First buy FRAKTA Carrier Bags (1 bag for 2 plants is ok), we bought 30 last week. You may reckon that you will gain a suspicious look at the cash desk for buying so many bags.
At home take a scissors and cut about 3 centimetre from the bottom holes in each bag, every 15 or 20 centimetre apart. It is a very boring task but essential so the water can drain off.
You should start at the place where the plants will stay the whole summer because the bags are very heavy in the end.
Then fill the bags with gravel for about 10 – 15 centimetre. Now it will be the last opportunity to rearrange your new plant pots before you fill them with soil (you should use suitable soil for your plants). Don’t fill them completely otherwise the water will overflow.
And finally insert your tomatoes (or other plants) in the soil.