Growing Tomatoes in Colorado: Tips for a Bountiful Harvest

Are you interested in growing tomatoes in Colorado? While it may seem challenging to grow this popular fruit in this region due to its unique climate and conditions, it is entirely possible to achieve a bountiful harvest with the right knowledge and techniques!

In this article, we will guide you through the various aspects of growing tomatoes in Colorado, including the best varieties, planning and preparation, planting techniques, care tips, and common problems. You’ll also learn about companion planting and how to protect your tomato plants from Colorado’s climate.

So, whether you’re an experienced gardener or a beginner, let’s dive into the world of growing tomatoes in Colorado!

Best Varieties of Tomatoes for Colorado

Growing tomatoes in Colorado requires careful selection of tomato varieties that can thrive in the region’s unique climate and conditions. Here are some of the best tomato varieties recommended for Colorado tomato gardening:

Variety Description
Early Girl This popular hybrid variety is known for its cold tolerance and early fruit set. It produces medium-sized, flavorful tomatoes in just 50-55 days.
San Marzano A paste tomato that is well-suited for Colorado’s hot, dry climate. It produces elongated, meaty tomatoes that are excellent for canning.
Cherokee Purple A heirloom variety that is resistant to cracking and blossom end rot. It produces large, sweet tomatoes with a distinctive purple color.
Black Krim Another popular heirloom tomato that performs well in Colorado’s cooler temperatures. It produces medium to large-sized tomatoes with a bold, smoky flavor.
Celebrity A disease-resistant hybrid variety that produces high yields of medium-sized, round tomatoes that are ideal for slicing and saucing.

Best Varieties of Tomatoes for Colorado: Factors to Consider

When choosing tomato varieties for Colorado tomato gardening, it is important to consider factors such as cold tolerance, disease resistance, and yield potential. Look for varieties that can handle the region’s temperature fluctuations and dry air, as well as resist common tomato diseases like blight and wilt. It is also a good idea to choose varieties that are known for their high yield potential, which can help ensure a bountiful harvest.

Planning and Preparation for Tomato Growing in Colorado

Tomatoes are a favorite crop for many gardeners in Colorado, but they require diligent planning and preparation to thrive in this challenging environment. Follow these steps for a successful tomato growing season:

Choose the Right Location

Select a location that receives at least six hours of direct sunlight each day and has good drainage. Avoid planting in low-lying areas that may collect cold air and frost, and keep in mind that tomatoes need protection from strong winds.

Prepare the Soil

Colorado’s dry climate requires soil amending to ensure proper drainage and moisture retention. Test the pH levels of your soil and adjust as necessary to achieve a range of 6.0 to 7.0 for optimal growth. Incorporate organic matter, such as compost or aged manure, to improve soil structure and fertility.

Timing is Key

Timing is everything when it comes to planting tomatoes in Colorado. Wait until the threat of frost has passed and the soil has warmed up to at least 60 degrees Fahrenheit before planting. In Colorado, this is usually around mid-May. Planting too early can damage or stunt the growth of your tomato plants.

Planting Techniques

When planting your tomato seedlings, make sure to bury them up to their first set of true leaves – this will encourage the development of a strong root system. Space plants at least two feet apart to allow for proper air circulation and reduce the risk of disease. Use stakes or cages to support the plants and prevent them from falling over.

Tomato Planting Techniques for Colorado

When it comes to successfully growing tomatoes in Colorado, proper planting techniques are key. Here are some tips to help you get started:

Planting Depth

Tomatoes should be planted deeply in Colorado to help them develop a strong root system and withstand the harsh climate. Dig a hole that is at least twice the diameter of the root ball and deep enough so that the top of the root ball is level with the soil surface. Remove the lower leaves from the stem and bury the plant up to the remaining leaves.


Give your tomato plants enough space to grow and produce. In Colorado, where the climate is dry and sunny, plants can get quite large. Indeterminate varieties can grow up to six feet tall and need a minimum of three feet between plants. Determinate varieties can be planted closer together, about 18 inches apart.


