Temperature is an important factor in the production of tomatoes, so plant when days are above 90 degrees F and nights above 76 degrees F.
 For the best soil for tomatoes, make your small space deep, loamy soil, that is well-drained and supplied with organic matter and nutrients.
 Tomatoes grow best in a slightly acid soil with a pH of 6.2 to 6.8, talk to your local nursery to find out how to make your soil pH right for tomatoes.
 Even though you have a small space, fertilize. Tomatoes respond well to fertilizer, especially phosphorus, but try and be careful about using excess nitrogen fertilizer. This will mean really great vine growth with little fruit.
 Choose the right containers for growing your tomatoes, make sure that are large enough to support fully grown plants, have adequate drainage, and never have held products that are toxic to plants.
 If you choose a wood product container, avoid one that is treated with creosote or pentachlorophenol (Penta). These treatments are toxic to plants.
 Put plenty of drainage holes in the bottom or along the sides of the container.
 Raise the container off the ground to allow excess water to drain freely.
 Move your tomato plants if needed to get them maximum sunlight and to protect them from harsh weather.
 Watering is very important. Containers dry out much more quickly than a traditional garden. This is especially true in full sun and wind. So when you water your tomatoes, water until water runs out the bottom, but not so much that it is left standing in water.
 Check soil for moisture once a day during hot weather, but be sure not to over water.
 To grow the best tomatoes you can, you need about six hours of direct sunlight a day. So, keep that in mind, and move the plants if necessary to make sure it happens.

So, these are some of the things you need to consider and keep in mind when growing tomatoes in a small space, now to do it do the following:

1. Get a good draining container, and put your well fertilized soil in it. You will want to do this a few weeks before planting.
2. Make sure the weather is right, that at night it does not get too cold, tomatoes are warm weather plants, and you do not want a frost to kill them.
3. Buy your tomato plants (talk to your nursery about which are best), you will want to consider dwarf tomatoes, or cherry, since your space is small, although, it is possible to grow beefsteak.
4. Install wire for the tomato vines to climb, around the outside of the container. The plants grow out generally, but will grow up if they have support. You can talk to the local nursery about how is best based on the variety of tomato plant you have chosen to use.
5. Water plenty. Check soil for moisture during hot days, loamy soil is best for tomatoes.
6. Allow for plenty of sunlight. They need at least 6 hours a day direct sunlight, so make sure they are not planted in the shade.
7. Do not plant too early.
8. Weed if necessary (although that is very rare in a container garden).