How Far Apart to Plant Tomatoes in a High Tunnel

High tunnels are becoming increasingly popular among greenhouse growers who want to extend their growing season and protect their crops from pests and harsh weather conditions. Tomatoes are one of the most commonly grown crops in high tunnels due to their high demand and profitability. However, proper spacing is crucial to ensure that the plants receive enough light, water, and nutrients to thrive. In this article, we will discuss how far apart to plant tomatoes in a high tunnel.

Factors to Consider

The first step in determining the optimal spacing for tomatoes in a high tunnel is to consider the following factors:

Variety: Tomato varieties have different growth habits and require different amounts of space to grow.

Support System: Tomatoes require support to prevent them from falling over due to their heavy fruit. The support system will affect the spacing between the plants.

Light: Tomatoes need a minimum of six hours of direct sunlight per day to grow and produce fruit.

Airflow: Proper airflow is necessary to prevent fungal diseases and insect infestations.

Nutrient Availability: Tomatoes require adequate nutrients in the soil to grow and produce fruit.

Spacing Guidelines

Based on the above factors, the following guidelines can be used to determine how far apart to plant tomatoes in a high tunnel:

Cordon or Indeterminate Varieties: These varieties grow as vines and require support. They should be spaced 18-24 inches apart in rows that are 3-4 feet apart. The support system should be sturdy enough to hold the weight of the plants and their fruit.

Bush or Determinate Varieties: These varieties grow as compact bushes and do not require support. They should be spaced 24-36 inches apart in rows that are 4-6 feet apart.

Cluster Varieties: These varieties produce multiple fruits in a cluster and require more space than other varieties. They should be spaced 24-36 inches apart in rows that are 4-6 feet apart.

Other Tips for Growing Tomatoes in a High Tunnel

In addition to proper spacing, the following tips can help ensure successful tomato production in a high tunnel:

Watering: Tomatoes require consistent watering to prevent stress and fruit cracking. Use drip irrigation or a watering can to water the plants at their base.

Fertilizer: Use a balanced fertilizer that contains equal amounts of nitrogen, phosphorus, and potassium to provide the necessary nutrients for plant growth and fruit production.

Pest Control: Monitor the plants for pests and diseases, and use non-toxic pest control methods such as sticky traps, neem oil, and beneficial insects.

Harvesting: Harvest the tomatoes when they are fully ripe, as they will not continue to ripen once they are picked. This will also encourage the plant to produce more fruit.

Conclusion

Proper spacing is crucial for successful tomato production in a high tunnel. By considering the variety, support system, light, airflow, and nutrient availability, growers can determine the optimal spacing for their tomatoes. Additionally, following best practices for watering, fertilizing, pest control, and harvesting can help ensure a bountiful and profitable harvest.