Tomatoes in Colorado need support to keep them off the ground and protect them from strong winds and hail. You can use tomato cages, stakes, or trellises to support your plants. Whichever method you choose, make sure it is strong enough to withstand the elements and the weight of the fruit.

By following these planting techniques, you can help your tomato plants thrive in Colorado’s unique growing conditions.

Caring for Tomato Plants in Colorado

Tomatoes in Colorado require consistent care to thrive and produce a bountiful harvest. Here are some essential tips to keep your tomato plants healthy:

  • Watering: Tomatoes in Colorado require consistent and deep watering to develop strong roots. Water your plants deeply once or twice a week, making sure to soak the soil around the roots. Avoid overhead watering as it can promote fungal diseases.
  • Fertilizing: Apply a balanced fertilizer every two to three weeks during the growing season to boost tomato plant growth. Organic options like compost tea and fish emulsion are great alternatives to synthetic fertilizers.
  • Pest Management: Colorado‚Äôs arid climate makes it less prone to certain pests that plague other regions, but tomato hornworms and aphids can still be a problem. Regularly inspect your plants for signs of infestation and use organic pest control methods like neem oil and soap sprays to deter them.

It’s essential to stay vigilant for common tomato diseases like early and late blight. If you notice any signs of disease, remove infected leaves and stems immediately to prevent further spread.

With proper care, your tomato plants in Colorado will produce delicious and juicy tomatoes all summer long.

Protecting Tomato Plants from Colorado’s Climate

Growing tomatoes in Colorado can be challenging due to the region’s unique climate. However, with the right protection techniques, you can help your plants thrive and produce a bountiful harvest.

Protecting from Temperature Fluctuations

Colorado’s temperature can fluctuate drastically, especially at night. To protect your tomato plants from cold weather, consider using frost blankets or row covers. These materials can help trap heat and keep your plants warm during chilly nights.

Protecting from Strong Winds

Colorado is known for its strong winds, which can damage tomato plants. To protect your plants from being blown over, consider using stakes or cages to provide additional support. You can also plant windbreaks such as tall grasses or shrubs to create a natural barrier.

Protecting from Hailstorms

Hailstorms are a common occurrence in Colorado and can cause significant damage to tomato plants. To protect your plants from hail, consider using netting or shade cloth to create a protective cover. You can also try using homemade hail guards made from foam or other materials.

With the right protection techniques, you can successfully grow healthy and thriving tomato plants in Colorado’s unique climate.

Harvesting and Storing Tomatoes in Colorado

Harvesting tomatoes in Colorado can be a tricky task, but with a little attention to detail, you can achieve a bountiful harvest. The good news is that tomatoes continue to ripen off the vine after they’ve been picked, so you don’t have to wait until they’re perfectly ripe.

When harvesting, gently twist the tomato off the vine, taking care not to damage the stem or the fruit. If the tomatoes are still green, you can ripen them indoors by placing them in a paper bag with an apple or banana. The ethylene gas released by the fruit will help speed up the ripening process.

Once your tomatoes are ready to eat, store them at room temperature away from direct sunlight. To prolong their shelf life, you can also store them in the refrigerator, but be aware that this can affect the flavor and texture of the fruit.

Tomato Type Storage Temperature Shelf Life
Cherry & Grape Tomatoes Room Temperature 2-3 days
Slicing Tomatoes Room Temperature 3-4 days
Green Tomatoes Room Temperature or in a Paper Bag with an Apple or Banana 1-2 weeks

By following these simple tips, you can enjoy the fruits of your labor all season long!

Common Tomato Growing Problems in Colorado and How to Solve Them

While growing tomatoes in Colorado can be incredibly rewarding, gardeners in this region may encounter some common challenges. Here are some solutions to help you overcome them:

Blossom-end rot

Blossom-end rot is a common problem that causes the bottom of fruits to become dark and leathery. It’s caused by a lack of calcium in the soil, which may be due to irregular watering or soil pH issues.

To prevent blossom-end rot, make sure to maintain consistent soil moisture and provide adequate calcium through fertilization or amendments. Keep the soil pH levels between 6.0 and 6.5.


Blight is a fungal disease that causes the leaves of tomato plants to turn brown and wilt. It can be caused by excess moisture or poor air circulation.

