Tomatoes: The most popular vegetables in the world

Tomatoes: The most popular vegetables in the world

Tomatoes: Nutrition, Benefits, and Uses


Tomatoes are one of the most popular vegetables in the world. They are versatile and used in many cuisines. Tomatoes provide many health benefits as they are high in lycopene, vitamin C and antioxidants. Lycopene is good for heart health and may help reduce the risk of some cancers. Tomatoes also contain vitamin C, vitamin K, folate, potassium, magnesium and choline.

Lycopene Benefits:

Tomatoes contain high amounts of lycopene, which acts as an antioxidant that helps neutralize harmful free radicals. Lycopene may help reduce the risk of certain cancers such as prostate cancer and breast cancer. Lycopene also helps maintain heart health by preventing LDL or "bad" cholesterol from oxidation.

Vitamin C Benefits:

Tomatoes contain high amounts of vitamin C, which acts as an antioxidant and is important for immune function, wound healing and healthy skin. Vitamin C helps absorb iron from the diet, so eating tomatoes with foods high in iron can maximize the iron absorption.

Heart Health:

The lycopene, vitamin C and other nutrients in tomatoes are good for heart health. They may help lower high blood pressure, high cholesterol levels and may reduce the risk of blood clots. Tomatoes also contain folate, which is important for heart health.

Bone health:

Tomatoes contain high amounts of vitamin K, lycopene and folate, which are good for bone health and may help prevent conditions like osteoporosis. Vitamin K is important for blood clotting and maintaining bone mineral density.

Digestive health:

Tomatoes contain fiber which aids digestion and helps maintain bowel regularity. Tomatoes also contain folate, which helps support cell growth and metabolism.

So in summary, tomatoes are very nutritious and offer many health benefits for the heart, blood vessels, bones, immune system and digestive system. Eating more tomatoes and tomato products is a great way to boost your


Growing Tomatoes: Soil vs. Hydroponics

There are several ways to grow tomatoes. The two most common methods are soil planting and hydroponic planting.

Soil planting:

This is the traditional method where tomatoes are grown in soil. Tomatoes require fertile, well-drained soil and plenty of sunlight to produce healthy fruit. The key is to rotate the tomato crop each year and plant them in a spot that has not had tomatoes, peppers, eggplants or potatoes for at least 2 years. This helps prevent disease buildup in the soil.

Hydroponic planting:

Hydroponic tomatoes are grown without soil, in an inert medium such as perlite, rockwool, coconut coir, or vermiculite. Nutrients are delivered to the roots in a nutrient-rich water solution. This method is popular for home gardeners and commercial growers. Some benefits of hydroponic tomatoes are higher yield, faster growth, and less disease or pest problems.

What is hydroponic tomatoes?

Hydroponic tomatoes are grown without soil using mineral nutrient solutions in water. The roots are able to absorb nutrients directly from the solution.  Hydroponic systems can be set up indoors or outdoors. Indoor systems allow you to grow tomatoes year-round. Some common hydroponic systems for tomatoes include deep water culture where roots are suspended in an oxygenated nutrient solution and drip systems where a timer controls the dripping of nutrient solution onto the roots.

Proper care is required for both soil and hydroponics tomatoes regarding sunlight, watering, fertilizing and pest control. When harvested, tomatoes can be eaten raw in salads, cooked in stews and sauces, sun-dried, or processed into tomato juice, paste and ketchup. Homegrown tomatoes always taste better than store-bought ones!

Setting Up an Indoor Hydroponic System for Tomatoes


Here are some steps

  1. Choose a hydroponic system. For home use, a deep water culture (DWC) system using buckets is simple to set up. You will need a container such as a 5-gallon bucket for each plant.

  2. Select tomato seedlings or clones. Choose a variety suitable for hydroponics such as 'Sweet Million' or 'Better Boy'. Seedlings should have 3 to 5 leaves.
  3. Prepare the growing medium. Use perlite, rockwool or clay pellets. Perlite and pellets provide drainage while rockwool also retains some moisture.
  4. Add an air pump, air stones and tubing. Place air stones in the bottom of each container to provide oxygen to the roots. An air pump can oxygenate multiple containers.
  5. Prepare the nutrient solution. Use a formula with equal parts nitrogen, phosphorus and potassium such as 10-10-10. Calcium and trace elements are also needed. Change solution every 2 weeks.
  6. Assemble the containers and fill with solution. The solution level should cover the lower part of the seedling stem. Do not submerge the whole stem or foliage.
  7. Suspaptent the seedling over the opening and place the roots in the solution. Make sure roots are fully submerged but not the stem.
  1. Place lighting above the plants. Full spectrum LED grow lights or fluorescent tubes placed close to the plants.


