There are two broad factors involved in growing sweet tomatoes. The first is the choice of tomato variety, and the second is the employment of good cultural practices.
There are dozens of different varieties of tomato. It is important to choose a variety that will flourish in your weather and soil conditions. In addition, since different varieties have varying flavors and sweetness, it is a good idea to taste a particular variety before you plant it to ensure that it appeals to your palate.
When planting tomato seedlings in your garden, here are some tips to facilitate the development of sweet fruit:
- Put a tablespoon of sugar and a handful of kelp meal in each hole before you plant the seedlings. The sugar does not work directly to make fruit sweeter, but it does facilitate microbial development, which in turn leads to sweeter fruit.
- Spread some manure on the soil around the seedlings when planting.
- Water the freshly-planted seedlings well.
As your tomato plants grow, you should continue to fertilize them on a weekly basis. If you wish to avoid chemical fertilizer, fish emulsion is a good alternative. Growing sweet tomatoes is something of a balancing act, however: if you over-fertilize your plants, you will encourage branch and leaf growth at the expense of fruit growth.
Another thing to consider in your quest for sweet fruit is the amount of sunlight that the fruit is exposed to. Direct sunlight is vital for the development of ripe fruit. Prune back any branches or leaves that are blocking sunlight from your fruit.