How to Grow a Tomato Plant

Are you learning to grow your own sweet, juicy tomatoes? Luckily for you, tomato plants can grow almost anywhere that is warm and a little damp. But as with most vegetation that produce a fruit, a little 'tender, loving care' or TLC goes a long way. With adequate sunlight, water, and patience, you'll be greatly rewarded with a six foot tall tomato plant with big (or cherry size), red, or other heirloom colours, juicy tomatoes! Tomatoes take a long time to grow so you must have great patience. That's all you need to do to get your tomato plant growing. Have fun!

Print friendly version

Contains no photographs so no long downloads for mobile devices.

Print version

1. Buy small tomato plants from a nearby nursery and transplant them to your garden for the first-time grower. More experienced growers will find it easy enough to start their own tomatoes from seed.

2. Begin to raise your own plants, if you wish, from seed, in a greenhouse or sunny window indoors about a month before you intend to set them out in the garden.

3. Use fluorescent lights or other lighting hanging a couple inches (5cm) above the planting flat and keep raising it as the plants grow--in a not well lighted room. Raise these plants until they are about 6 to 10 inches tall (15 to 25cm) and then transplant them when spring weather is appropriate for your zone.

Don't pay extra to buy the larger plants; there is not much reason, unless you are getting a 'latish' start, to catch up.

4. Get good first-time growers’ varieties including Better Boy, Creole, Big Boy, Early Girl, Brandywine, Celebrity, Lemon Boy, or just about any cherry or grape tomato variety. ~ Plant several varieties rather than all of one type -- this ensures a steady harvest.

5. Grow two plants for each member of the family who will eat lots of tomatoes, as a rule of thumb. If you plan on canning tomatoes or making fresh and canned salsa, use up to four plants per person.

Plants usually cost AU $5 for one 8 inch (20cm) pot, or you can buy 6 small plants in 6 plant packs of 1 & 1/4 inch (3cm) compartmental trays.

1. Choose a sunny spot to place the plants to transplant them. Place tomato plants in a site receiving full sun (7 hours or more daily). Tomatoes need lots of warm sunshine for optimum taste.

Caveat: In hot climates when the nights get to a low temperature of about 75°F (24°C), then most tomatoes 'quit setting new fruit'. The ones already set will grow great. But none will set when nights are very warm through the wee hours really near sunrise.

Don't wait more than a few days late to put them out past the recommended dates for your climate zone, or it may be too late (if there are such early warm/hot weather nights).

2. Prepare the garden bed by adding lots of well rotted -- not green -- compost (5 to 8 pounds per square foot/25 to 40 kilograms per square meter) to the soil. Turn compost into the top 3 inches (6 to 8 cm). Tomatoes demand a growing medium rich in organic matter. If you don't make your own compost, use store-bought compost or composted manure available in the 20kg bags. Compost or Manure is usually less than AU $10 per 20-kg bag.

1. Transplant the tomato deeply. Bury about 50 to 75% of the plant (especially for leggy plants, that became skinny in raising them before transplanting). It’s okay to bury some of its lower leaves. New roots will emerge along the buried stem, giving the plant a developmental boost; a new transplant needs to focus on root production.

2. Give each plant about 1 gallon (about 4 litres) of warm water (about 80 degrees F/ 27 degrees C) within ten minutes of transplanting to avoid transplant shock.

3. Space tomato plants 18 to 36 inches (45 to 90 cm) apart; space them half the suggested distance in warmer climates, especially if using tomato cages. The normal distance recommended is for plants allowed to bush out hugely on the ground, while planting closer together in cages allows the plants to shade each others fruit, helping prevent burn and allowing a sweeter flavor.

Don't forget to leave yourself enough space to get in between the plants to water, weed, and harvest. Those cute, little seedlings may not remain that way for long.

1. Water in the first 7 to 10 days after transplanting at about 16 ounces (about 500 ml) of warm water per plant every day.

2. Wait a week or two after transplanting, and then place a mulch of straw, dried grass, or pine needles to control weeds and keep the soil moist during dry weather. The mulch should be about an inch (2.5 cm) thick and surround at least a circle 12 inches (about 30 cm) in diameter around the stem. Pine needles are especially good for helping raise the acidity of the soil.

Caution: Do 'not keep the soil continuously wet or "soggy". That will kill (smother) the roots and will cause a stem disease (fungus) especially once it is really warm/or hot weather.