Here are some tips for choosing a hydroponic system:

Homemade systems vs commercial systems:

Homemade hydroponic systems are cheaper but may require more maintenance. They include:

  • Deep Water Culture (DWC) buckets: Easy to set up using lidded buckets, air pumps and air stones. Requires frequent monitoring of solution temperature and pH.
  • Drip systems: Uses a timer to drip nutrient solution onto the roots. Requires installation of tubes, valves and pumps. Risk of clogging.

Commercial systems provide automation and convenience but at a higher cost:

Aeroponic systems:

Nutrient solution is sprayed onto roots. Requires investment in misters, pumps and timers. Minimizes root disease but higher technical skills needed.

Ebb and flow systems:

Uses a timer to flood the roots with solution and then drain. Requires investment in trays, pumps, pipes and medium such as rockwool. Can be left unattended for a few days.

The best systems for home use are:

  • Deep Water Culture (DWC) using lidded buckets: Simple, affordable and productive. Requires frequent monitoring but ideal for small spaces and beginners.
  • Ebb and flow using rockwool: Also affordable, productive and can be left alone for a short time. Rockwool medium is inexpensive and effective for tomato roots.
  • hydroponic growing system or drip system: For enthusiasts wanting higher productivity and automation. Units can start from $20-$50 for 2-4 plants. Require slightly more technical skills.
  • Algae sponges as the growing medium. Sponges retain moisture while allowing oxygen for roots. Algae also produce nutrients and oxygen benefitting plant growth.
  • A reservoir with circulation pumps that automatically flood roots and drain solution. Prevents stagnation and delivers nutrients.
  • Submersible aeration pumps in the sponges provide constant oxygenation. Healthy root growth.
  • LED lighting panels provide energy efficient full spectrum light for photosynthesis. Automated timers control the light cycle.
  • Built-in meters monitor pH, temperature, humidity and light levels. Maintains ideal conditions for growth.
  • Minimal maintenance. Only requires solution changes every 2-4 weeks and wiping down pumps/tubes.

Advantages of this system:

  • Algae sponges are sustainable and leave no waste, unlike medium like rockwool which requires replacement. Sponges can be reused for multiple crops.
  • Automated control of solution flooding, lighting, temperature and humidity provide the optimum climate for vigorous plant growth. No manual adjustments needed.
  • Constant root oxygenation and moving solution prevent disease outbreaks. Healthy roots absorb nutrients better.
  • LED lighting more energy efficient than other hydroponic lighting. Long-lasting for many years.
  • Minimal need for pumps and tubing within reservoirs lowers the risk of failure and need for troubleshooting.
  • Meters provide data to show plant health and catch any issues early. Can make adjustments even while away from the system.

Benefits of Advanced Hydroponic Systems

While an advanced system like this requires a higher initial investment, the return is better plant growth and less hands-on maintenance. The ability to leave an automated system mostly unattended for long periods also allows for vacations without a plant sitter. Such systems give hydroponic gardeners more freedom and independence.

Starting Recommendations

For a start, I would recommend either the hydroponic growing system or drip system for hydroponic tomatoes. They are easy to set up and suitable for a small number of plants. As your experience grows, you can consider more advanced systems for higher yields.


Daily care tips for hydroponic tomatoes:

pH Level Maintenance


Check solution pH daily and adjust to 5.5 to 6.5 if needed. pH affects the availability of nutrients to the roots.

pH is critical in hydroponics because it affects the availability of nutrients for plant roots to absorb. At the wrong pH, certain nutrients become unavailable while others increase to toxic levels. The ideal pH range for hydroponic tomatoes is between 5.5 to 6.5. I recommend checking pH at least once a day and adjusting with pH up or down solutions.

Temperature Control

Check solution temperature and maintain between 65 to 75 F. Fluctuating temperatures stress the plants.


Run air pumps constantly to provide oxygen to the roots. Lack of oxygen stunts growth.

Equipment Maintenance

If using drip emitters or sprayers, inspect them for any clogs and clean them. Ensure even delivery of solution.

Wipe down any pumps, tubing or trays to prevent buildup of algae and salts.

Plant Care

Prune side shoots for better growth. Also prune older leaves and any diseased plant parts.

Gently vibrate flowers to pollinate and develop fruit set using an electric toothbrush or vibration device.

Raise lights as plants grow taller or prune foliage to avoid shading lower leaves.

Perform a complete solution change every 2-4 weeks based on size of reservoir and number of plants.

Factors affecting hydroponic tomatoes:

Lighting: Insufficient light reduces growth and fruiting. Excess heat from lights causes stress.

Nutrient deficiencies or excesses: Lack of nutrients slows development. Too much of some nutrients causes toxicities.

Temperature: Extreme heat or cold shocks plants and reduces nutrient uptake by the roots.

pH level: Outside the optimal range affects availability and uptake of nutrients by the roots.

Aeration: Lack of oxygen to the roots stunts plant growth as roots require oxygen to function.

Pests and disease: Common problems include aphids, mites, blossom end rot and powdery mildew. Scout regularly.

