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Top Tips for Growing Tomatoes

Want to learn how to grow tomatoes? We have put together our top tips below: everyone wants to be proud of their home-grown tomatoes as the biggest and the juiciest. There is nothing more satisfying than picking and eating a home-grown tomato.

Sowing Tomato Seeds

If you want to learn how to grow tomatoes from seed, the best time to sow them is normally around the middle of March. This is because by this point the risk of frost should have passed and it should have started to get warmer.

Sow the seeds in 7cm (3inch) pots that are filled with a multi-purpose compost. Keep the seeds in a warm area to start with such as indoors or in a greenhouse. The seeds should germinate within a couple of weeks. Read our guide on how to grow veg from seed for more details on sowing seeds.

Growing Tomato Plants

Once the seedlings have grown large enough, they need to be planted into larger pots or into a tomato planter. If you have bought tomato plants, they need to be planted out into pots or growbags. We advise growing your tomato plants in a tomato grow bag. This is because you can be sure that the soil conditions in the grow bag are ideal for the tomato plants. It is a good idea to cut some holes in the bottom of the grow-bag before planting as this provides drainage to prevent water-logging. Cut holes in the bag to fit the tomato plants in. Create a nice sized hole for the plant in the soil and place the plant in this hole. Fill the soil back in around the plant and pat down. It is important to support the plant with a cane as it grows. The grow bags can be positioned anywhere, so you can get the best sun exposure and also wind protection. Feeding of the tomato plants can also be easily controlled with tomato planters. The Big Tom Tomato Planter is a good planter for tomato plant because it is seaweed enriched and feeds for up to 6 weeks.


  • Gently shake the plant so that pollen falls to pollinate the flowers which will then produce more tomatoes.
  • Pick out any side shoots that come between the leaves and the stem. If you don’t do this you will get a big bushy plant. Removing the side-shoots also allows for better airflow around the plants.
  • When the plant is about 2 metres tall, pinch out the top of the plant. This helps the plant to focus its energy into growing tomatoes rather than the plant growing.


Feeding Tomatoes

One of the most crucial parts to growing big and juicy tomatoes is feeding them. Westland Big Tom is a tomato food enriched with the essential nutrients, and also contains a wetting agent to increase the uptake of these nutrients, for a tastier and bigger yield of tomatoes. It contains a naturally occurring stimulant to encourage root growth. Healthier roots should result in a bigger and better crop of tomatoes.

As soon as you have tiny green tomatoes in your greenhouse, start to feed the plant. This is known as the first truss set. After the first feed, the plants should then be fed at least once a week. Feed by mixing 20ml (1/2 capful) of the tomato feed with 4.5 litres of water. Apply this to the base of the plant until the soil has become completely saturated. If growing tomatoes outdoors, start to feed once the second truss has set. Feed every 10 to 14 days using the Westland Big Tom feed in a concentrate mix.

Following our advice and using Westland Big Tom to feed your tomatoes should result in you having a fantastic yield of home-grown, big and juicy tomatoes.

Westland Big Tom with watering can


Peat Free Alternative

If you want to learn how to grow tomatoes in a way which is 100% sustainable and natural, our New Horizon Tomato Planter is the one for you. Naturally peat free, the formulation that gives your tomatoes triple the goodness. Plus, the planter has the perfect blend of Biofibre as well as West+ and Coir+ for the best yield of tomatoes. The planter is the ideal size for two tomato plants. Additionally, our new and improved bag ensures easier watering and deeper roots. The planter is also ideal for growing chillies, peppers and cucumbers too!


How to use

  1. Roll the bag and shake to open up the compost
  2. Cut the bag length-ways when in position
  3. Make holes and place plants. Push canes into place
  4. Water when dry. Feed every three days after the flowers appear


Find out more about New Horizon here:


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