Tomatoes are easy to grow, both indoors and in the garden. They do well in pots and growing bags so are perfect for patios and balconies too.
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|Variety||Overall rating||Yield||Fruit quality||Plant growth||Ease of picking||Appearance||Aroma||Flavour||Texture|
USING THE TABLE The more stars the better. Yield: Average per growing bag (three plants). Fruit quality: Based on colour, skin quality, cracking or spilling. Plant growth: Includes emergence of seedlings and plant vigour in July and August. Overall rating: Based on taste test (50%), yield (20%), quality (15%), plant growth (10%) and ease of picking (5%).
|Variety||Overall rating||Taste||Texture||Appearance||Health||Length of cropping||Weight||% ripened at the end of the test||Number|
USING THE TABLE OVERALL RATING Ignores price and is based on: taste 23%; appearance 17%; health, 13%; number 13%; weight13%; texture 10%; percentage ripened by the end of the test 7%; length of cropping 4%.
|Variety||Overall rating||Yield||Fruit weight rating||Fruit uniformity||Fruit quality||Taste||Pests and disease|
USING THE TABLE The more stars the better. Fruit harvested from three plants. OVERALL RATING Ignores price and is based on: yield 20%; average fruit weight 20%; uniformity 20%; quality 20%; taste 10%; pests & diseases 10%.
|Variety||Overall rating||Yield||Quality||Ease of picking||Flavour|
USING THE TABLE The more stars the better. Yield Average per growing bag (three plants). Fruit quality Based on colour, skin quality, cracking or splitting. Flavour Includes smell, texture and taste. OVERALL RATING Based on yield (40%), flavour (35%), quality (15%) and ease of picking (10%).
|Variety||Overall rating||Yield||Texture||Flavour||Appearance of ripe fruit||Vigour||Suitability for a basket||Pest, disease and weather tolerance|
USING THE TABLE OVERALL RATING Ignores price and is based on flavour 20%, yield 20%, pest and disease 15%, suitability for basket 15%, texture 15%, vigour 10% and fruit appearance 5%
|Variety||Overall rating||Yield (ripe)||Yield (green)||Fruit quality||Blight resistance||Brix score||Flavour|
USING THE TABLE The more stars the better. Yields are healthy fruit from three plants. OVERALL RATING Score ignores price and is based on: blight resistance 40%, yield of ripe tomatoes 35%, flavour 10%, Brix score and fruit quality 5% each, yield of green tomatoes 5%.
We grow lots of varieties alongside each other then harvest the tomatoes regularly, and count and weigh the fruit from each variety. We also taste the tomatoes, rating them for taste and texture.
If you sow tomatoes too early the natural light levels will be too low and you'll get tall, leggy plants that won't grow well. Mid-March is perfect for tomatoes that will be grown indoors in a greenhouse or polytunnel.
Sow the seeds in a pot or small tray of a . They need a temperature of 15-20C to germinate so put them on a warm windowsill indoors or in a heated propagator. When the seedlings have emerged, they can be moved into individual 7cm pots of a . Gently hold the leaf - never the delicate stem - and loosen then from the compost by lifting underneath them with a pencil. Then make a hole in the new pot of compost and put the seedling in so that the leaves are just above the the surface of the compost. Keep them in a light place - either on a heating mat in the greenhouse or under grow lights in the house. Two weeks after moving them into their own pots, move them into a slightly bigger pot as they'll be growing quickly. Don't feed your plants at this stage.
Tomatoes are killed by the frost so you don't want them to be ready to plant before the danger of frost has passed in mid to late May. Wait until early April before you sow plants for outdoors. Do it in the same way as for plants for indoors (above).
You can either plant in the ground or in large pots or . If you're using pots, fill them with a mixture of a and a . There should be 50cm between plants in the ground. Don't plant outdoors until the danger of frost has passed in mid to late May.