3. Drip or soaker hose watering is better than overhead, which can encourage diseases that tomatoes are particularly prone to.

4. Space water out more after 10 days and ensure that plants are receiving 1 to 3 inches (2.5 cm to 7.6 cm) of rain weekly. If not, give each plant about 2 gallons (about 7.5 litres) per plant "per week", beginning by about the end of the second week after transplanting.

Water deeply 2 to 3 times weekly (so, water each plant with about .75 to 1 gallon each time (about 3 to 4 litres), increase water as the plants get larger and when weather is hotter.

It's okay in hot or dry weather to water even more frequently with larger volumes.

1. Consider using a tomato cage or a tall stake to support the tomato vine about 14 days after transplanting.

2. Make your own tomato cages, if you like. Get a roll of 4 feet height (1.25 M) "welded-wire" garden fencing 2" X 4" rectangular openings (5cm X 10cm) garden fencing with -- or 4" square openings (10cm) -- and soon you can make it double height, tied to more stakes, so wind will not knock them over as plants climb. Roll it into 18 inch wide (45cm) cylinders to make your own, larger cages. Cut and bend the wire ends around the uncut wires on the opposite end, making a circle. This type of cage needs strong stakes well tied for support.

1. Choose whether to use chemical fertilizers. Do not use lawn fertilizer. The ratio of minerals in lawn fertilizer is for growing stems and leaves. Look for a vegetable fertilizer which is for stimulating fruit. Tomatoes can grow very well organically, provided the soil is well enriched with organic matter. If you do use chemical fertilizers, try using half the recommended concentration per gallon (using package directions), but fertilize twice as often, in order to avoid the stress caused by the feast-famine of the longer fertilization gaps.

Over-fertilization can cause plants to grow too quickly, leaving them more susceptible to disease and insects.

Remember that your goal in growing tomatoes is fruit, not just leaves. Fertilizers, especially when used in excess, or the wrong kind may cause the plant to produce more leaves and foliage than fruit.

2. Shake your plant poles or cages gently once or twice each week for about 5 seconds once flowering begins to promote pollination of the blossoms (from one flower to another). According to the National Gardening Association, shaking the tomato plant increases fruit production by more evenly distributing pollen.

1. Watch for fruit to appear 45 to 90 (about 60) days after transplanting. Tomato plants usually have small, green fruit to start. Wait until the fruit is of good size with a bright, deep coloring: This means that the fruit is ripe and ready to pick. The texture of the fruit can also determine when it is ready to pick. Ripeness is usually determined by a slight softness. Be careful to only "palm the tomatoes"; do not squeeze with the finger tips and bruise the fruit.

Also, be careful of not allowing it to become overly ripe, which results in a very soft tomato.

Realize that birds, possums, raccoons and some dogs will take ripened tomatoes, corn and sweet green peppers, etc.

2. Pick fruit earlier to ripen indoors if you like: Fruit may be picked any time after it starts changing to its ripe color and set on a sunny windowsill. This will reduce the chances of it rotting on the vine or being eaten by a bird or squirrel.

Tomatoes do, however, taste sweeter when ripened on the vine, so you need to balance risk of threats versus taste.

1. Place a "zip-" of "snap-" seal sandwich type of bag over the nearly ripe fruit, very carefully, from the bottom up onto the stem to protect ripening tomatoes from predators.

2. Close the bag from both sides at the top, above the fruit, coming near the stem, leaving about 1/4" (.6cm) on each side for air flow.

3. Cut the lower corner for drainage and air flow. In hot weather, carefully punch more air holes, 1/2 inch slits (1.2cm), or smaller, will work.

Don't be disappointed by losing fruit to the animals; spend the time bagging it!

Another tip is to put red Christmas tree ornaments around the top of the tomato cage. The birds will peck at them, be confused and leave your tomatoes alone.

  1. Tomato plants (several different varieties)
  2. Composted manure. Available in 40-pound bags from nurseries, garden centers, or hardware stores.
  3. Trowel, small shovel or pickaxe.
  4. Twine or cloth for tying.
  5. Tomato stakes (bamboo, iron rebar, wood) or tomato cages.

Wikihow 2014, How to Grow a Tomato Plant, viewed 18 Sep. 2014,

All text and photographs in this guide is shared under a Creative Commons License.

Back to top

  • 29 Parkes St, Woodstock, NSW 2793, AU.
  • Ph: +61 2 6345 0016
  • Hours: 7am-4pm (GMT+10)