Unveiling the Secret: How to Cultivate Sweeter Tomatoes in Garden

Backyard Spruce


Tomatoes are perhaps the most widely grown vegetable in home gardens. The sheer array of choices and the versatile uses of tomatoes make them a favorite among gardeners. For many, cultivating sweet tomatoes becomes a passion, each year striving for even sweeter results.

Is there a secret to achieving sweet tomatoes?

Indeed, there is a hidden element to enhancing the sweetness of tomatoes. Keep reading to learn how to cultivate sweeter tomatoes.

Understanding Tomato Sweetness

Not all tomato varieties share the same level of natural sweetness. Simply growing your own tomatoes doesn’t guarantee a sweeter taste. Several factors come into play when it comes to the sweetness of tomatoes.

The level of sweetness in a tomato is a complex mix of plant chemistry, influenced by variables like temperature, soil composition, and the balance of rain and sunlight during the plant’s growth phase. The delightful flavor of a tomato is a delicate blend of acids and sugars, with some preferring tomatoes low in acidity and high in sugar. Scientists have delved into the research to unlock the mystery behind sweet tomatoes.

They identify that a quality tomato flavor is a combination of sugars, acids, and various aromatic compounds that contribute to the unique scent we associate with a perfect tomato. Referred to as “aroma volatiles,” over 3,000 of these compounds have been identified across a vast array of 152 heirloom tomato varieties.

Another group of scientists focuses on hunting down the genes responsible for increasing plant vigor. Through cross-breeding, these scientists uncovered the SFT gene, which triggers the production of a protein called florigen. The presence of this gene can boost yields by up to 60%, as it directs the plant to shift from producing leaves to flowers. One might assume that higher fruit production could lead to tarter tomatoes due to limited sugar production spread over the entire yield. 

Surprisingly, the presence of florigen in specific amounts not only increases yield but also enhances the sugar content, thus elevating the sweetness of the fruit.

Tips for Growing Sweeter Tomatoes

While the science behind tomato sweetness is intriguing, what practical steps can you take to grow your sweetest tomatoes? Begin by selecting the right tomato variety. Opt for types known for their sweetness. Generally, larger tomatoes like beefsteak tend to be less sweet, while smaller varieties such as grape and cherry tomatoes offer candy-like sweetness. Remember, when it comes to sweeter tomatoes, smaller is better. 

Choose tomato plants suited to your local climate, ensuring they receive the appropriate amount of sunlight, water, and growing time. Kickstart your tomato plants early to allow sufficient time for ripening. Ripe tomatoes equate to sweet tomatoes. Whenever possible, let the tomatoes ripen on the vine for added sweetness. Prior to planting, enrich the soil with organic matter to provide essential nutrients for the plants. Maintain regular watering throughout the growth stages.

Additionally, consider unconventional methods to enhance sweetness. Some suggest adding baking soda or Epsom salt to the soil, which, despite claims, do not directly boost sweetness. Instead, a mixture of baking soda, vegetable oil, and castile soap sprayed on plants can aid in combating fungal diseases. As for Epsom salts, utilizing a mixture of salts and water can help prevent blossom end rot.