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How to grow Tomatoes

Tomatoes would easily be the most popular vegetable grown in the home garden. There is also something immensely satisfying about picking your own tomatoes for months on end. They produce more than other vegetables from a small space with yields of 5 kg per plant not being uncommon.

At a Glance:
  • Must have a warm, sunny position
  • Need a free-draining soil
  • Require regular watering and feeding

Selecting the Site

Tomatoes grow best in a warm, sunny position.

Ideally, grow them in a glasshouse for best results.

If you're growing them outside, they should not be grown in the same area of soil for 2 years in a row. It is best to move them to a new site each year and return to each site one year in four.

The Soil

Tomatoes grow in most soils, but the usual rules apply. They require good drainage, compost added to improve structure and the planting area raised in clay soils.

Ideally, fresh clean soil should be used in your glasshouse each year. The new soil should be made firm before planting and firmed again after planting.

Work into the soil before planting with Tui general garden fertiliser or Dynamic Lifter, together with a dressing of Lime.

The Plants

Tomatoes can be grown from seed or purchased as plants.

Always buy sturdy plants that have a short space between leaf joints, and if the plant measures nearly as much across from leaf tip to leaf tip, as it is high, you can be sure it has not been grown in an over-crowded situation. Nichol’s tomato plants are grown here in the south.

There are many varieties with fruit which varies in size, shape, taste, colour, acidity, as well as the growing habit of the plants. So if you are a tomato fanatic try the different varieties until you find your favourite, it can be fun.

The aristocrats of the tomato family are our ’X Generation’ grafted tomato plants which are strong and healthy - and the healthier the plant, the more resistant it is to diseases.

Some popular varieties are:

‘Money Maker’ is the most popular of the tall staked varieties. It has medium, large, round, fleshy fruit of good flavour.

‘Sweet 100’ is a tall variety with bunches of small fruit which hang like grapes.

‘Roma’ is the traditional egg shaped fleshy, non acidic tomato, popular for cooking and sauce making.

‘Tasty Tom’ is a disease resistant variety, with a full rich flavour, and is a very heavy cropper.

When to Plant

Being a warm weather crop, tomatoes don’t really start growing until temperatures are up to 20°C with night time minimums above 10°C.

Hence in most areas they can be planted from late September onwards. Successive plantings, about 6 weeks apart until early January, will ensure a good supply of tomatoes through until the end of May or sometimes later.

How to Plant

Plant each tomato plant at least 5cm deeper than it was in the punnet.

Plants are best planted out 50 to 60cm apart.

Good ventilation is essential to avoid fungal attacks so do not plant your tomatoes too close together as this will generally produce a poor crop.

Feeding

Tomatoes will yield much more if they are well fed. Hence in addition to the fertiliser applied prior to planting, commence weekly liquid feeding with Nichols Super Crop Tomato Food once the first truss of fruit has formed.

Watering

Tomatoes require lots of water regularly. Once established, they must not be allowed to dry out as this drastically reduces yield. Irregular watering leads to blossom end rot - a sunken black patch on the bottom of the fruit. Water daily in hot weather once fruit has developed.

However, do NOT over water in the early stages – small plants don’t need much water. Over watered soil is much too cold for tiny new roots to grow away strongly.

After Care

Tomatoes need to be supported by tying to a stake or fence. Some gardeners use a stake and tie the two main tomato stems to the stake at 30cm intervals.  Alternatively, twine the tomato plants up strong strings hanging from the glasshouse roof.

The two main stems come from the central leader of the young plant plus the first lateral or side shoot. Once these two stems are established all other side shoots (laterals) should be pinched out to keep the plant tidy and manageable.

Pinching out the new side shoots should be done twice a week as they can get out of hand very quickly.

Pests and Diseases - Troubleshooting

Many problems with tomatoes are associated with temperature, watering and feeding.

CLICK HERE for a description and suggested remedies to the most common problems.

 

 

 

Tomatoes would easily be the most popular vegetable grown in the home garden.  There is also something immensely  satisfying about picking your own tomatoes for months on end.   They produce more than other vegetables from a small space with yields of 5 kg per plant not being uncommon.

 

At a Glance

 

· Must have  a warm, sunny position

· Need a free-draining soil

· Require regular watering and feeding

 

 

Tomatoes are warm season plants. From a spring planting they produce fruit continuously from December until the end of May. This succession can come from the ongoing care of tall varieties growing on stakes or supports or from the easy-care method of successive plantings of dwarf varieties every three to four weeks.

 

Selecting the Site

Tomatoes grow best in a warm, sunny position. They should not be grown in the same area of soil for 2 years in a row. It is best to move them to a new site each year and return to each site one year in four.

 

The Soil

Tomatoes grow in most soils, but the usual rules apply. They require good drainage, compost added to improve structure and the planting area raised in clay soils.

 

The Plants

Tomatoes can be grown from seed or purchased as plants.

There are many varieties with fruit which varies in size, shape, taste, colour, acidity, as well as the growing habit of the plants. So if you are a tomato fanatic try the different varieties until you find your favourite, it can be fun.

 

‘Money Maker’ is the most popular of the tall staked varieties. It has medium, large, round, fleshy fruit of good flavour.

Sweetie’ is a tall variety with bunches of small fruit which hang like grapes.

Roma’ is the traditional egg shaped fleshy, non acidic tomato, popular for cooking and sauce making.

‘Tasty Tom’ is a disease resistant variety, with a full rich flavour, and is a very heavy cropper.

 

When to Plant

Being a warm weather crop, tomatoes don’t really start growing until temperatures are up to 20°C  with night time minimums above 10°C.

Hence in most areas they can be planted from late September onwards. Successive plantings, about 6 weeks apart until early January, will ensure a good supply of tomatoes through until the end of May or sometimes later.

 

How to Plant

Plants are best planted out 50 to 60cm apart when 15 to 20cm high. Work into the soil before planting  with Tui general garden fertiliser or Dynamic Lifter, together with a dressing of Lime.

Tall varieties will require stakes or support.

 

 Feeding

Tomatoes will yield much more if they are well fed. Hence in addition to the fertiliser applied prior to planting, commence weekly liquid feeding with Nichols Super Crop Tomato Food once the first truss of fruit has formed.

 

Watering.

Tomatoes require lots of water regularly. They must not be allowed to dry out as this drastically reduces yield. Irregular watering leads to blossom end rot - a sunken black patch on the bottom of the fruit. Water daily in hot weather once fruit has developed.

 

After Care

Tomatoes need to be supported by tying to a stake or fence. Most gardeners use a stake and tie the two main tomato stems to the stake at 30cm intervals. The two main stems come from the central leader of the young plant plus the first lateral or side shoot. Once these two stems are established all other side shoots (laterals) should be pinched out to keep the plant tidy and manageable. Pinching out the new side shoots should be done twice a week as they can get out of hand very quickly.

 

Pests and Diseases.

Many problems with tomatoes are associated with temperature, watering and feeding.  The main pests and diseases are -

Aphids  -  use Mavrik or Confidor

White fly  -  use Mavrik and sticky traps

Mites  -  use Mavrik

Blight  -  use Copper, Bravo or Greenguard

Psyllid  -  use Mavrik or Confidor

Tomato fruit-worm  -  use Yates Tomato Dust

  or  Success