To support your plants as they grow, either tie a piece of string to the greenhouse roof and put the end under the tomato plant, or insert a bamboo cane next to the plant. Put the plants in so that the soil or compost comes just below the first pair of leaves. This will encourage the plant to make extra roots so it's more sturdy.
There are varieties that have been bred to be compact and bushy, perfect for growing in a hanging basket. Put one plant in a 40cm-diameter basket and put it outdoors once the danger of frost has past in mid- to late May.
Most varieties should be grown as cordons ie only on one stem. Bush varieties are sometimes grown outdoors and these can be left to their own devices, with a few short canes to stop them falling over.
Cordon plants need to be tied to their support regularly and the sideshoots that grow between the main stem and the leaf need to be removed as they appear. This will channel the plant's energy into making flowers and fruit rather than extra leafy growth.
Tomatoes are thirsty plants so you need to water them regularly - twice a day for plants in containers during hot weather. Try not to get water on the leaves or it can cause disease problems.
Feeding is important to produce the sweetest tomatoes. The easiest way to feed is to add to the compost when planting in pots. If you plant in the ground or in growing bags, feed by adding a to the water after the first flowers appear.
Plants grown in pots also benefit from doing this in late summer when the controlled-release feed begins to run out.
To encourage all the fruits to ripen, pinch out the main growing tip of the plant in early to mid-August and remove any new leaves or flowers that appear. This is to channel the plant's energy to ripening the fruit before the colder weather returns in autumn.
Harvest from: August to October
You can choose how ripe you you like your tomatoes: half-coloured for tart, firm fruit or full-coloured for sweeter and softer fruits.
To pick the fruit, gently lift it upwards with your thumb on the calyx (the star-shaped green bits at the top of the fruit), to keep it on the fruit after it's picked. This will help the fruit keep for longer.
Each time you pick all the fruits on a truss (group of fruits), remove the leaves below to improve air flow around the plant and make it easier to avoid wetting the foliage when watering.
At the end of the season, you're sometimes left with green tomatoes that haven't ripened before the cold weather starts. Remove them from the plants before you pull them up and bring them indoors. You may have heard different techniques recommended for ripening green tomatoes, including putting them with a banana, but when tested different methods we found that putting them in a dark place indoors, such as a drawer, works best. Tomatoes left with bananas were one of the worst methods for causing the tomatoes to rot.
You can freeze whole tomatoes, but it may be easier to make them into dishes, such as tomato sauce or soup, first. You can also slice 6mm strips and put them in a dehydrator machine - these cost about £50.
Tomato leaves sometimes curl when the temperature is too hot. The plants will still grow so it's not a problem. Try to cool the greenhouse by opening the door and any vents and windows on hot days.
This fungal disease tends to occur in late summer and needs warm, humid weather - you can sign up to for alerts in your local area. On the stems, the first signs are large, dark-brown spots, which can spread and kill the plant. Similar spots form on the leaves, although they may be lighter or grey in colour. It takes very little time for the leaves to be covered, after which they wither and die. The fruits turn a red/brown marbled colour. Avoid wetting the foliage of greenhouse plants as it needs moisture to spread. Unfortunately there are no treatments for it so infected plants should be removed asap. They can be put in the as blight needs living plant tissue to survive.
The fruits can sometimes spilt open, often in varieties with thinner skins, such as cherry tomatoes. The fruit can still be eaten but it may become mouldy if left. Irregular watering is the cause of this problem so try water every day. Outdoor plants are particularly vulnerable as they may experience a sudden deluge in a rain storm.
Sometimes a ring at the top of the fruit remains green and fails to ripen. It tends to occur during hot weather so improving ventilation by opening the greenhouse door and opening vents and windows will help. The fruit can still be eaten.
This produces brown, leathery patches at the bottom of the fruit. You can still eat the unaffected parts. It's caused by lack of calcium, which is caused by erratic watering and hot temperatures. Water your plants regularly and help to reduce temperatures by opening the greenhouse doors and any vents and windows.
This green caterpillar munches the fruits and leaves. Look out for it in the evening when it's most commonly seen and remove any you find.