To prevent blight, make sure to plant your tomatoes in well-draining soil and provide adequate spacing between plants for proper air circulation. Avoid watering your plants from above, as this can spread disease. Consider using fungicides to control and prevent blight.


Tomatoes in Colorado may be susceptible to pests such as aphids, whiteflies, and cutworms. These pests can cause damage to leaves and fruits, leading to reduced yields.

To control pests, consider using natural methods such as introducing beneficial insects like ladybugs or lacewings to your garden, or using insecticidal soaps or oils. Regularly inspect your plants for signs of infestation and remove any affected leaves or fruits.

By following these tips, you can overcome common tomato growing problems in Colorado and enjoy a bountiful harvest of delicious, homegrown tomatoes.

Tomato Companion Plants for Colorado Gardens

While tomatoes are a delicious and rewarding crop to grow in your Colorado garden, companion planting offers a way to enhance their growth and health. By choosing plants that complement your tomatoes, you can deter pests, improve soil health, and boost yields.

Here are some excellent companion plants to consider:

Companion Plant Benefits
Basil Repels tomato hornworms and improves tomato flavor
Marigolds Deters nematodes and other harmful insects
Garlic Repels aphids and other garden pests
Nasturtiums Deters cucumber beetles and improves soil health

Just remember, each garden is unique, and some companion plants may work better than others depending on your specific conditions. Be sure to experiment and see what works best for you and your tomatoes!

Conclusion: Growing Tomatoes in Colorado

Congratulations, you are now equipped with the knowledge and tools to grow delicious tomatoes in Colorado. By following the tips and techniques outlined in this article, you can overcome the challenges of Colorado’s climate and enjoy a bountiful harvest of juicy, flavorful tomatoes.

Remember to choose the right tomato varieties for your region and soil type and to plan and prepare your garden properly. Bush and determinate varieties are ideal for small spaces, while indeterminate varieties require support.

Keep in mind that Colorado’s weather can be unpredictable, so it’s important to protect your plants from temperature fluctuations, strong winds, and hailstorms. Consider using row covers, frost blankets, or shade cloth to provide insulation and shelter.

Proper care and maintenance are essential for healthy tomato plants. Water your plants regularly and deeply, feed them with balanced fertilizer, and monitor them for pests and diseases. Early detection and treatment can save your crop.

Harvest your tomatoes when they are fully ripe for maximum flavor and nutrition. Store them in a cool, dry place, away from direct sunlight and heat. Use them in your favorite recipes or preserve them for later use.

Happy Gardening!


Q: What are the best varieties of tomatoes for Colorado?

A: The best tomato varieties for Colorado are those that are cold-tolerant, disease-resistant, and have a high yield potential.

Q: How do I plan and prepare for tomato growing in Colorado?

A: To plan and prepare for tomato growing in Colorado, choose the right location, properly prepare the soil, and plant at the right time.

Q: What planting techniques are recommended for tomato growing in Colorado?

A: Successful tomato growing in Colorado requires planting at the right depth, proper spacing, and the use of supports.

Q: What care tips should I follow for tomato plants in Colorado?

A: Essential care tips for tomato plants in Colorado include proper watering, fertilizing, and pest management.

Q: How can I protect tomato plants from Colorado’s climate?

A: To protect tomato plants from Colorado’s climate, provide insulation and shelter from temperature fluctuations, strong winds, and hailstorms.

Q: When and how should I harvest and store tomatoes in Colorado?

A: Harvest tomatoes in Colorado when they are ripe and store them properly to prolong their shelf life.

Q: What are common tomato growing problems in Colorado and how can I solve them?

A: Common tomato growing problems in Colorado include blossom-end rot, blight, and pests. Solutions and preventive measures can help address these issues.

Q: What are the best companion plants for tomato gardens in Colorado?

A: Companion plants such as marigolds, basil, and onions can benefit tomato growth and deter pests in Colorado gardens.

Q: What are the key takeaways for growing tomatoes in Colorado?

A: The key takeaways for growing tomatoes in Colorado include choosing the right varieties, proper planning and preparation, and providing care specific to the region’s climate.