Tomato Plants & Photosynthesis

Written by robert w. lewis
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Tomato Plants & Photosynthesis
Tomatoes rely n photosynthesis to grow and fruit. (Digital Vision./Digital Vision/Getty Images)

Tomatoes are favourite vegetables in the home garden. Liking full sun, they rely on photosynthesis to make food. Learning how photosynthesis affects tomato growth serves as a primer on the basics of the process.


Photosynthesis is the process by which plants use sunlight to convert carbon dioxide into sugars, which serve as food for the plant. Chlorophyll, the pigment that makes plants green, absorbs sunlight and starts the conversion process. The byproduct of this process is the oxygen in our atmosphere.

Tomato Needs

Some plants require more photosynthesis than others. To satisfy tomato's enormous energy needs, it requires full sunlight -- the more the better. Maximising sun exposure helps tomatoes and other sun-loving plants stay healthy.

Maximising Exposure

Even when planted in full sun, tomatoes can fail to get enough sun. Healthy looking plants that don't bear fruit may not have enough sun. Plant staked tomatoes farther apart so they don't shade each other, or plant them against a sunny wall.

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