions. French marigolds naturally deter pests and this is very helpful when growing tomatoes. You can grow these marigolds at home too with my step by step guide.
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French marigolds grown at the base of tomato plants

Feeding your tomato plants

Once your tomato plants have flowers they will need to be given some feed. Tomatoes are hungry plants especially as they need the energy to produce those tasty fruits!

Buy Organic Seaweed Extract 

One bottle will last ages!

I use a diluted solution of organic seaweed extract for my tomato plants all through summer. Once a week or every other week is usually sufficient for happy tomato plants. One bottle will last you ages, and can be used for chillies, cucumbers and flowers!

Types of tomato plants

There are two type of tomato plants. A bush or determinate variety will not need pruning or much support and it fruits generally in one go. Bush varieties are ideal for small spaces, like balcony or patio pots and hanging baskets. My favourites last summer were Minibel and Vilma.

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Bush varieties are perfect for patio pots!

Vine or indeterminate tomato plants need ongoing pruning, strong support to hold them upright and will fruit all summer. Vine tomatoes may sound like more work but you will have tomatoes all summer long and so worth it! Have a look at Training My Tomato Plants post where I show you how to prune your vine tomato plants for larger and more successful harvests. I love growing Sungold, Gardener’s Delight, Roma and my new favourite Costoluto Fiorentino!

Gardening Know How has more information on Determinate and Indeterminate types of tomatoes, if you’d like to read further.

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One of my favourites, Sungold cherry tomatoes


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Loved growing these … Costoluto Fiorentino variety

Growing tomatoes is very rewarding and once you taste your delicious homegrown fruits, you will be so impressed too! Happy gardening and pop over to my Instagram to see more updates on these fabulous homegrown tomatoes!

Buy Roma Tomato Seeds

Buy Costoluto Fiorentino Seeds 

Buy Sungold Cherry Seeds

Buy Organic Seaweed Extract

Posts that you may also enjoy:

Growing Chillies – how to start from seeds

Growing Ginger – easy to grow indoors!

Grow Basil from Seeds indoors

Growing French Marigold flowers

10 Replies to “Growing Tomatoes – learn to grow your own!”

  1. Hi Hema

    What a great post – thanks so much. The tip about planting the young plants deeply to generate side roots is brilliant.

    This year I’m going to deliberately try to let some on my ‘leggy’ plants grow on their sides for a while so I get the top bit bending at right angles. I am then going to pot on the plant and bury it all up to the bent bit. I’m hoping this will make lots of new roots.

    Thanks again.


    1. Hi Steve,

      You’re welcome and happy that you have found it helpful. What a great experiment, I’m very interested to know how it results, so be sure keep us posted!

  2. Thank you for this post Hema, I’ve grown tomatoes before but checked it out especially for your recommended varieties , so I’m going to add, Roma Plum and Constoluto Fiorentino now!

    Gardeners’ Delight is always a firm favourite of mine and this year for hanging baskets (never tried this before) I’m going to grow Maskotka, I’ve also got Black Russian seeds from a friend.

    Thank you again for sharing all your knowledge


    1. Hi Ana,
      Great choices, love them both and Maskotka cherry tomatoes sound very promising, perfect for your baskets! I grew Black Russian tomatoes last summer; enjoy growing them and let me know what you think about them!

  3. Houseplantnerd says: Reply

    Hi Hema,

    Wonderful information. First time in my life, I got succeeded getting first home grown tomato fruit. Though the overall condition of the plant is not good. I am growing them in like 5 inch diameter , 4 inch deep recycled milk bottles on my windowsill outdoor. It’s the cherry tomato. I am in Saudi, temperature these days drop to 10 deg C at night (no frosting ofcourse). I started First week of Sep, 2020.

    I am mostly give them banana peel infused water (infused for 2 days), sometimes add carrot, apple peels too. This is daily watering, coz they’re root bound.

    The leaves look golden brown but not crisp or dead. I think this is lack of nitrogen. They are root bounded now. They are indeterminate varieties. My sill is east facing so I doubt they can sustain in saudi summers when temperature is max 45 deg C in noon-afternoon.. and the it’s coastal city and windy mostly. 50% flowers drop and make no fruit, I think they’re not pollinated. I remove suckers everytime I see any.

    Any advice on gold-browning leaves and increasing fruit production?

    1. Sounds like it would help to transplant them into a bigger pots or tubs with new multipurpose compost. A weekly feed of diluted seaweed feed as I have mentioned in my blog post above will help to rejuvenate the plants.
      Once they recover then they can direct their energy into flower and fruit production. Hope this helps.

  4. Hi Hema, I enjoyed reading your post about tomatoes. I have a problem with them that when they are just starting out they tend to get “leggy”, that is, they grow tall and sometimes flop over. How do I get them to grow strong and tall and straight without shooting up so quickly? Thank you!

    1. Hi Marla! Great to hear you’re enjoying the post. They become leggy in search of light. Place them on a warm bright windowsill once the seeds germinate and try not to overwater them. Once they have 4 leaves altogether, you can transplant them by burying the whole stem right up the first set of leaves. That will help to adjust their stems, from which more roots can form. Hope this helps!

  5. Sally Fairchild says: Reply

    Hi Hema, great info on the tomato growing, all the info I needed ……my seedlings are on their 3rd set of leaves so guess keep them inside until ? I’m just a little confused when they can go out as your info says Spring but mine are too small. At what height/leaf would you put outdoors? Many thanks.

    1. Hi Sally, you can transplant them outside once the danger of frosty nights is over otherwise that will damage or kill your seedlings. This can depend on your location so it is useful to check for your area. Once you know this you can start hardening them. Hope this helps.

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