Nutrient Requirements for Hydroponic Tomatoes

The solution should contain equal parts nitrogen, phosphorus and potassium such as 15-15-15 as well as calcium, magnesium and microelements (iron, manganese, zinc, boron, molybdenum, copper). Calcium is especially important for developing fruit.


Here are tips for pruning hydroponic growing tomatoes:

Early pruning of tomato seedlings:

  • Once seedlings develop 3-4 true leaves, prune them to one or two main stems by pinching out side shoots. This focuses the plant's energy on strong stem growth.
  • As seedlings grow, continue removing side shoots through pruning or pinching. Side shoots produce foliage but little fruit.
  • For determinate tomato varieties, also prune leaves up to the first flower cluster. This allows for better air circulation. Prune judiciously on indeterminate varieties which continue flowering and fruiting.

Signs of healthy tomato seedlings:

  • Dark green, flat leaves. Watch for curling, spots or yellowing leaves indicating nutrient issues or disease.
  • Steady moderate growth. Seedlings should gain a few inches in height weekly with regular new leaf production. Minimal growth indicates environmental or cultural stress.
  • Strong, evenly colored stems. Weak, spindly stems or stems that change color near the base indicate disease or root problems usually due to overwatering.
  • Damp but not soggy growing medium. Saturated medium leads to root rot while dry medium slows growth.

Cleaning a hydroponic tomato system:

  • Replace at least 1/3 of the nutrient reservoir solution every 2-4 weeks depending on size. Check pH and EC; adjust levels to the proper range. Replace solution entirely every 3 months.  
  • Use mesh or covers over drain holes, tubes and pipes to prevent roots from entering. Exposed roots will dry out and die.
  • Remove any salt buildup on trays, containers or other equipment. Salt buildup prevents proper drainage and air flow to roots.
  • Collect runoff to prevent excess buildup of salts in the growing medium. Runoff with high EC reduces root health and vigor.


Here are tips for harvesting hydroponic tomatoes:

Growth period: The time from seedling to harvest for hydroponic tomatoes is 60-90 days depending on the variety. Some smaller cherry and grape tomato varieties may mature in 60 days while larger beefsteak types need up to 90 days. Factors such as lighting, temperature and nutrition also affect growth rate.

FAQs: Harvesting Tomatoes

Q1: How can I tell if my tomatoes are ripe and ready for harvest?

  • A: Look for a fully red, ripe color. Ideally, tomatoes should be completely red for the best flavor, although some varieties may have reddish-yellow or striped skin when ripe.

Q2: What should the texture of a ripe tomato feel like?

  • A: The flesh should be soft but not mushy. When you gently squeeze the tomato, it should yield slightly to pressure. If it feels very firm, it's likely unripe.

Q3: How should I remove the tomato from the vine?

  • A: Gently twist the ripe tomato. It should pull away cleanly from the stem with a gentle tug. If it's green, it will be difficult to remove.

Q4: Can the aroma of the tomato help in determining its ripeness?

  • A: Yes, ripe tomatoes release a distinct tomato aroma. If there's no aroma, the tomato might not be optimally ripe.

Q5: How should I handle indeterminate tomato vines during harvest?

  • A: For vining tomato plants, snap the tomato stem so only 3-4 leaves remain attached. This promotes continued ripening without the tomato drawing nutrition from the plant. These leaves also manage carbon dioxide and moisture exchange for the ripening fruit. Determinate vines can be pruned shorter.

Q6: What is blossom end scarring or cracking?

  • A: As tomatoes ripen, the blossom end might show some slight scarring or cracking. This is typically harmless and doesn't affect the flavor or quality unless the cracks are excessively deep.

Q7: How can I check the seeds to determine ripeness?

  • A: Fully ripe tomatoes have viable seeds that appear separated inside the locules (seed cavities) of the tomato. In contrast, unripe seeds look embedded in the jelly-like locule tissue.

Q8: How long do ripe tomatoes last after harvesting?

  • A: Once harvested, ripe tomatoes can be stored at room temperature and will last up to 1 week. Enjoy the rich flavor of your homegrown tomatoes!


Hydroponic tomato cultivation offers a unique advantage over traditional soil farming. Despite the initial investment, the precise control over nutrients, water, and climate ensures a bountiful yield of rich, flavorful tomatoes. By diligently maintaining your system and adhering to best practices in component selection, pruning, and pest control, you're setting yourself up for success. Whether you opt for a DIY approach or a sophisticated commercial setup, the taste and quality of homegrown hydroponic tomatoes are unparalleled. As you refine your skills, this method will become instinctive, paving the way for consistent harvests of luscious tomatoes. Here's to your hydroponic journey and the delightful harvests ahead!

Learn about LetPot® and customer stories:

Other Plant Hydroponic Growing Tips

If you are also interested in other hydroponic plants, please read related articles.


Reading next

How to grow Common Sage in house

Leave a comment

All comments are moderated before being published.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.